Safety apparatus for controlling operation of functional equipment having movable parts

FIELD OF THE INVENTION

0001The present invention is related in general to apparatus for handling items or objects, e.g. for receiving, sorting and storing returnable items or objects, such as empty beverage containers like bottles, cans or the like. The invention is particularly useful in connection with reverse vending machines, although certain aspects of the present invention may also find other fields of use. In particular, the present invention relates to a safety apparatus for controlling operation of functional equipment having movable parts, said apparatus configured to use a camera to view and cause detection of a safety related event in a field of view of the camera, as defined in the preamble of attached claim 1.

BACKGROUND OF THE INVENTION

0002The present invention came about following the recognition of the need to provide a more cost efficient reverse vending machine, yet simple, reliable and space saving. In particular, it was recognized the need to reduce overall cost of manufacturing such new machines by addressing such important issues to as minimizing the number of expensive components, such as e.g. camera, barcode reader, object sorter, object conveyor, object rotator, and token printer, as well as minimizing required space, especially as regards floor area.

0003However, in such recognition, it was revealed that the invention would become related to a plurality of aspects which all in their own respective manner would contribute to a desirable end result.

0004In a decade or so, environmental and economical concerns have spurred significant developments in the field of facilities for collecting cans, bottles, jars and other containers, preferably for recovering the material for recycling purposes. These days, fully automatic systems are available that are capable of receiving and storing many different types of used containers, or even parts of used containers.

0005Arrangements for handling recyclable items like returnable empty beverage containers are <i>inter alia</i> known from the European publications <patcit id="pcit0001" dnum="EP0384885A"><text>EP 0 384 885</text></patcit> (SIG Schweizerische Industrie-Gesellschaft), <patcit id="pcit0002" dnum="EP1311448A"><text>EP 1311448</text></patcit>, and the International Patent Application publication <patcit id="pcit0003" dnum="WO0212096A"><text>WO02/12096</text></patcit> (<patcit id="pcit0004" dnum="EP1313656A"><text>EP 1313656</text></patcit>) (TOMRA SYSTEMS ASA) and <patcit id="pcit0005" dnum="EP14677328A"><text>EP 14677328</text></patcit> (TOMRA SYSTEMS ASA).

0006Till now, available fully automated systems, so-called reverse vending machines (RVMs) and back-room systems, that are capable of receiving and storing used containers have been quite complex and expensive. They have, therefore, mostly been found in larger stores, shopping centers or supermarkets, or in special facilities put up for collecting recyclable items or objects.

0007Accordingly, for the customer who has recyclable items or objects in smaller quantities, and who may not have at disposal a proper vehicle to facilitate easy transportation of recyclable material to a larger store, shopping center or supermarket that may be located at a distance from the person's home, it is often easier to throw the recyclable items out with the garbage.

0008The currently available reverse vending machines normally deliver the received objects to a back-room receiving facility or a downstairs facility. The total installation is expensive, requires substantial space, is often complex to install and service, and has operational drawbacks, in particular from a cleaning point of view. Frequent cleaning of soiled operational parts, suitably with water or special cleaning agent, is very important to secure failsafe operation. Returnable beverage containers frequently contain beverage leftovers, which often happen to come into contact with operational parts, thus making such parts sticky and causing operational failure if not properly cleaned. Cleaning is more than often a messy operation, and care has to be made not to harm electrical components.

0009Most RVMs need to have the ability to inspect identifying features on the object, such as e.g. a bar code. If such features are not immediately seen by a dedicated detector, the object will need to be rotated to find if such features are indeed present. An object rotating mechanism is expensive and requires substantial space in the longitudinal or depth direction of the RVM. Further, if such RVMs are also to provide object sorting, an additional sorter has to be provided, adding further to the cost of the installation, and the dimension of the RVM as regards depth dimension is in some cases prohibitive when both a rotator and a sorter are to be included. Also, most owners of stores, shopping centers or supermarkets are concerned over RVMs requiring substantial and expensive space for collecting the containers received by the RVM, such space frequently being occupied by container collection tables.

OBJECTS OF THE INVENTION

0010The present invention therefore has as a principal object to meet a long felt need to provide an improved automated facility for collecting returnable objects or items, such as recyclable items of plastic, metal or glass, and for overcoming the well-known mentioned drawbacks, thus yielding a low cost facility which exhibits optimal use of limited space, in particular floor space, that may be available almost everywhere, enabling their placement even in smaller stores, convenience stores, local gas stations and public areas. Thereby, such facilities may be more conveniently available to customers. These features and other features to appear through reading of the specification are some of the objectives of the present invention.

SUMMARY OF INVENTION

0011A conveyor means has been described in connection with an inventive facility which allows storage of a large number of returnable items or objects in a mostly vertically oriented storage space without employing a vertical conveyor for filling the storage space.

0012Thus, such conveyor means provides usefulness with an upwardly oriented storage having an interior space for storing height-wise returnable items.

0013The upwardly oriented storage is suitable for storing in a substantially upwards filling direction returnable objects or items, particularly returnable containers like bottles, cans and the like, preferably such that are made from plastic, glass or metallic material.

0014Embodiments of the storage space part of the storage facility will be further disclosed in the detailed part of the description.

0015The conveyor means is disclosed in the detailed description inter alia for use with a facility for receiving returnable items.

0016Such conveyor means is useful for receiving and sorting returnable items, and in the present context preferably for delivering returnable items for storing in a storage facility, and it has been the purpose to provide for a very compact conveyor means for such use.

0017The features of embodiments the conveyor means appear from the detailed description.

0018Advantageous embodiments of a rotary drum type of conveyor means are in particular described.

0019However, the present disclosure also describes an alternative to the rotary drum type of conveyor means, the alternative being in the form of a plunger type of conveyor means.

0020The conveyor means as defined are particularly suitable for feeding returnable objects or items, particularly returnable containers like bottles, cans and the like, preferably made from plastic, glass or metallic material to a vertically or upwardly oriented storage for storing returnable objects or items in a substantially upwards filling direction.

0021More specifically, the conveyor means is adapted to handle, sort and convey returnable items or objects, and for feeding such items or objects into the substantially vertically or upwardly oriented storage space, without employing a vertical conveyor for filling the storage space.

0022In recognition of the necessity to be able to view and recognize characteristic features of an object, there is described a device for enabling camera viewing of characteristic features of an object in order to subsequently enable processing of signals related to viewed features.

0023Further, such a device is intended to enable camera viewing of two regions of an object, in order to subsequently enable processing of signals related to viewed features.

0024In addition, such camera viewing can be of a location where the object can be placed and thereby cause subsequent recognition of the contour of the object, a lens being arranged between the camera and said location.

0025Further, the device enables use of a single camera.

0026Still further, there is disclosed a device using a camera to view characteristic features of an object against a light providing or bright background area, in order to subsequently enable processing related to viewed features.

0027It is important to note that the recited camera viewing features are closely interrelated.

0028From prior art it is conventional to view an object or article, e.g. empty beverage packaging, such as a can or bottle, against a light reflective background , the viewing being made via a lens in order that light rays which are sent towards the object are parallel rays. <patcit id="pcit0006" dnum="DE19512133A1"><text>DE 19512133 A1</text></patcit> discloses such technique. On the basis of such viewing, analysis for object contour is made.

0029However, simultaneously with viewing of shape of a bottle or can, as disclosed in said <patcit id="pcit0007" dnum="DE19512133A1"><text>DE 195 12 133 A1</text></patcit>, there has also been the need to view and recognize or read other characteristic features, such as a bar code on the can or bottle.

0030In a reverse vending machine (RVM), it is conventional to view and recognize shape of the object at one location in the RVM and to recognize other identifiable characteristic features such as indicia, barcode etc. at another location. If e.g. a barcode is not directly visible to a barcode reader, the object must be rotated until the barcode becomes visible and can be read by the reader.

0031It is a well known fact that in order to be able to detect both contour of the object and read indicia or identifying features located on the object, including object rotation to find and read identifying features, multiple and separate operating units need to be provided, thus requiring extra space within the RVM to carry out the operations. If there is in addition the requirement of a sorting function, additional challenges arise as regards available space. Said EP publications <patcit id="pcit0008" dnum="EP1311448A"><text>EP1311448</text></patcit> and <patcit id="pcit0009" dnum="EP1313656A"><text>1313656</text></patcit> disclose, with reference to an RVM for beverage container such as bottles and cans, the provisions of contour detection, barcode reading and beverage container sorting. Contour detection and sorting is made by one operating unit (see <patcit id="pcit0010" dnum="EP1313656A"><text>EP 1313656</text></patcit>), and a further operating unit (<patcit id="pcit0011" dnum="EP1311448A"><text>EP1311448</text></patcit>) provides for beverage container rotation to find a barcode and barcode reading.

0032<patcit id="pcit0012" dnum="US5934440A"><text>US 5 934 440</text></patcit> discloses a device with a detection station for reading barcode, rotation of the object such as e.g. a bottle to locate a barcode not immediately visible, as well as a sorting function. However, the possibility of detecting an object contour at such station is not available and needs to be performed by a separate station suitably located upstream, as disclosed in said patent.

0033It has therefore been a long felt need to provide for a technical solution which yields a more compact, yet simple and cost-effective arrangement and with the possibility of both detection of contour and identifying features located on the object, as well as a sorting function and other optional functions.

0034Accordingly, the present disclosure also describes a device which makes use of camera aid to provide for major detection functions, and with other benefits resulting from the overall structure.

0035In recognition of the need to avoid operational hazards as far as possible, and above all avoid any accidental injury to a user of the facility the present invention relates to a safety apparatus for controlling operation of functional equipment having movable parts.

0036It is a well known technique in a reverse vending machine (RVM) to provide movement detectors or light curtains in the form of transmitter/ receiver pairs to detect when an object has reached a particular position in the RVM , to alert if someone tries to move a hand into the RVM, or to view a video image to detect entry into or direction of movement into a detection region as seen by a camera. Upon such detection, action can be taken to inhibit further operation of moving parts and/ or trigger an alarm. Further, in the case of transmitter/ receiver pairs, expensive hardware has to be installed, aligned and serviced.

0037European Patent <patcit id="pcit0013" dnum="EP0910485A"><text>EP-0910485</text></patcit> (TOMRA SYSTEMS ASA) discloses a camera functionality in order to control movements in a camera field of view in connection with a reverse vending machine. Such movement control is software related.

0038If a particular part of a camera provided image of e.g. an entry region of a device such as a reverse vending machine for empty beverage containers is to be used for monitoring safety hazard, any software update related to camera function must also be documented and certified to ensure that said monitoring capability is still operative. Such process is time consuming and expensive. In case of e.g. camera failure, the image may appear blank as if no activity or events in the camera field of view would be present. In such a situation, an inherent safety hazard may be present.

0039Safety hazards e.g. include the risk of a person getting a hand injured if put into the RVM, or operational failures due to incorrect handling of the RVM by a person.

0040The invention has therefore as an object to avoid the inherent drawbacks of the prior art solutions related to avoiding safety hazards.

0041The present invention accordingly describes useful and novel embodiments of such safety apparatus, and the characteristic features thereof appear from the attached claim 1. Further embodiments of the safety apparatus appear from the attached sub-claims 2 - 8.

0042This is explained in more detail with reference in particular to drawing <figref idref="f0040">figs. 37a</figref>, <figref idref="f0041">37b</figref>, <figref idref="f0041">37c</figref>, <figref idref="f0042">40a and 40b</figref>.

0043Reverse vending machines conventionally issue a specially printed token related to the return or redemption value of empty beverage containers received by the reverse vending machine (RVM), and the token is then taken to a rewarding unit or so-called checkout and payment station to get a cash reward or a cash deduction from a bill to be paid for other sales items or objects, e.g. groceries. However, it has also been a long felt desire to simplify dispensing of tokens in a RVM to avoid occasional and inherent printer failures well known to the expert in the art when tokens are to be printed with individual return value related data.

0044The present disclosure therefore also relates to a token system for use with a reverse vending machine suitable for receiving empty packaging in the form of empty beverage containers.

0045Closely linked thereto is a token system related to a reverse vending machine which is configured to detect and identify features of an object, tokens being dispensable one-by-one from a token dispenser and configured to be related to an object being observable and detectable for object identification.

0046Security measures have over the past years been implemented in order to avoid recurring swindle attempt through presentation at the rewarding unit of home-made tokens with a redemption value printed thereon. Thus, the new tokens issued have also included a particular serial number, and both the redemption value and the serial number have been communicated from the RVM to a central computer, suitably located in the store or supermarket, in order to validate the token, and when the token has been presented at the rewarding unit, payment is made to the customer and the central computer then invalidates the token by removing the data from availability at the rewarding unit.

0047The tokens are usually made from thin paper from a roll of paper passing through a printer, suitably a thermal printer, before it is issued to the customer. Experience has, however, shown that use of such printed paper tokens has the drawback that the printer occasionally fails, the printer is expensive and needs maintenance service at regular intervals, and the paper from the paper roll is expensive and needs to be of a particular quality to yield as low failure rate as possible.

0048Given some of the disadvantages of the prior art tokens, it is therefore, according to the present disclosure, an object to provide for a token system that avoids printing of tokens in an RVM, yet provides the required security against swindle attempts and avoids the use of any printer and related printer maintenance.

0049Embodiments of a preferred token system will therefore be disclosed later in the present specification.

0050In addition to the features of the invention as defined in claims 1 - 8, the present disclosure is also concerned with the inherent problems in a reverse vending machine of disconnecting operational units for cleaning purposes, services etc., and there is accordingly described a novel drive device in a reverse vending machine to forcibly drive at least one handling unit suited to handle empty packaging in the form of empty beverage containers.

0051It is well known in the art that equipment used for handling empty beverage containers in a reverse vending machine (RVM) is frequently soiled by beverage leftovers coming from the interior of such containers, and causing malfunction of the equipment or drive motor overload if not properly washed and cleaned at regular intervals, in many cases with a necessity for cleaning once every day.

0052Such equipment is conventionally made with drive motors firmly attached to the equipment either on the outside or internally, and with sophisticated or expensive plug /socket connection to power supply in the reverse vending machine.

0053When cleaning such equipment, often with hot water and/or pressurized water or other cleaning agent, motors and connectors may be damaged or get moist through intrusion of water, with the inherent risk of malfunction through leakage currents or even short-circuit. Therefore, expensive and sophisticated technical solutions have to be designed to avoid such damages or other operational problems or hazards. Such solutions may therefore include special purpose motors, plug and socket units, wiring etc.

0054The present invention therefore intends to overcome the present every-day problem linked with the operation of reverse vending machines which are in need of frequent cleaning to remove spillage of beverage leftovers which are more than often with a very high sugar content, resulting in sticky functional components and adherence between components, causing unnecessary wear and tear on functional components and drive units, causing reduced life of many components, as well as substantial risk of malfunction.

0055Preferred embodiments of the drive device appear from the detailed description.

0056In the following, the safety apparatus, as well as aspects related to an upwardly oriented storage, a conveyor means, a device for camera aided viewing of characteristic features of an object, a token system and a drive device, will be explained by way of examples and by reference to the accompanying drawings, wherein the same reference numerals indicate the same elements, although as regards some elements, different reference numerals have been used for elements having same properties of functioning and for practical reasons.

BRIEF DESCRIPTION OF THE DRAWINGS

0057In the drawings:

0058<figref idref="f0001">fig. <b>1a</b></figref> shows in a perspective view , an exemplary mode of a reverse vending machine with object storage chamber; object supporting, rotating, sorting and conveyor means; camera-aided detector device; supplementary item/ object collector means; token dispenser; token reader; safety apparatus; and drive means,

0059<figref idref="f0002">figs. <b>1b</b> and <b>1c</b></figref> show the object rotating, sorting and conveyor means with its longitudinal axis tilted relative to the horizontal,

0060<figref idref="f0003">fig. <b>2a</b></figref> shows an exemplary embodiment of an essentially upwardly oriented storage or storage chamber,

0061<figref idref="f0004">figs. <b>2b</b></figref> and <figref idref="f0005"><b>2c</b></figref> show the embodiments of <figref idref="f0003">fig. <b>2a</b></figref> in association with a compactor.

0062<figref idref="f0006">fig. <b>3</b></figref> is a further a principle drawing of a storage space or chamber for a storage facility,

0063<figref idref="f0007">fig. <b>4</b></figref> is a principle drawing showing a first embodiment of an expandable storage chamber for a storage facility,

0064<figref idref="f0008">fig. <b>5</b></figref> is a principle drawing showing a second embodiment of an expandable storage chamber for a storage facility,

0065<figref idref="f0009">fig. <b>6</b></figref> is a principle drawing showing an exemplary layout of a storage facility having multiple storage chambers,

0066<figref idref="f0010">fig. <b>7</b></figref> is a principle drawing showing an exemplary possible layout of a storage facility having multiple storage chambers and a drum type conveyor unit,

0067<figref idref="f0011">fig. <b>8</b></figref> is a principle drawing showing a possible layout of a storage facility having multiple storage chambers, a conveying and sorting means, and means for reading information from, or detecting the type of, returnable item or object being positioned in an input receiving area,

0068<figref idref="f0012">fig. <b>9</b></figref> is a partial sectional view of a drum type conveyor for a storage facility, being positioned in a first rotational position,

0069<figref idref="f0013">fig. <b>10</b></figref> is a perspective view of the drum type conveyor shown in <figref idref="f0012">fig. 9</figref>,

0070<figref idref="f0014">fig. <b>11</b></figref> is a partial sectional view of an embodiment of a drum type conveyor for incorporation in <u style="single">a storage facility,</u> the drum being in a second rotational position with a piston like plunger element in a retracted position,

0071<figref idref="f0015">fig. <b>12</b></figref> is a perspective view of the conveyor of <figref idref="f0014">fig. 11</figref>,

0072<figref idref="f0016">fig. <b>13</b></figref> is a partial sectional view of an embodiment of a drum type conveyor for incorporation in the storage facility, the drum being rotated in a first direction from the second position to assume a third rotational position in which with the piston-like plunger element is in an advanced position,

0073<figref idref="f0017">fig. <b>14</b></figref> is a perspective view of the positional state of the drum type conveyor of <figref idref="f0016">fig.13</figref>,

0074<figref idref="f0018">fig. <b>15</b></figref> is a partial sectional view of an embodiment of a drum type conveyor for incorporation in a storage facility, with the drum rotated in a direction opposite to that starting at <figref idref="f0014">figs. 11</figref>, <figref idref="f0015">12</figref> and ending at <figref idref="f0016">figs. 13</figref>, <figref idref="f0017">14</figref>, i.e. a rotation in clockwise direction - as viewed on <figref idref="f0018">fig. 15</figref> - from the second position to the first position to assume a further rotational position with the piston-like plunger in an advanced, downwardly facing position,

0075<figref idref="f0019">fig. <b>16</b></figref> is a perspective view of positional state of the drum type conveyor of <figref idref="f0018">figure 15</figref>, as seen partly from below,

0076<figref idref="f0020">fig. <b>17</b></figref> is a perspective view of an embodiment of a drum type conveyor for incorporation in a storage facility, having a roller and a load cell applied to the roller,

0077<figref idref="f0021">fig. <b>18</b></figref> is an illustration of a drum type conveyor embodiment positioned in a cabinet with a bearing for the roller and load cell on a movable arm,

0078<figref idref="f0022">fig. <b>19</b></figref> shows the bearing and load cell arrangement of <figref idref="f0021">figure 18</figref> with the movable arm positioned for bearing and load cell engagement with a roller,

0079<figref idref="f0023">fig. <b>20</b></figref> is a principle drawing of a first embodiment of a conveyor having a moveable plunger in a stationary housing and useful for a storage facility,

0080<figref idref="f0024">fig. <b>21</b></figref> is a principle drawing of the conveyor of <figref idref="f0023">fig. 20</figref> in a different operational state,

0081<figref idref="f0025">fig. <b>22</b></figref> is a principle drawing of a second and modified embodiment of the conveyor of <figref idref="f0023">figs. 20</figref> and <figref idref="f0024">21</figref>,

0082<figref idref="f0026">fig. <b>23</b></figref> is a schematic side view of the conveyor of <figref idref="f0025">figure 22</figref>,

0083<figref idref="f0027">fig. <b>24</b></figref> is a principle drawing of the conveyor of <figref idref="f0023 f0024 f0025 f0026">figs. 20 - 23</figref> to illustrate rotation of a returnable item received in the input receiving area of the conveyor,

0084<figref idref="f0028">fig. <b>25</b></figref> is a principle sketch of a first embodiment of a camera-aided viewing device for viewing an object with regard to contour of the object and identifying features or indicia on the object,

0085<figref idref="f0029">fig. <b>26</b></figref> is a principle, though slightly more detailed sketch of the first embodiment of the camera-aided viewing device showing in more detail a first object supporting, rotation, sorting and conveying means,

0086<figref idref="f0030">fig. <b>27</b></figref> is a principle sketch of a second embodiment of the camera-aided viewing device,

0087<figref idref="f0031">fig. <b>28</b></figref> is a principle sketch of a third embodiment of the camera-aided viewing device,

0088<figref idref="f0032">fig. <b>29</b></figref> is a principle sketch of a fourth embodiment of the camera-aided viewing device,

0089<figref idref="f0033">fig. <b>30</b></figref> is a principle sketch of a fifth embodiment of the camera-aided viewing device,

0090<figref idref="f0034">fig. <b>31</b></figref> is a principle sketch of a sixth embodiment of the camera-aided viewing device,

0091<figref idref="f0035">fig. <b>32</b></figref> is a principle sketch of a second object supporting, rotation, sorting and conveying means,

0092<figref idref="f0036">fig. <b>33</b></figref> is a principle sketch of a seventh embodiment of the camera-aided viewing device,

0093<figref idref="f0037">fig. <b>34</b></figref> is a principle sketch of an eight embodiment of the camera-aided viewing device,

0094<figref idref="f0038">fig. <b>35</b></figref> is a principle sketch of a ninth embodiment of the camera-aided viewing device,

0095<figref idref="f0039">fig. <b>36</b></figref> is a principle sketch of a tenth embodiment of the camera-aided viewing device,

0096<figref idref="f0040">fig. <b>37a</b></figref> shows a camera image with two image parts, and <figref idref="f0041">fig. <b>37b</b></figref> shows a camera surveillance image with a set of dedicated camera image sensor matrix pixels indicated,

0097<figref idref="f0041">fig. <b>37c</b></figref> shows a simplified circuit diagram forming part of the block schematic diagram in <figref idref="f0044">fig. 46</figref>,

0098<figref idref="f0040">fig. <b>38</b></figref> is a principle sketch to illustrate camera reading of bar-code on a token in a token storage device,

0099<figref idref="f0040">fig. <b>39</b></figref> is an exemplifying token,

0100<figref idref="f0042">fig. <b>40a</b></figref> is a partial view of a supporting device and a background area or panel,

0101<figref idref="f0042">fig. <b>40b</b></figref> is a variant of the background area or panel shown on <figref idref="f0042">fig. 40a</figref>,

0102<figref idref="f0042">fig. <b>41a</b></figref> is a sketch of a first embodiment of a token reading means,

0103<figref idref="f0042">fig. <b>41b</b></figref> is a sketch of a second embodiment of a token reading means,

0104<figref idref="f0042">fig. <b>42</b></figref> is a perspective view of a part of the view of <figref idref="f0040">fig. 38</figref>,

0105<figref idref="f0043">figs. <b>43 - 45</b></figref> are perspective views of a token dispenser seen from below, from the side and above, and substantially from above, respectively,

0106<figref idref="f0044">fig. <b>46</b></figref> is a block schematic diagram of electrically or electronically operative elements in a system incorporating the invention,

0107<figref idref="f0045">fig. <b>47</b></figref> is a principle sketch to illustrate drive means for rotatably driving a drum in said object supporting, rotating, sorting and conveyor means,

0108<figref idref="f0046">fig. <b>48a</b> and <b>48b</b></figref> are principle sketches to illustrate a mechanical drive coupling between drive means (<figref idref="f0046">fig. 48a</figref>) and a handling device, e.g. a "soft-drop" storage container (<figref idref="f0046">fig. 48b</figref>),

0109<figref idref="f0047">fig. <b>49a</b></figref> shows in principle an alternative mechanical drive coupling, and <figref idref="f0047">fig. <b>49b</b></figref> is a modification thereof,

0110<figref idref="f0048">fig. <b>50a</b></figref> shows the sketch of <figref idref="f0045">fig. 47</figref> with a first type of drum rotational position sensors indicated,

0111<figref idref="f0048">fig. <b>50b</b></figref> shows the sketch of <figref idref="f0045">fig. 47</figref> with a second type of drum rotational position sensors indicated, and

0112<figref idref="f0049">fig. <b>51</b></figref> shows in a perspective view a reverse vending machine with object storage chamber; object supporting, rotating, sorting and conveyor means; item collector means; token dispenser; token reader; and drive means,

SPECIFIC DESCRIPTION

0113<b><u style="single">RVM overview</u></b>

0114<figref idref="f0001">Fig. <b>1a</b></figref> illustrates in an exemplary embodiment a reverse vending machine (RVM) <b>1</b> embodying main inventive aspects of the present invention, .i.e. object storage chamber <b>2;</b> object supporting, rotating, sorting and conveyor unit <b>3;</b> camera-aided detector device <b>4;</b> supplementary item/ object collector means <b>5;</b> token dispenser <b>6;</b> token reader <b>7 ,</b> safety apparatus <b>8,</b> and drive means <b>9; 9'.</b> The unit <b>3</b> (later denoted as <b>200)</b> could have to have its longitudinal axis <b>3'</b> horizontal or forming an angle α with the horizontal, yielding angle β in the range ± 0° - 30°, as indicated on <figref idref="f0002">figs. <b>1b</b> and <b>1c</b></figref><b>.</b> In the more detailed disclosure to follow, the operational means <b>2 - 9</b> just mentioned will for practical reasons be denoted by other reference numerals. Direction is also made to <figref idref="f0049">fig. <b>51</b></figref> showing the figure of <figref idref="f0001">fig. <b>1a</b></figref><b>,</b> however with more reference numerals inserted to identify location of some of the various operational means which are extensively disclosed in the disclosure to follow in connection with <figref idref="f0005 f0006 f0007 f0008 f0009 f0010 f0011 f0012 f0013 f0014 f0015 f0016 f0017 f0018 f0019 f0020 f0021 f0022 f0023 f0024 f0025 f0026 f0027 f0028 f0029 f0030 f0031 f0032 f0033 f0034 f0035 f0036 f0037 f0038 f0039 f0040 f0041 f0042 f0043 f0044 f0045 f0046 f0047 f0048">figs. <b>2 - 50</b></figref><b>.</b>

0115<b><u style="single">Upwardly Oriented Storage</u></b>

0116With reference to <figref idref="f0003">fig. <b>2a</b></figref> showing a principle drawing of a storage chamber according to the present invention, certain features relating to the storage chamber and the principles of the invention will now be explained. In an advantageous embodiment of the invention, the storage chamber has an elongated and vertically oriented shape, with bottom and side walls, wherein the side walls are spaced apart, preferably sufficiently to allow for a side-by-side storage of a plurality of returnable items. The storage chamber has an in-feed opening in the lower part of the chamber, preferably arranged in one of the side walls, and feeding of the storage is obtained by driving returnable objects or items to be stored in the chamber into the storage chamber through the in-feed opening. By properly selecting the force by which the objects or items are driven into the storage chamber, and preferably by applying a forced pushing or thrust mode drive, objects/ items already positioned in the storage chamber will be driven away from the in-feed opening and into the interior or back of the chamber until the chamber has been filled to the level at which the in-feed opening is located, and thereafter driven upwards by further objects/items being driven into the chamber.

0117In the illustration of <figref idref="f0003">fig. <b>2a</b></figref><b>,</b> the storage chamber <b>100</b> illustrating the invention is provided with a bottom part <b>120</b> and a side wall <b>130, 131 or 132,</b> respectively, and an upper part <b>150.</b> An in-feed opening <b>140</b> is located in the lower part of one of the side walls. To allow the storage space <b>110</b> to be safely emptied into removable transport container (not shown), e.g. a large box, for removal of returnable items <b>10</b> collected in the storage space or chamber <b>110,</b> the bottom <b>120</b> can be made movable or removable, or one of the side walls <b>130</b> can be made movable such that items stored in the chamber or space <b>110</b> can be removed therefrom. As the chamber is being filled by returnable objects/ items <b>10,</b> it can be expected that the force applied to drive additional objects/ items <b>10</b> into the storage through the in-feed opening <b>140</b> may give rise to some tension in the items already in the storage, due to other forces such as from friction or the weight of the stored items <b>10.</b> Tension or friction may typically result in problems when trying to empty a filled storage space, for which reason a movable interior wall <b>132</b> is proposed, such that, in the case where the bottom part <b>120</b> is adapted to be opened to empty the storage space, the interior wall <b>132</b> may be moved in a direction away from the items <b>10</b> already located in the storage room. Thus, the tension is relieved and friction is reduced. This will allow for easy emptying of the storage. As the storage room becomes filled above the input opening, there is a risk that objects/items already positioned in the storage space may flow back through the in-feed or inlet opening. To stop such possible back-flow, a back-flow blocking arrangement <b>170</b> is preferably provided in the area of the in-feed opening.

0118The storage space exhibits a width dimension <b>111</b> being a multiple of the width dimension <b>11</b> of a returnable item for storage in said upwardly oriented storage, whereby a plurality of returnable items can be accommodated substantially or at least in part side by side in the interior space.

0119On <figref idref="f0003">fig. <b>2a</b></figref><b>,</b> a conveyor <b>200</b> for feeding items into the storage <b>100</b> is shown. Exemplary embodiments of such conveyor will be described with particular reference to <figref idref="f0011 f0012 f0013 f0014 f0015 f0016 f0017 f0018 f0019 f0020 f0021 f0022 f0023 f0024 f0025 f0026 f0027">figs. <b>8-24</b></figref><b>.</b>

0120Although <figref idref="f0003">fig. <b>2a</b></figref> illustrates a theoretical side-by-side stacking of returned items 10 lowermost inside the storage, practical tests have proved that the items in fact may be lying at least partly in a "criss-cross" manner, as indicated higher in the storage chamber. Thus, in general at least a partly "criss-cross" stacking will be present throughout the stacking in the chamber.

0121<figref idref="f0004">Fig. 2b</figref> illustrates the use of an item or object compactor device <b>290</b> between the conveyor <b>200</b> and the storage <b>100.</b> The compactor device <b>290</b> could be of any suitable type. In a particular exemplary embodiment it could be in the form of a set of spike-provided chains in a wedge-like arrangement in order to provide gradually flattened and punctured returnable items. The use of a set of flattening rollers acting as a compactor device could also be envisaged, as well as other types of well-known compactors.

0122Although the conveyor <b>200</b> is included upstream of the compactor <b>290</b> on <figref idref="f0004">fig. <b>2b</b></figref><b>,</b> it will be appreciated that in a particular embodiment the storage <b>100</b> and the compactor <b>290</b> could be able to work without the use of the conveyor <b>200.</b> In an alternative, as generally indicated on <figref idref="f0005">fig. <b>2c</b></figref><b>,</b> a conveyor could be included, as indicated on <figref idref="f0004">fig. <b>2b</b></figref><b>,</b> or the conveyor needs not to be provided, or it could be operationally integrated with the compactor unit, the integrated unit being labeled <b>291.</b>

0123The compactor device <b>290</b> of <figref idref="f0004"><b>fig.2b</b></figref> indicates that it receives returnable items with the longitudinal axis of the item <b>10</b> in question transverse to the in-feed direction. The compactor device <b>291</b> shown on <figref idref="f0005">fig. <b>2c</b></figref><b>,</b> is suitably of a type capable of receiving the returnable item <b>10</b> with its longitudinal axis in the in-feed direction. This implies however that the transverse dimension <b>111</b> of the storage should preferably be a dimension <b>11'</b> related to the compacted item 10' which exceeds at least a maximum longitudinal extent <b>11"</b> of an item <b>10</b> to be compacted.

0124It will be noted that when items are fed into the storage <b>100,</b> after compaction, the orientation of the compacted items will be rather arbitrary or highly in a "criss-cross" fashion, irrespective of whether the items where fed into the compactor in a transverse or longitudinal direction.

0125Now, with reference to <figref idref="f0006">fig. <b>3</b></figref><b>,</b> an alternative storage chamber in-feed arrangement is explained. In the principle shown in <figref idref="f0006">fig. <b>3</b></figref>, when compared with the principle shown in <figref idref="f0003 f0004 f0005">fig. <b>2a -2c</b></figref><b>,</b> the in-feed opening <b>140</b> is no longer positioned in a side wall, but rather in a bottom part <b>122</b> of the storage chamber <b>100.</b> By this arrangement, items <b>10</b> to be stored will be provided with an upwardly directed movement or drive force component as a result of the in part upwardly directed drive component applied to drive items into the storage space. Similarly to what is shown in <figref idref="f0003 f0004 f0005">figs. <b>2a - 2c</b></figref><b>,</b> there may be provided several options for removing items stored in the storage space, such as by a movable or removable bottom part <b>121,</b> or by a side wall arrangement as shown by <b>130, 131</b> or <b>132</b> in <figref idref="f0003 f0004 f0005">figs. <b>2a -2c</b></figref><b>.</b> The storage chamber illustrated is adaptable to handle an overflow of stored items 10 by being provided with an overflow opening <b>160</b> through which excess object/ items due to an overfilling of the storage space may exit from the storage chamber <b>110</b> and thereby relieve the storage chamber <b>110</b> from possible additional stress, as may result from further filling of the chamber by additional items <b>10</b> when the chamber has reached a point of maximum filling.

0126<figref idref="f0007">Fig. <b>4</b></figref> illustrates in principle an expandable storage chamber for a storage facility according to the invention. The storage chamber may have any type of in-feed opening in its lower part as illustrated by <figref idref="f0003 f0004 f0005">figs. <b>2a - 2c</b></figref> or <b>3</b> and is made expandable by a movable top section <b>151.</b> Advantageously, by making the movable top section <b>151</b> from a light weight material, the driving force applied to a returnable object/ item that enters the storage space through the in-feed opening will be sufficient to move the top section in an upward direction to allow an expansion of the storage chamber. The upward movement of the top section <b>151</b> can also be facilitated by mechanical, electrical, hydraulic or pneumatic means, to mention a few, such that the driving force applied to an object or item <b>10</b> that enters the storage space can be kept at a level that is independent of the design of or materials selected for the top section.

0127<figref idref="f0008">Fig. <b>5</b></figref> illustrates the principle of another alternative for providing an expandable storage chamber, wherein the upper part <b>150</b> comprises flexible members that by an upwards movement of the upper part and the connected flexible members <b>152</b> will provide an increase of the storage space as the storage fills with returned items. Advantageously, as explained above with reference to <figref idref="f0007">fig. <b>4</b></figref><b>,</b> the top section and flexible members preferably are made from light weight material, such that the upward movement required for expanding the storage chamber may be facilitated by the force applied when driving an element into the storage space through the input in-feed opening. A vertical movement of the upper section and the flexible members <b>152</b> can be provided by other means, such as electrical, mechanical, hydraulic or pneumatic, to mention a few.

0128Reference is now made to <figref idref="f0009">fig. <b>6</b></figref><b>,</b> which provides an illustration of the principles of the present invention in a possible layout having multiple storage chambers. The exemplary storage facility illustrated in <figref idref="f0009">fig. <b>6</b></figref><b>,</b> comprises as many as three storage chambers <b>110, 112</b> and <b>114,</b> respectively, each having a respective in-feed opening positioned for being in communication with a conveyor <b>200</b> being capable of receiving an item in an input receiving area <b>110</b> and conveying the received item <b>10</b> to a selected one of in-feed openings <b>141, 142</b> and <b>143</b> (see also reference numerals <b>263, 264</b> and <b>265</b> with respect to the embodiments of <figref idref="f0023 f0024 f0025 f0026 f0027">figs. <b>20 - 24</b></figref> and <b>32)</b> of the storage chambers <b>110, 112</b> and 114, respectively. The storage chamber <b>110</b> is provided with a cooperating supplementary storage space <b>161</b> in communication with the first storage chamber <b>110</b> by overflow openings <b>160</b> in the upper part of adjacent side walls. Storage chambers <b>110</b> and <b>112</b> have respective in-feed openings <b>141</b> and <b>142</b> located in respective side walls in their lowermost parts, and are dimensioned appropriately to provide a filling of the respective chamber in an upwardly direction when the appropriate item is driven into the chamber through the respective in-feed opening. In the example of <figref idref="f0009">fig. <b>6</b></figref><b>,</b> storage chamber <b>110</b> has been provided with a deflector <b>180</b> located inside the chamber and at an appropriate distance from the in-feed opening <b>141</b> to provide an upwardly directed force component to objects/ items being driven or forced into the storage space in a specific direction, although the driving force may already have an upwardly directed drive component. Thus, the upwardly directed drive forces exerted on the item <b>10</b> as it enters the chamber may become more consistent, and also less dependent on the shape and nature of other items <b>10</b> already located in the storage. Advantageously, the deflector can be moveable, such as by being tiltable or even removable, to allow easy and complete removal of all items held in the storage chamber when the storage chamber is to be emptied.

0129<figref idref="f0010">Fig. <b>7</b></figref> shows a simplified variant of the layout depicted in <figref idref="f0009">fig. <b>6</b></figref><b>,</b> and with a conveyor of a drum type that provides a highly compact facility for receiving, transporting, sorting and storage of returnable items. The arrangement shown in <figref idref="f0010">fig. <b>7</b></figref> is capable of sorting, conveying and storing large quantities of returnable items while requiring a very small floor space, by employing the compact conveyor and sorter <b>200</b> and the vertically oriented storage system of the present invention. Thus, the need for use of a separate lifting arrangement to fill from a low level a tall storage space is being eliminated, such that in a practical implementation and embodiment the storage chamber may extend from any level and up to a ceiling above as desired, which is highly beneficial in a small business environment, like in a convenience store or a gas station, where available floor space typically is quite limited. The <figref idref="f0010">fig. <b>7</b></figref> embodiment provides for the additional storage or item collector <b>114</b> below the conveyor and sorter <b>200.</b> In the case of receiving returnable items like bottles and cans, glass bottles could e.g. be dropped by gravity into the collector <b>114</b> when the conveyor and sorter <b>200</b> has brought such a type of item to be just above a receiving opening of the collector <b>114.</b>

0130<figref idref="f0011">Fig. <b>8</b></figref> illustrates a further exemplary embodiment layout of the present invention that utilizes a highly compact drum based conveyor with as many as three different storage chambers, denoted by <b>110, 112</b> and <b>114,</b> for storing different types of returnable items <b>10.</b> The conveyor <b>200</b> is adapted to receive items <b>10</b> in an input receiving area <b>210,</b> and to move and output the item, based on certain criteria and a decision made by a controller that operates a drum drive unit, at either a first output <b>224</b> for driving the item into a storage space <b>110,</b> or to a second output, which is either the second output <b>226</b> for driving a received item <b>10</b> into the related storage chamber <b>112,</b> or the second output <b>226'</b> for, in this particular embodiment, allowing also gravity to assist in moving the item <b>10</b> from the conveyor to the related storage space <b>114.</b> The storage space <b>114</b> is particularly useful for items to which a relatively high driving force should not be applied, such as for example fragile glass items or heavy items, such as bottles that carry significant amounts of liquid contents, or for other reasons are found unsuitable for being driven into one of the upright storage spaces <b>110</b> or <b>112</b> for elevated storing above the level of the input receiving area.

0131Although three storage chambers <b>110, 112</b> and <b>114</b> are shown on <figref idref="f0011">fig. <b>8</b></figref><b>,</b> in a practical embodiment with a rotary conveyor and sorter as depicted, only two storage chambers will be used e.g. <b>110,112; 110,114;</b> or <b>112,114</b> with the related outputs <b>224, 226; 224, 226';</b> or <b>226; 226'.</b>

0132In the layout of <figref idref="f0011">fig. <b>8</b></figref><b>,</b> the storage chamber <b>110</b> is provided with an overflow opening that provides communication to a supplementary storage chamber <b>161.</b> The facility layout shown provides a highly compact design, augmented by the use of the compact drum type conveyor means. For a person who is to deposit a returnable object/ item at the facility, there is conveniently an input receiving area <b>210</b> located as shown in the lower half of the facility. The facility includes a returnable object/ item recognition unit <b>20,</b> which can include, or be connected with a controller for controlling the operation of the conveyor <b>200.</b> The recognition unit <b>20</b> can be of an optical or acoustic type, or employ other or supplementary technology, such as magnetic, mechanical or electrical sensing to determine the type of returnable object/ item <b>10</b> that has been placed in the input receiving area <b>210,</b> or to read information or identifying features (e.g. bar-code) carried by, or located on, the item <b>10.</b> A preferred embodiment of a recognition unit is further disclosed in connection with <figref idref="f0028 f0029 f0030 f0031 f0032 f0033 f0034 f0035 f0036 f0037 f0038 f0039 f0040 f0041 f0042">figs. <b>25 - 42</b></figref><b>,</b> and <b>46.</b> In particular, with regard to the storage chambers <b>110; 112,</b> by employing a movable side wall <b>130; 132</b> or a removable storage chamber <b>114,</b> the storage chamber <b>114</b> can be extended to fill the unused space shown to appear below the first storage chamber <b>110.</b> To facilitate easier filling of the upright oriented storage chambers <b>110</b> and <b>112,</b> a deflector 180, such as is shown in <figref idref="f0009">fig. 6</figref>, can also be included.

0133<b><u style="single">Rotary Drum Tyne Conveyor Means</u></b>

0134Reference is made to <figref idref="f0012">fig. <b>9</b></figref><b>,</b> to explain the drum type conveyor of the present invention. The drum type conveyor includes a drum shaped element that is rotary about a central, longitudinal axis of rotation <b>221.</b> A substantially rectangular and elongate recess-like space or cavity, being open at the peripheral area of the drum, is provided in the drum, for holding an elongate movable element which can be retracted and advanced, the movable element having an outer surface that in the advanced position preferably becomes substantially aligned with an outer surface of the drum. In the accompanying drawings, the movable element is denoted by the numeral <b>223,</b> and the space or cavity in the drum is denoted by reference numeral <b>222.</b> The rotational capability of the drum <b>220</b> is obtained through use of bearings positioned in a region at each end of the drum, and positioned on the axis of rotation <b>221.</b> A part of the structure as shown in principle for example in <figref idref="f0011">fig. <b>8</b></figref><b>,</b> such as a cabinet, can be adapted to hold the bearings in place, thereby allowing the drum to rotate with its outer surface <b>228</b> in proximity to the input receiving area <b>210</b> which is made to coincide with an inlet opening <b>425</b> (see <figref idref="f0049">fig. <b>51</b></figref><b>)</b> in the cabinet <b>250</b> (see <figref idref="f0021">fig. <b>18</b></figref><b>), 428</b> (see <figref idref="f0049">fig. <b>51</b></figref><b>).</b> As an alternative, as shown in <figref idref="f0013">fig. <b>10</b></figref> and in other drawing figures, the drum 220 may be positioned in a frame <b>240</b> to form a conveyor assembly for easy conveyor assembly removal for convenient conveyor cleaning, test, maintenance and replacement.

0135To ensure proper alignment and good fixation of the conveyor unit when located in a storage facility according to the invention, the frame <b>240</b> is suitably adapted to match a receiving frame <b>251</b> (<figref idref="f0021">fig. <b>18</b></figref><b>)</b> that preferably is part of a cabinet <b>250</b> (<figref idref="f0021">fig. <b>18</b></figref><b>), 428</b> (<figref idref="f0049">fig. <b>51</b></figref><b>),</b> and which facilitates any of the possible layouts of a storage facility, as exemplified by several of the previous figures.

0136Preferably, as shown in <figref idref="f0013">figs. <b>10</b></figref><b>,</b><figref idref="f0017"><b>14</b></figref> or <figref idref="f0019"><b>16</b></figref><b>,</b> the moveable element <b>223</b> is driven by way of a moveable element drive means comprising a tappet or a roller <b>232,</b> being attached to the moveable element <b>223,</b> that follows a track <b>231</b> located proximal to an end of the drum and being stationary in respect of the drum. By providing a tappet or roller <b>232</b> on each side of the moveable element, made to engage with respective stationary tracks <b>231</b> located proximal to respective ends of the drum, a balanced driving force can be applied to the moveable element by the rotation of the drum. Thus, only the drum will require a drive for the assembly to operate as described here, as the moveable element will be driven by the movement of the drum relative to the stationary track. The shape of the track, i.e. the distance of the track from the axis of rotation of the drum, controls the position of the tappet or roller <b>232,</b> and, hence, the position of the moveable element, in a radial direction with respect to the drum center axis. The track is a single, continuous track <b>231</b> followed by the tappet or roller means <b>232.</b>

0137In <figref idref="f0012">fig. <b>9</b></figref><b>,</b> the drum <b>220</b> is shown in a first rotational position with the movable element in an advanced position and pointing downwards, and with a returnable object/ item <b>10</b> entered into the input receiving space or area <b>210</b> to be placed on an upward facing region of the outer circumferential surface <b>228</b> of the drum <b>220.</b> In a preferable embodiment, the drum type conveyor includes an elongate roller <b>243,</b> or other means to allow rotation of the item while keeping the item in the input receiving area, to facilitate a rotation of a returnable object/ item <b>10</b> resting on the drum surface <b>228</b> as the drum <b>220</b> is put into rotation about its axis of rotation <b>221.</b> In particular, when the returnable item is provided with a readable code for identification of the item or for providing specific information about the container, rotation of the object/ item <b>10</b> will often be required to position the part of the object/ item <b>10</b> carrying the code such that it becomes readable, for example by use of a reader or recognizing device <b>20</b> located to observe the input receiving area, as shown in <figref idref="f0011">fig. <b>8</b></figref><b>.</b> The drum type conveyor has also a guide <b>241,</b> e.g. a curved plate member, that extends from the area <b>210</b> to the output <b>224,</b> as will be further explained in connection with <figref idref="f0018">fig. <b>15</b></figref><b>.</b> Further guides <b>241,</b> e.g. as also shown on <figref idref="f0018">fig. <b>15</b></figref><b>,</b> could extend from the area 210 down to the output <b>226'.</b>

0138<figref idref="f0013">Fig. <b>10</b></figref> depicts in a perspective view the drum <b>220</b> in the first rotational position as shown in <figref idref="f0012">fig. 9</figref> and with the returnable item <b>10</b> resting on an upwardly facing part of the drum circumference. In the embodiment of <figref idref="f0013">fig. <b>10</b></figref><b>,</b> the conveyor is provided with a roller driving <b>244</b> means for driving the roller <b>243</b> in conjunction with driving of the drum, such that the surface velocity of the roller <b>243</b> is in a range of a velocity of a rolling surface <b>228</b> of the drum when rotated. Preferably, the roller driving means <b>244</b> comprises a gear drive arrangement that mechanically provides a rotation of the roller <b>243</b> by the rotation of the drum <b>220.</b> Movement in an axial direction of a returnable object/ item <b>10</b> being positioned in the input receiving area and resting on the drum <b>220</b> and roller <b>243</b> is in part restricted by end walls <b>229</b> associated with and located at each end of the drum <b>220,</b> and in part by elements <b>242</b> that constitute the frame <b>240.</b> Depending on the design of the means for driving the movable piston-like element <b>221</b> between its retracted position and its advanced position, the conveyor shown in <figref idref="f0013">fig. <b>10</b></figref> can be provided with a single output <b>224,</b> corresponding to only one particular angular drum rotary position, or with a second output at a different angular rotary position of the drum.

0139In <figref idref="f0014">fig. <b>11</b></figref><b>,</b> the drum <b>220</b> is shown in a second rotational position with the space or cavity opening in the drum facing the input receiving area, and with the movable element <b>223</b> moved to the retracted position. This has thereby allowed the returnable object/ item <b>10,</b> shown in <figref idref="f0012">fig. <b>9</b></figref> as resting on the circumferential drum surface <b>228,</b> to fall into the recess-like space or cavity <b>222,</b> as the drum is rotated to arrive at the second position after rotation from the first position, and be contained by the drum <b>220.</b> The same situation is also shown in the perspective view of <figref idref="f0015">fig. <b>12</b></figref><b>,</b> which shows parts of interior side walls of the space <b>222</b> and the drum end walls <b>229,</b> which contribute to restrict a movement of the returnable object/ item <b>10</b> such that it may not go beyond the space provided by the cavity <b>222.</b>

0140In <figref idref="f0016">fig. <b>13</b></figref><b>,</b> a partial sectional view of the drum type conveyor shows the drum in a third angular position, where the movable element has been moved in a first and counter-clockwise direction from the retracted position shown in <figref idref="f0014">figs. <b>11</b></figref> and <figref idref="f0015"><b>12</b></figref> to an advanced position to drive the returnable item to the first output <b>224,</b> preferably for the purpose of driving the object/ item <b>10</b> towards the in-feed opening of a storage chamber <b>110.</b> If driven in a second and clockwise direction to a second output, which is either output <b>226</b> or output <b>226',</b> but not both, in-feed to a respective storage chamber <b>112</b> or <b>114</b> could be envisaged. The drum type conveyor is provided with said guide <b>241</b> to restrict the item <b>10</b> to its location in the cavity <b>222</b> while the drum is being rotated from the second position with the space <b>222</b> facing the input receiving area <b>210</b> to the third angular position where the opening of the cavity <b>222</b> is facing the first output <b>224.</b> The same situation is also shown in perspective view <figref idref="f0017">fig. <b>14</b></figref><b>,</b> with the opening of the cavity <b>222</b> aligned with the first output <b>224</b> and with the movable element <b>223</b> in an advanced position.

0141In <figref idref="f0018">fig. <b>15</b></figref><b>,</b> a partial cross sectional view of the drum type conveyor shows the situation based on the situation shown in <figref idref="f0014">fig. <b>11</b></figref><b>,</b> now with the drum rotated in a second and opposite rotational direction (clockwise direction in the example), whereby the returnable object/ item <b>10</b> that was received in the space or cavity <b>222</b> when the drum was in its second rotational position has been carried by the drum through a rotation of the drum through approximately 180° so that the drum assumes its first position as shown on <figref idref="f0012">figs. <b>9</b></figref> and <figref idref="f0013"><b>10</b></figref><b>.</b> The object/ item is driven out from the space <b>222</b> by the movable element <b>223</b> moving from a retracted position to an advanced position, but also by the effect of gravity. A guide <b>241</b> is provided to restrict the movement of the object/ item 10 when held in the space <b>222</b> while the drum is being rotated from the second rotational position with the space facing the input receiving area <b>210</b> to the first rotational position with the opening of the space <b>222</b> and the curved face <b>223'</b> of the element <b>223</b> being in register with the output <b>226'.</b> The situation of <figref idref="f0018">fig. <b>15</b></figref> is also shown in the perspective view from below of <figref idref="f0019">fig. <b>16</b></figref><b>,</b> with the item <b>10</b> exiting from the conveyor at the alternative output <b>226'.</b>

0142For conveying an item <b>10</b> that has entered the recess-like space or cavity to one out of two possible outputs in a specific embodiment of the combined drum conveyor and sorter, different directions of rotation can be used. For example, in the embodiments shown in <figref idref="f0012 f0013 f0014 f0015 f0016 f0017 f0018 f0019">figs. <b>9 - 16</b></figref> of the accompanying drawings, the drum would be rotated in a first direction (e.g. counter-clockwise, as shown) to deliver the item at the first output 224, while a rotation in a second direction (e.g. clockwise, as shown) would be applied to the drum for delivering the item 10 at a second output 226 or 226'.

0143Thus, in the present context, there are in effect four main rotary positions of the drum 220: <ol id="ol0001"><li>a) the first rotary position with the recess <b>222</b> and the element <b>223</b> facing downwards;</li><li>b) the second rotary position with the recess <b>222</b> and the element <b>223</b> facing upwards, thus facing the input receiving area,</li><li>c) the third rotary position with the recess 222 and the element 223 facing the first output 224, and</li><li>d) the fourth rotary position with the recess 222 and the element 223 facing the second output 226 or facing the alternative second output 226'. If facing output 226', the fourth rotary position will in effect be the same as the first rotary position.</li></ol>

0144Now, with reference to <figref idref="f0020">figs. 17</figref>, <figref idref="f0021">18</figref> and <figref idref="f0022">19</figref>, a load cell arrangement for determining a mass of a returnable item positioned on the drum type conveyor of the invention will be explained. When positioned to rest on the drum 220 or when rotating the drum 220 to spin the item 10, the item 10 will also in part be resting on or rotating with the roller 243, if such roller 243 is provided. Reference is also made to <figref idref="f0012">fig. 9</figref> to see how the object/ item 10 will be resting against the roller 243. For making a decision as to whether or not to accept the object/item 10 for storage in the facility according to the invention or to determine an appropriate storage chamber in an embodiment having multiple storage chambers, the mass of the object/item 10 should be determined. To facilitate a mass determination, the roller 243 is provided with at least one bearing 245 support the roller shaft 247 at one end of the roller, which bearing 245 is connected to and supported by a load cell 246. In the exemplary embodiment shown in <figref idref="f0020">fig. 17</figref>, the load cell 246 is attached to a frame 240 for the conveyor, while a further bearing 248 is provided at an opposite end of the roller.

0145A second and alternative embodiment of a load cell arrangement of <figref idref="f0020">fig. 17</figref> for determining a mass of a returnable object/ item 10 resting on the roller 243 is depicted on <figref idref="f0021">fig. 18</figref>. The arrangement includes a bearing 252 to be applied to one end of the roller shaft 247 when the conveyor is positioned in a cabinet 250. In this particular embodiment, the shaft 247 is partly free to move about in a plane perpendicular, suitably vertically, relative to the roller's 243 axis of rotation, and with the bearing 252 applied to the end part of the shaft 247 of the roller <b>243</b> after positioning the drum type conveyor in the cabinet <b>250. 251</b> denotes an electrical connection to the load cell <b>253.</b> Thus, in <figref idref="f0021">fig. <b>18</b></figref><b>,</b> the removable bearing <b>252</b> and its associated load cell <b>253</b> is shown in a detached position, while, in <figref idref="f0022">fig. <b>19</b></figref><b>,</b> the cabinet arm <b>250'</b> holding the bearing <b>252</b> has been relocated to a position where the bearing <b>252</b> engages the bearing receiving end of the roller shaft <b>247</b> to provide a bearing with a load cell <b>253</b> referenced to the cabinet <b>250</b> or to the frame <b>240.</b> The embodiments of <figref idref="f0020 f0021 f0022">fig. <b>17 - 19</b></figref> are particularly advantageous to avoid as far as possible the risk that remaining liquid contents in returnable objects/ items <b>10</b> that are positioned on top of the conveyor typically can be spilled, as such spillage will likely require more frequent removal of the conveyor assembly from the cabinet than normally for cleaning away spilling of such unwanted liquid. Also, the use of the load cell prevents an RVM user from being successful with a swindle attempt by entering a full, unopened beverage container into the receiving area and place on top of the drum. The detection system <b>20</b> (see <figref idref="f0011">fig. <b>8</b></figref><b>)</b> will - as to be explained later - according to predetermined data determine that a specific observed and recognized item should have a specific weight or weight range. If the item is a full beverage can or bottle, the RVM will determine that there is a potential swindle situation and may trigger an alarm. Furthermore, in the embodiment shown, the drive means for operating the conveyor is separable from the drum type conveyor itself (as will be explained later) , such that, by removing the conveyor from the storage facility assembly, the load cell will remain at the facility (i.e. located on the cabinet arm <b>250')</b> and thus be protected from being subject to possibly harmful cleaning agents and water that typically would be used for cleaning the conveyor. If the load cell is located on the frame <b>240</b> of the conveyor, as depicted on <figref idref="f0020">fig. <b>17</b></figref><b>,</b> special measures must be taken to ensure that the load cell is not damaged in any washing or cleaning operation of the conveyor <b>200.</b> Thus the embodiment of <figref idref="f0021">figs. <b>18</b></figref> and <figref idref="f0022"><b>19</b></figref> would be the preferred embodiment.

0146<b><u style="single">Plunger-type conveyor means</u></b>

0147In the following, a piston-like moveable plunger in a stationary housing-type of conveyor part of the present invention will be explained.

0148Reference is first made to <figref idref="f0023">fig. <b>20</b></figref><b>,</b> which in principle shows a first embodiment of a substantially linearly moveable plunger in a stationary housing type conveyor, as comprising an elongated housing <b>260</b> with an input opening <b>262</b> on one side adapted to face the input receiving area <b>210</b> of the storage facility, an interior space <b>261,</b> a substantially linearly movable plunger or slide member <b>270,</b> a first output <b>263</b> and a second output <b>264.</b> Although exemplified here with a housing based on a straightforward design for a rectilinear movement of the plunger, the housing may be designed to be curved in any direction to allow an output in an arbitrarily chosen angle. With a housing having a curved shape, naturally, the plunger would follow a curved path corresponding to the shape of the housing. Also shown in <figref idref="f0023">fig. <b>20</b></figref><b>,</b> is an elongated slot <b>272</b> in one side of the housing, which is provided as an access means for allowing a plunger drive means (not shown) to be attached to the plunger <b>270</b> for positioning of the plunger in different parts of the interior space <b>261.</b> Such a slot can be provided at any longitudinally extending side of the housing, and also at more than one side to provide a balanced drive force to the plunger. In <figref idref="f0023">fig. <b>20</b></figref> is also shown a returnable object/ item <b>10</b> which has been positioned in the input receiving area, and which by the aid of gravity and the provision of the input opening <b>262</b> will fall into the interior space <b>261</b> of the housing, and thereby become located adjacent to the plunger <b>270</b> when the plunger initially has been positioned in a first position which is below the opening <b>262.</b>

0149In a preferred embodiment of the conveyor and sorter of the present invention, as shown on <figref idref="f0023">figs. <b>20</b></figref> and <figref idref="f0024"><b>21</b></figref><b>,</b> embodying the moveable plunger in a stationary housing type conveyor, the conveyor suitably includes an item turning device, preferably using at least one roller <b>273</b> or preferably two rollers <b>273, 273'</b> if two outputs <b>263, 264</b> are two be used. The device is located adjacent the input opening <b>262.</b> The upper side face <b>271</b> of the plunger, i.e. the side of the plunger that will be facing the input opening <b>262,</b> has a surface structure that is specially prepared to provide good friction against a returnable object/ item <b>10</b> that has been deposited in the input receiving area and brought to rest on the upper side face <b>271</b> of the plunger. A rotation of the object/ item <b>10</b> that rests on the upper side face <b>271</b> of the plunger <b>270</b> is then obtainable by movement of the plunger <b>270</b> while the object/ item <b>10</b> is resting on top of the plunger <b>270,</b> which rotation is further augmented by the rollers <b>273, 273'.</b> The rollers <b>273, 273'</b> also cause the object/ item <b>10</b> to not move away from the opening <b>262</b> while rotated or if the longitudinal axis <b>260'(see</b><figref idref="f0024">figs. <b>21</b></figref> and <figref idref="f0026"><b>23</b></figref><b>)</b> of the housing forms an angle with the horizontal. The upper side face <b>271</b> of the plunger <b>270</b> can be extended in any direction of movement of the plunger <b>270,</b> to obtain a desired range of turning of the item 10 that rests on the upper side face <b>271</b> of the plunger <b>270.</b> Although just one roller <b>273</b> may suffice, a preferred embodiment of the plunger type conveyor and sorter has two rollers <b>273, 273',</b> one at each side of the input opening <b>262,</b> to facilitate rotation of the item <b>10</b> in any direction in connection with a movement of the plunger <b>270</b> in the longitudinal direction of the housing <b>260.</b> The rollers are rotatably supported at each end by mountings <b>275.</b> The rollers <b>273; 273'</b> can be freely rotatable, or they can be driven by a driver arrangement <b>274</b> by way of a separate drive means or by a linkage to the plunger <b>270</b> or the driver for the plunger. Preferably, but not necessarily, the drive means <b>274; 274',</b> e.g. a motor inside the roller, is arranged such that a surface velocity of the roller <b>273</b> during its rotation is about the same as the surface velocity of the upper face <b>271</b> of the plunger <b>270,</b> relative to the housing <b>260</b> as the plunger <b>270</b> is moved in the housing <b>260.</b> In order to obtain a measure for the mass of a returnable object/ item <b>10</b> resting on the plunger <b>270,</b> any roller arrangement <b>273</b> can include a load cell <b>276</b> suitably supporting the roller at one end thereof in order to measure a reaction force exerted on the roller as a function of an acceleration or turning of the object/ item <b>10</b> due to movement of the plunger <b>270,</b> or a reaction force due to the weight of the item <b>10,</b> in particular if longitudinal axis of the housing <b>260</b> is made to tilt, e,g. in the range of ± 0° - 30° relative to the horizontal..

0150In a next step of operation of the linear movement type conveyor, when the upper face <b>271</b> of the plunger has moved away from the opening <b>262</b> either towards output <b>263</b> or <b>264,</b> the returnable object/ item <b>10</b> will enter into the interior space <b>261,</b> the plunger <b>270</b> will then upon movement in an opposite direction apply a driving force to the object/ item <b>10</b> to drive it towards and through e.g. the first output <b>263</b> if the plunger at first had moved away from the opening <b>262</b> towards output <b>264,</b> or towards and through e.g. the second output <b>264</b> if the plunger had at first moved away from the opening <b>262</b> towards output <b>263.</b> In either case the plunger <b>270</b> would preferably force the item , towards an in-feed opening <b>140</b> (see <figref idref="f0003">fig. 2a</figref>) or an in-feed opening <b>141</b> or <b>142</b> (see <figref idref="f0009">fig. 6</figref>) of a storage chamber of a storage facility as disclosed herein.

0151Now, with reference to <figref idref="f0025">figs. <b>22</b></figref><b>,</b> a further variant of the conveyor and sorter of the type having the moveable plunger in a stationary housing will be explained, this embodiment exhibiting three outputs. In this variant, at least three positions for the plunger element in the housing are defined, namely with the plunger positioned immediately under the input opening <b>262,</b> with the plunger positioned toward a first output <b>263</b> in the first movement direction of the plunger <b>270,</b> and a further position where the plunger has been moved near a second output <b>264.</b> For the sake of clarity, the rollers <b>273, 273'</b> have not been shown on <figref idref="f0025">fig. <b>22</b></figref><b>,</b> but the rollers will preferably be present in a practical embodiments. The variant shown in <figref idref="f0025">fig. <b>22</b></figref> includes a third output <b>265</b> of the housing, the third output being located opposite to and below the input opening <b>262</b> in the bottom of the housing <b>260.</b> Preferably, the third output <b>265</b> includes a closing means <b>265'</b> which is shown on <figref idref="f0026">fig. <b>23</b></figref><b>,</b> but not on <figref idref="f0025">fig. <b>22</b></figref><b>.</b> The closing means <b>265</b> is capable of controllably blocking the output <b>265</b> such that an object/item 10 that has entered the interior space <b>261</b> of the housing <b>260</b> selectively can be kept from exiting the housing through the output <b>265</b> if the object/ item <b>10</b> is instead to be directed towards a different output, e.g. output <b>263</b> or <b>264.</b> The means <b>265'</b> for selectively closing the third output <b>265</b> can be made operational by way of a separate driver or actuator <b>265",</b> e.g. a solenoid, or by a linkage to the plunger <b>270,</b> for example by placing the output in an open state when the plunger is placed in an extreme position within the housing, such as for example in connection with a movement of the plunger beyond the position of the plunger <b>270</b> as shown in e.g. on <figref idref="f0025">fig. <b>22</b></figref><b>.</b> By the depositing of an object/ item <b>10</b> in the input receiving area <b>210</b> immediately above the input opening <b>262,</b> and with the third output <b>265</b> in an open state, and by locating the plunger <b>270</b> in a position where it does not block a passage provided between the input <b>262</b> and the third output <b>265</b> by the interior space <b>261</b> of the housing, the object/ item <b>10</b> is allowed to pass through the opening <b>262,</b> the interior of the housing <b>260</b> and then exit through the opening <b>265.</b> The exit of the item <b>10</b> after having traveled straight through the housing from the input <b>262</b> to the output <b>265</b> is shown in <figref idref="f0025">fig. <b>22</b></figref><b>.</b>

0152<figref idref="f0027">Fig. <b>24</b></figref> illustrates how the plunger <b>270</b> may be used to rotate the object / item <b>10.,</b> e.g. a bottle, by moving the plunger either way, the rollers <b>273, 273'</b> assisting a safe and efficient rotation of the item <b>10.</b> The understanding of <figref idref="f0027">fig. <b>24</b></figref> as regards rotation of the item 10 before it enters into the interior <b>261</b> of the housing <b>260</b> will be the same, irrespective of the presence of the output <b>265.</b> In effect, the three-outputs embodiment could be made instead as a two-outputs embodiment, having e.g. outputs <b>263</b> and <b>264,</b> outputs <b>263</b> and <b>265</b> or outputs <b>264</b> and <b>265.</b>

0153<b><u style="single">Single Camera Viewing Device</u></b>

0154<figref idref="f0028">Fig. <b>25</b></figref> depicts a first light source <b>300</b> and a second light source <b>301,</b> the light source <b>301</b> suitably consisting of a plurality of light sub-sources <b>302, 303, 304, 305.</b> The light sources 300 and 301 are separately configured to illuminate a first region <b>306</b> and a second region <b>307</b> of an object, e.g. a returnable item <b>10;10';10",10"'.</b> A single camera <b>308</b> is provided to view at least part of the regions <b>306</b> and <b>307.</b> The first light source <b>300</b> is configured to assist the camera <b>308</b> in viewing of contour of objects, items or articles <b>10, 10', 10", 10"'</b> of different cross section , e.g. empty beverage packaging such as cans and bottles against a light reflective area or background <b>313</b> forming a bright, light emitting background. The light from the first light source <b>300</b> is directed towards the object (e,g. one of those labeled <b>10</b> through <b>10"')</b> as parallel light using a lens <b>314.</b> The second light source <b>301</b> is configured to assist camera viewing by the camera <b>308</b> for detection and recognition of any identity features located on the object in viewing sector labeled <b>315.</b>

0155Said identity features are suitably at least one of: bar code, graphic symbol and alphanumeric characters.

0156Although it would be feasible to use two cameras instead of a single camera, the use of a single camera yields less technical complexity, a simpler and more maintenance friendly structure, in addition to requiring less space in order to carry out the required functions. Further, from a components cost aspect and installation cost, the invention also offers a substantial advantage over a two-camera solution.

0157When a camera views e.g. an object contour or identifying features thereon, the camera sensor matrix provides a string of matrix pixel signals to be processed in order to identify or recognize such contour or features, including the possibility of letting the camera read and causing identification of e.g. a bar code.

0158As seen from <figref idref="f0028 f0029 f0030 f0031">figs. <b>25 -28</b></figref><b>,</b> the first light source <b>300</b> illuminates the first region <b>306</b> via a light path which includes an optical beam splitter (or view splitter) <b>316</b> (<figref idref="f0028">figs. <b>25</b></figref> and <figref idref="f0029"><b>26</b></figref><b>), 318</b> (<figref idref="f0030">fig. <b>27</b></figref><b>)</b> or <b>319</b> (<figref idref="f0031">fig. <b>28</b></figref><b>),</b> at least one inclined mirror <b>320</b> and the lens <b>314.</b> However, it is noted that in the most preferred versions, there is suitably used two mirrors <b>320</b> and <b>321,</b> as shown on <figref idref="f0028 f0029 f0030">figs. <b>25 - 27</b></figref><b>,</b> in the light path.

0159<figref idref="f0028">Figs. <b>25</b></figref><b>,</b><figref idref="f0029"><b>26</b></figref> and <figref idref="f0031"><b>28</b></figref> depict a light beam splitter <b>316; 319</b> located in an inclined posture in the camera field of view <b>322</b> and covers at least part of said field of view , suitably approximately half of the camera field of view. <figref idref="f0030">Fig. <b>27</b></figref> depicts an optical beam splitter <b>318</b> which covers the complete camera field of view.

0160It is seen from <figref idref="f0028 f0029 f0030 f0031">figs. <b>25 - 28</b></figref> that camera viewing of the first region <b>306</b> via one mirror <b>320</b> or two mirrors <b>320, 321</b> is suitably made with line of sight towards the object shifted by an angle <b>α</b> of 90°±30° relative to camera line of sight towards the object when viewing the second region <b>307.</b> In the drawing <figref idref="f0028 f0029 f0030 f0031">figs. <b>25 - 28</b></figref> the angle <b>α</b> is shown as 90°. However, by arranging the mirrors <b>320, 321</b> differently, it is evident that the angle range of 90°± 30° is possible.

0161In the case that there is used an optical beam splitter <b>316</b> or <b>319</b> which is within only half or less of the camera field of view, there is the possibility that when the camera is set to view the second region or part thereof, the splitter is suitably assisted by a vision blocker <b>323;</b> 324 to prevent the camera from viewing both directly in the sector <b>315</b> and through the splitter, the splitter providing a less clear viewing. If the vision blocker <b>323; 324</b> is omitted, then the camera will be able to view the entire region <b>307.</b>

0162<figref idref="f0030">Fig. <b>27</b></figref> shows the camera in a configuration set to view the second region <b>307</b> completely via the beam splitter <b>318.</b> This implies that the camera <b>308</b> views either the first region <b>306</b> via the splitter, the mirrors <b>321, 320</b> and the lens <b>314,</b> and secondly the second region <b>307</b> through the splitter. In this latter situation, the light source <b>301</b> is fully or partly activated, and the light source <b>300</b> is deactivated.

0163The light source <b>301,</b> suitably comprising a plurality of light sub-sources <b>302 - 305,</b> is notably located in a region between the beam splitter <b>316; 318; 319</b> and an object supporting means in the form of said compact conveyor and sorter <b>200.</b> In the embodiments shown on <figref idref="f0028">fig. <b>25</b></figref><b>,</b><figref idref="f0031"><b>28</b></figref><b>-30,</b> the object supporting means <b>200</b> is shown only schematically, but in more detail on <figref idref="f0029">fig. <b>26</b></figref><b>.</b> A more detailed operation of the object supporting means <b>200</b> and a possible, schematically shown alternative on <figref idref="f0035">fig. <b>32</b></figref><b>,</b> is disclosed in the preceding disclosure of <figref idref="f0002 f0003 f0004 f0005 f0006 f0007 f0008 f0009 f0010 f0011 f0012 f0013 f0014 f0015 f0016 f0017 f0018 f0019 f0020 f0021 f0022 f0023 f0024 f0025 f0026 f0027">figs. <b>1- 24</b></figref><b>.</b>

0164It will now be briefly highlighted some of the earlier disclosed features of the object supporting means <b>200</b> in a specific context of camera aided viewing of an object, e.g. the object <b>10,</b> located on the object supporting means <b>200,</b> said supporting means is in the form of the rotary drum <b>220</b> (see <figref idref="f0029">fig. <b>26</b></figref><b>)</b> with the auxiliary roller <b>243.</b> The drum <b>220</b> and the roller 243 will controllably, but forcibly rotate the object <b>10</b> on a portion <b>220'</b> or <b>220"</b> of the circumference of the drum. The drum <b>220</b> has at least one radial inwardly directed, adjustable space or cavity <b>222</b> for receiving the object <b>10</b> after its rotation on said circumference portion and for transporting the object <b>10</b> through rotation of the drum to an output location, e.g. at generally indicated by arrows <b>224, 226</b> and <b>226' .</b> The camera <b>308</b> will be able to view and cause detection of the presence of the object <b>10</b> when it has dropped into the adjustable space <b>222.</b> This has a safety function aspect and also a security function aspect., i.e. to prevent any swindle attempt. This means that the drum <b>220</b> will not start turning until the camera <b>308</b> actually observes and causes detection of the object being present in the space <b>222</b> and with the movable element <b>223</b> operating as a movable bottom in its fully retracted state.

0165The direction which the drum will then turn is determined by set criteria which are compared to recognize characteristic features of the object. This will be more fully explained and considered in connection with the disclosure of <figref idref="f0040">fig. <b>38</b></figref><b>.</b> Further, in case the contour of the object is to be viewable from above, rather than sideways, it would be advantageous to let at least a part of the rotary drum <b>220</b> be provided with a coating which is retro-reflective to light, in particular at the portions labeled <b>220'</b> and <b>220"</b> of the drum <b>220.</b> Such a situation is in particular suitable in connection with the embodiment shown on <figref idref="f0032">fig. <b>29</b></figref> and will be further explained later.

0166A brief repeated disclosure is now made of the alternative supporting means as shown on <figref idref="f0023 f0024 f0025 f0026 f0027">figs. <b>20 - 24</b></figref> in the context of camera aided viewing of an object <b>10.</b> The single camera is generally denoted by <b>308, 308',</b> the reference <b>308'</b> symbolizing viewing by the camera <b>308</b> via e.g. a beam splitter <b>318</b> and mirrors <b>321, 320</b> (see <figref idref="f0030">fig. <b>27</b></figref><b>).</b> Said supporting means is suitably in the form of the housing <b>260</b> forming a guide with an object receiving input opening <b>262</b> and a reciprocating plunger or <b>270</b> therein. There is suitably at one or both of two longitudinal sides of the opening <b>262</b> an auxiliary roller <b>273; 273'</b> for roller support upon rotation of the object or item <b>10; 10'; 10"; 10"'</b> on the plunger <b>270</b> when it is set to move with its upper surface <b>271</b> past said opening, thus enabling the camera <b>308</b> to read an identifying feature on the object or item <b>10</b> if not immediately viewable by the camera. The plunger <b>270</b> is controllable to move beyond said opening <b>262,</b> e.g. to the position shown by dotted lines <b>270"</b> to allow the object to drop into the interior of the housing <b>260</b> through said opening <b>262</b> and by return movement of the plunger <b>270</b> (towards left as shown on <figref idref="f0035">fig. <b>32</b></figref><b>)</b> causing the object to be pushed out of the housing to an output location <b>263.</b> From the understanding and concept depicted in connection with the supporting means <b>200</b> on <figref idref="f0029">fig. <b>26</b></figref><b>,</b> it is readily appreciated that the object <b>10</b> is camera observable while at a location inside said housing <b>260</b> below said opening <b>262,</b> provided that such location is in at least part of a field of view of the camera <b>308.</b> In a particular embodiment, at least at the upper part <b>271</b> of the plunger <b>270</b> can be provided with a coating retro-reflective to light, thus enabling the contour of the object, e.g. <b>10,</b> to be viewed from above.

0167<figref idref="f0032">Fig. <b>29</b></figref> shows the use of a single camera <b>340</b> and with an optical beam splitter <b>341</b> inclined relative to a lens <b>343.</b> A light source <b>342</b> provides for illumination of the object, e.g. 10, through lens <b>343</b> to provide parallel light rays towards the supporting means <b>200,</b> which has its drum parts <b>220'</b> and <b>220"</b> (see <figref idref="f0029">fig. <b>26</b></figref><b>)</b> provided with retro-reflective material or property enabling light not hit by the object to be retro-reflected back to camera <b>340</b> via the lens <b>343</b> and the splitter <b>341</b> to provide an image of the contour of the object. When it is desirable to view and read identifying features on the object, such as e.g. bar-code, a light source <b>344</b> is activated, the light source suitably being of the same type as the light source 301. At the same time, light source <b>342</b> may be deactivated, if required.

0168<figref idref="f0033">Fig. <b>30</b></figref> shows an embodiment which in operation is similar to that of <figref idref="f0032">fig. <b>29</b></figref><b>.</b> A single camera <b>345</b> is used with an optical beam splitter <b>346</b> inclined relative to a lens <b>347.</b> A light source <b>348</b> provides for illumination of the object, e.g. <b>10,</b> through lens <b>347</b> to provide parallel light rays towards a light reflective background or area <b>313</b> enabling light not hit by the object to be retro-reflected back to camera <b>345</b> via the lens <b>347</b> and the splitter <b>346</b> to provide an image of the contour of the object. When it is desirable to view and read (or detect) identifying features on the object, such as e.g. bar code, a light source <b>349</b> is activated, the light source suitably being of the same type as the light source <b>344,</b> i.e. comprising a plurality of light sub-sources. At the same time the light source <b>349</b> is activated, light source 348 may be deactivated, if required. <figref idref="f0034">Fig. <b>31</b></figref> is a modification of the embodiment of <figref idref="f0033">fig. <b>30</b></figref><b>,</b> the major difference being the non-existence of the lens <b>347,</b> thus yielding that the object contour is not viewed by means parallel light rays.

0169<figref idref="f0028 f0029 f0030 f0031">Figs. <b>25 -28</b></figref> clearly demonstrate that the first and second regions <b>306, 307</b> are partly overlapping, and <figref idref="f0032 f0033 f0034">figs. <b>29 - 31</b></figref> indicate full overlapping.

0170<figref idref="f0036">Fig. <b>33</b></figref> is identical to the embodiment shown on <figref idref="f0028">fig. <b>25</b></figref><b>,</b> apart from the light source 300 and the retro-reflective background <b>313</b> having been deleted and replaced by a light emitting, illuminated or backlit panel <b>350,</b> the panel <b>350</b> thus forming a bright background. Ambient light may in some applications be sufficient in order that the camera views a bright background.

0171The panel <b>350</b> will provide the bright background against which e.g. the object 10 is to be viewed by the single camera <b>308.</b>

0172A similar situation is present with the embodiment of <figref idref="f0037">fig. <b>34</b></figref><b>,</b> which is identical to the embodiment shown on <figref idref="f0030">fig. <b>27</b></figref><b>,</b> apart from the light source <b>300</b> and the retro-reflective background area <b>313</b> having been deleted and replaced by a light emitting area, suitably in the form of the panel <b>350</b> to form a bright background against which e.g. the object <b>10</b> is to be viewed by the single camera <b>308</b> to provide for e.g. detection of object contour.

0173The further embodiments depicted on <figref idref="f0038">fig. <b>35</b></figref> and <figref idref="f0039"><b>36</b></figref> are also related to the use of a light emitting panel 350 to form said bright background and against which camera viewing of an object can be made, as will be further explained.

0174<figref idref="f0038">Fig. 35</figref> is a modification of the embodiments of <figref idref="f0033">fig.<b>30</b></figref><b>.</b> It is noted that the lens <b>353,</b> which is suitably of same type as lens <b>347</b> in <figref idref="f0033">fig. <b>30</b></figref> or lens <b>314</b> in other drawing figures, is present in order to let a single camera <b>356</b> view and detect object contour, e.g. contour of object <b>309</b> against the panel <b>350</b> which in this embodiment constitutes the first light source. The second light source is that labeled <b>349,</b> which could be constituted by two or more light sub-sources. The camera <b>356</b> uses the lens <b>347</b> to enable viewing through use of parallel rays, in order to get as accurate contour image of the object as possible. The light source <b>349</b> is activated when the camera is to view and read identity features, like e.g. bar code <b>309',</b> located on the object. Suitably, panel <b>350</b> is then not exhibiting a light emitting surface or background area, or its light emitting intensity could suitably be reduced. Other structural details shown on <figref idref="f0038">fig. <b>35</b></figref> will be further explained later with reference to <figref idref="f0040">fig. <b>39</b></figref><b>.</b>

0175<figref idref="f0039">Fig. <b>36</b></figref> is an embodiment with a single camera <b>358</b> which is capable of viewing an object, e.g. an empty beverage bottle or can <b>10;10'; 10"</b> or <b>10"'</b> against a light emitting background area, such as the panel <b>350</b> as described earlier. In order for the camera <b>358</b> to view and read identifying features located on the object, e.g. a bar-code <b>10""</b> on object <b>10,</b> it is preferable to use a second light source <b>359.</b> When the light source <b>359</b> is activated, it would be preferable, though not essential, to reduce light intensity from the panel <b>350</b> or even turn off emission of light from the panel <b>350.</b> The light source <b>359,</b> which is similar or identical to the light source <b>349,</b> could be constituted by two or more sub-sources.

0176From a viewing of <figref idref="f0036 f0037 f0038 f0039">figs. <b>33 - 36</b></figref> it will be appreciated that turning of the object to be inspected, e.g.. to suitably find an identifying feature to be detected, is made by means of the object supporting means <b>220, 220, 243</b> or <b>260, 262, 270, 271, 273, 273'</b> as shown on in more detail on <figref idref="f0029">figs. <b>26</b></figref> and <figref idref="f0035"><b>32</b></figref><b>,</b> respectively.

0177Further, it could be of advantage to let the first and second light sources, e.g. <b>300, 301; 300', 301; 342, 344; 348, 349; 350, 301; 350, 354; 350, 349; 350, 359</b> have different spectral range or composition. Also, it would be possible to have the second light sources <b>301; 344; 349; 359</b> composed of two or more sub-sources. Further, the sub-sources could have different spectra range or composition, either all different, different in pairs or in groups. Such features of the light sources and possible sub-sources are of importance to be able to detect e.g. identifying features on the objects appearing e.g. with different colours, different reflective properties etc.

0178Further aspects of the invention are now to be explained with reference to <figref idref="f0040 f0041">fig. <b>37</b></figref><b>.</b> In the particular case of the embodiments of <figref idref="f0028">figs. <b>25</b></figref><b>,</b><figref idref="f0029"><b>26</b></figref> and <figref idref="f0031"><b>28</b></figref><b>,</b> as well as <figref idref="f0036">fig. <b>33</b></figref><b>,</b> it would be suitable to split the camera video image in two with a part <b>360</b> related to the first region <b>306</b> and another part <b>361</b> related to the second region <b>307.</b> In the embodiments of <figref idref="f0030">figs. <b>27</b></figref> and <figref idref="f0037"><b>34</b></figref> it may be visualized the possibility of dedicating half of the camera video image to region <b>306</b> and the other half to region <b>307,</b> or alternatively have alternating full video images of regions <b>306</b> and <b>307.</b> For the embodiments of <figref idref="f0032">figs. <b>29</b></figref><b>,</b><figref idref="f0033"><b>30</b></figref> and <figref idref="f0039"><b>36</b></figref> the choice is alternating full video images only.

0179Camera viewing of the first region of the object <b>362</b> related to its contour <b>363</b> can in addition include observation or rather recognition of mere presence or absence of said identifying features <b>364,</b> e.g. bar code located on the object.

0180The focus of the camera will not be exactly on the features <b>364,</b> but the camera will at least sense or detect with relation to the partial image <b>360</b> whether the features <b>364,</b> here labeled <b>364'</b> are indeed present or not, although on the partial image <b>360</b> appearing "blurred" or a bit out of focus. If the features <b>364</b> are not visible on the image part <b>361,</b> but visible on part <b>360,</b> this will indicate necessity to rotate the object one way or the other through a maximum angle of 180°. The comparison between the two images <b>360</b> and <b>361</b> in this respect has some impact on the required amount of rotation of the object in order to be able to view and read the feature <b>364</b> properly in region <b>307,</b> and consequently has also importance with regard to processing time in order to find the feature <b>364,</b> read and record it.

0181When using in this manner a single camera for camera viewing of both said first and second regions, the camera has preferably, but not necessarily its image field subdivided into said at least two partial images <b>360, 361,</b> the first partial image <b>360</b> being dedicated to object contour detection and/ or detection of presence or absence of said identifying features, and the second partial image <b>361</b> being dedicated to observation and reading of said identifying features.

0182It is readily understood that the principle of detecting presence or absence of identifying features in region <b>306</b> and the need for rotation of the object is equally well useful when the camera switches between viewing regions <b>306</b> and <b>307.</b>

0183<b><u style="single">Operational Safety Means</u></b>

0184As indicated in the introductory part of the specification it is important also to focus on safety aspects when using an apparatus as extensively disclosed in the present specification and on the drawings, in particular to avoid injury to persons operating the apparatus or to avoid functional breakdown or jamming of the apparatus.

0185Therefore, the invention is in this aspect focused on implementation of safety measures which are provided from actions obtained by operating a hardware circuit which is adapted to read predefined or dedicated pixels on the sensor matrix of the camera, i.e. reading hardware assigned physical pixels of the camera sensor matrix when a camera image is made.

0186This will yield a reliable safety measure related to possible operational hazards, thus e.g. preventing a motor from operating through halting its rotation or removing current supply thereto to thereby remove its torque.

0187This aspect of the invention is therefore through use of camera functionality able to provide an efficient hardware implemented light curtain functionality, as will be more closely explained in the following description with reference to <figref idref="f0040">figs. <b>37a</b></figref><b>,</b><figref idref="f0041"><b>37b</b></figref><b>,</b><figref idref="f0041"><b>37c</b></figref><b>,</b><figref idref="f0042"><b>40a</b></figref><b>,</b><figref idref="f0042"><b>40b</b></figref> and <figref idref="f0044"><b>46</b></figref><b>.</b>

0188In the present embodiment there is used a camera image , such as e.g. image <b>360</b> or 385 for detection of so-called "border crossing", i.e. an event in a field of view of the camera.

0189As indicated above, it is important to provide for personnel or an operator (e.g. a supermarket customer) operational safety of an apparatus , e.g. a reverse vending machine, and also protect in such apparatus machinery, having movable parts, against externally created interference that could cause operational damages or personal injuries, or operational or personal hazard. With a light curtain functionality it is possible to disable operation or stop the machinery altogether immediately and inhibit further operation until the cause of such operational disruption has been attended to.

0190With reference to <figref idref="f0042">figs. <b>40a</b> and <b>40b</b></figref><b>,</b> as well as <figref idref="f0040">figs. <b>37a</b></figref> and <figref idref="f0041"><b>37b</b></figref> there is on the bright or light emitting background <b>313; 350</b> located at least one array or column <b>385</b> of repeatedly occurring dark markings <b>385',</b> e.g. black squares at an in-feed region receiving objects in direction <b>388</b> at which objects are fed into the apparatus for viewing, detection, turning and sorting, as previously disclosed. Further, there may on the background <b>313; 350</b> be located at least one array or row <b>385"</b> of repeatedly occurring dark markings <b>385"'.</b> At least one such row may be useful if the entry or in-feed region causes objects to be fed in a direction <b>388'.</b> However, if the insertion opening <b>425</b> is so configured that it may be possible for a human hand to be inserted there-through and into the viewing chamber, so as to move into the viewing chamber essentially from above and thereby avoid obscuring viewing of the array <b>385,</b> the array <b>385"</b> is present to assist in providing additional light curtain functionality.

0191It has also been indicated by dotted lines on <figref idref="f0042">fig. <b>40a</b></figref> that e.g. two columns of markings and two rows of markings could be possible, although the number of rows and/ or columns could be more than two.

0192Alternative or supplementary to the interspaced markings <b>385', 385"'</b> indicated on <figref idref="f0042">fig. <b>40a</b></figref><b>,</b> there could be located markings <b>395, 396</b> and <b>397</b> in the form of solid lines, as indicated on <figref idref="f0042">fig. <b>40b</b></figref><b>.</b>

0193It is possible to have a column or row configuration of markings or a joint column and row configuration.

0194<figref idref="f0040">Fig. <b>37a</b></figref> exhibits two half-images <b>360</b> and <b>361,</b> as previous discussed, whereas <figref idref="f0041">fig.37b</figref> exhibits a generalized full image <b>386</b> as provided by the available pixels on a camera image sensor matrix <b>401'</b> (see <figref idref="f0041">fig. <b>37c</b></figref>). The dotted line <b>387</b> and/ or <b>387'</b> on <figref idref="f0041">fig. <b>37b</b></figref> (not shown on <figref idref="f0040">fig. 37a</figref> for clarity reason) denotes, relative to the camera image, a fraction or fractions of matrix pixels being a selected part of the available sensor matrix pixels. Said fraction <b>387</b> of sensor matrix pixels is dedicated to detection of the array or column of markings, as well as any events observable by said fraction of pixels and which could trigger an action, such as stopping operation of a motor, e.g. motor <b>404</b> or <b>422</b> with reference to <figref idref="f0044">figs. <b>46</b></figref><b>,</b><figref idref="f0045"><b>47</b></figref><b>,</b><figref idref="f0046"><b>48</b></figref><b>,</b><figref idref="f0047"><b>49</b></figref> and <figref idref="f0049"><b>51</b></figref><b>.</b> Similarly, said fraction <b>387'</b> of sensor matrix pixels is dedicated to detection of the array <b>385"</b> or row of markings, as well as any events observable by said fraction of pixels and which could trigger an action, such as stopping operation of a motor, e.g. motor <b>404</b> or 422 with reference to <figref idref="f0044">figs. <b>46</b></figref><b>,</b><figref idref="f0045"><b>47</b></figref><b>,</b><figref idref="f0046"><b>48</b></figref><b>,</b><figref idref="f0047"><b>49</b></figref> and <figref idref="f0049"><b>51</b></figref><b>.</b> As indicated above, the arrays <b>385</b> and <b>385"</b> of markings <b>385'</b> and <b>385"'</b> could both be present, yielding that both fractions <b>387</b> and <b>387'</b> will be active for detection of markings and observable events.

0195A background area <b>314 ; 350</b> is located in the camera field of view, and as shown on e.g. <figref idref="f0042">fig. <b>40a</b></figref><b>,</b> said background area in a part thereof exhibits the array <b>385</b> of distinguished markings <b>385'.</b>

0196As indicated on e.g. <figref idref="f0029">figs. <b>26</b></figref> and <figref idref="f0042"><b>40a</b></figref><b>,</b> and derivable from <figref idref="f0044">fig. <b>46</b></figref><b>,</b> the background area <b>313; 350</b> is located in a camera viewing chamber of a reverse vending machine. The chamber or input receiving area <b>210</b> (<figref idref="f0009 f0010 f0011 f0012">figs. <b>6 - 9</b></figref><b>)</b> has entry opening (see <b>425</b> on <figref idref="f0044">fig.<b>46</b></figref><b>)</b> into which an object <b>10</b> in the form of an empty beverage container to be viewed by the camera, is insertable. From <figref idref="f0042">fig. <b>40a</b></figref> is noted that the array <b>387</b> of markings is located at an entry opening or region <b>425</b> of said viewing chamber <b>210.</b> The in-feed direction for objects is indicated by reference numeral <b>388</b> on <figref idref="f0041">fig. <b>37b</b></figref><b>.</b> As indicated on <figref idref="f0040">figs. <b>37a</b></figref><b>,</b><figref idref="f0041"><b>37b</b></figref> and <figref idref="f0042"><b>40a</b></figref> the array of markings is in a predefined pattern, suitably a column <b>385</b> of mutually spaced markings <b>385'.</b> However, as disclosed above there could be as an alternative or in combination with the pattern <b>385</b> an additional predefined pattern <b>385"</b> of mutually spaced markings <b>385"'</b> extending as e.g. an upper row, to provide an addition light curtain and to safeguard against any safety hazards caused by someone trying to put e.g. a hand into the viewing chamber from above, as e.g. indicated by reference numeral <b>388'.</b>

0197As indicated above, the fraction <b>387</b> and/ or fraction <b>387'</b> of sensor matrix pixels <b>401'</b> in the camera <b>400</b> will be dedicated to providing an image of said markings <b>385'</b> and / or <b>385"'</b> against said background area. The fraction <b>387</b> and/ or fraction <b>387'</b> of pixels will be readable by an operating unit <b>408,</b> the response of which is dictated by its hardware functions and inputs to the unit <b>408.</b> The operating unit <b>408</b> is operatively linked with the camera <b>401</b> to read said fraction of sensor matrix pixels. Further, the operating unit <b>408</b> is linked to a digital processing and control unit <b>400,</b> said unit <b>400</b> controlling operation of the camera, i.e. when a camera image is to be taken.

0198The operating unit has a set of stored reference pixel signal values which are respectively related to pixels in said fraction of sensor matrix pixels, and which are related to said background area <b>313; 350</b> and said array <b>387</b> of distinguished markings thereon.

0199The operating unit <b>408</b> is capable of comparing a read pixel signal value from a respective pixel in said fraction of pixels with corresponding reference signal value assigned to such respective pixel, and to output respective comparison signal, however said operating unit <b>408</b> having an output <b>408'; 408"</b> capable of changing signal state of delivered signal 393, suitably into a disabling or deactivating signal when said comparison signal or for that matter a set of such comparison signals departs from a predefined condition.

0200The signal <b>393,</b> when in a disabling or deactivating state, is effective to cause disablement or halted operation of functional equipment <b>404; 422</b> having movable parts, e.g. a motor and its motor controlled parts. In a preferred mode of the invention, the operating unit 408 will, when the comparison satisfies the predefined condition, provide a signal <b>393</b> which enables the equipment to remain in operation. Such equipment could e.g. be found in a reverse vending machine as disclosed in the description and shown on the drawings.

0201As indicated above, the operating unit <b>408</b> is made to execute hardware functions, and the operating unit can be of a logic network of a type well known to any skilled person in the art and connected to execute the required functions. The operating unit can made from a plurality of discrete functional building blocks or a single integrated circuit (IC) as an application specified integrated circuit (ASIC) , e.g. as a so-called Gate Array, or as an implementation in a programmable circuit, so-called Field Programmable Gate Array (FPGA).

0202The operating unit <b>408</b> may include a watchdog timer <b>403</b> which is designed to check that reading of pixel signals from said fraction of pixels and comparison with reference pixel signal values are made at a minimum rate of iteration. The reading of pixels is initiated from the processing and control unit <b>400.</b> If said minimum rate of iteration is below a set value, the operating unit <b>408</b> may output said signal <b>393</b> in a state thereof causing disablement or shut-down of operation of equipment controlled by the unit <b>408.</b>

0203The signal <b>393</b> in a deactivating state will normally be present until such a point of time when a new surveillance image taken meets all preset criteria for not issuing such deactivation type of signal.

0204In order to provide proper operation, it is considered that there should be a synchronization of the camera and a light source providing a bright or illuminated background area. Preferably there is used a light reflective material <b>313</b> at the camera field of view onto which said dark squares <b>385'</b> have been applied. However, if the background <b>350</b> is a back-lit or illuminated panel, it could be visualized synchronized operation thereof with the operation of the camera.

0205In order to provide a proper safety function, it is appreciated that surveillance images of the chamber or area <b>210</b> will have to be generated frequently. Using the camera <b>401,</b> it will by means of the operating unit <b>408</b> and with aid of the unit <b>400</b> be checked first if a complete bright line exists, i.e. all matrix pixel values above a predefined dark level threshold. If this is the case, there will be a search for alternating dark and bright areas along a predefined column, such as column <b>385.</b> In a preferred embodiment, the detected image of dark areas <b>385'</b> should be within minimum and maximum length requirements to pass acceptance. Further, the bright areas must be of a minimum length before accepted. Also, the image must end with an accepted bright area. Finally, an accumulated number of accepted dark areas must equal a predefined number.

0206<figref idref="f0041">Fig. <b>37c</b></figref> is a system block diagram specifically related to the light curtain functionality, and should be considered essentially as part of the block schematic shown on <figref idref="f0044">fig. <b>46</b></figref><b>.</b> The camera <b>401</b> is controlled by a digital processor <b>400</b> associated with the operating unit. This processor is in <figref idref="f0044">fig. <b>46</b></figref> denoted as a processing and control unit <b>400.</b> Line <b>389</b> denotes camera control, and the camera delivers image data signals on line <b>390</b> to the operating device <b>408.</b> The operating device <b>408</b> has a watchdog timer <b>403</b> connected thereto. The unit <b>400</b> suitably controls triggering of camera imaging, as well as synchronization of the camera and any background illumination. Image data are conveyed from the operating unit <b>408</b> to the processor <b>400</b> via line <b>392,</b> and the processor <b>400</b> provides the operating unit 408 with certain control signals via line <b>392.</b> The processor <b>400</b> is suitably the main processor of the overall system, although this is not necessarily so.

0207Most importantly, to avoid the drawbacks known from prior art and as mentioned in the introduction, the dedicated set of sensor matrix pixels forming a fractional part of the the total number of sensor matrix pixels is not selected through use of software, but is instead related to a limited number of physical pixels or elements on the camera image sensor matrix. As the light curtain function is important from an operational safety point of view, it is therefore absolutely essential that the light curtain function is not at all software based.

0208From <figref idref="f0040">fig. <b>38</b></figref> it is noted that the bright background <b>313 ; 350</b> has an aperture <b>365</b> therein in order to let the camera read via said aperture illuminated marking <b>366</b> on a token <b>367</b> to be dispensed in a controlled manner. Such token <b>367</b> is configured to be related to observed objects , e.g. <b>10 ; 10' ; 10" ; 10"'</b> which are supported and to be removed by an object supporting means, e.g. of a type shown on <figref idref="f0029">fig. <b>26</b></figref> or <figref idref="f0035">fig. <b>32</b></figref><b>.</b>

0209Suitably, said camera is configured to alternately, selectively or repeatedly a) cause detection of object contour, said light curtain related markings <b>385'</b> and <b>385"'</b> and events related thereto, and said token marking <b>366,</b> and b) cause reading of identifying features, e.g. <b>10""</b> or <b>364</b> located on the object <b>10;</b> denoted on <figref idref="f0040">fig. <b>37a</b></figref> by reference <b>362.</b>

0210All embodiments of <figref idref="f0028 f0029 f0030 f0031 f0032 f0033 f0034 f0035 f0036 f0037 f0038 f0039">fig. <b>25 - 36</b></figref> can be used with the light curtain function, but the light curtain functionality according to the invention is not limited to the configuration shown on these drawing figures.

0211<u style="single">A Token System</u>

0212As noted from <figref idref="f0029">figs. <b>26</b></figref><b>,</b><figref idref="f0038"><b>35</b></figref><b>,</b><figref idref="f0040"><b>38</b></figref><b>,</b><figref idref="f0042"><b>40a, 40b , 41</b> and <b>42</b></figref> the background area , e.g. <b>313</b> or <b>350</b> may have an aperture <b>365</b> therein in order to allow the camera which views the first region <b>306</b> to detect illuminated, pre-printed or pre-provided marking <b>366</b> on a token <b>367</b> which is arranged to be dispensed in a controlled manner from stack of tokens. Such a token could be related to information such as both a token serial number and a return or redemption value of an object or objects which have been viewed and considered by an RVM. On image part <b>360</b> it is indicated how the camera may view such marking, denoted by <b>366'</b> through the viewable aperture <b>365'.</b>

0213In order to obtain an efficient reading of such marking <b>366</b> without using an additional light source, the markings on the tokens are suitably made from a retro-reflective material. Alternatively, the token itself could be made from a retro-reflective material and the markings in such a case from non-retro-reflective material.

0214As shown on <figref idref="f0040">figs. <b>38</b></figref><b>,</b><figref idref="f0042"><b>41a</b> and <b>42</b></figref> said markings are camera readable via a mirror 368 located adjacent the aperture <b>365</b> in background area <b>313; 350.</b> This may be a practical solution if tokens, e.g. in the form of cards, are dispensable from a dispenser unit <b>369.</b> If cards are merely to be inserted into a guide <b>370</b> in the front of a RVM (see <figref idref="f0029">figs. <b>26</b></figref> and <figref idref="f0042"><b>41b</b></figref><b>)</b> to be read by the camera and then withdrawn, the card guide may be located at the back of the light reflective area <b>313</b> or the panel <b>350,</b> so as to place the card with its face having markings <b>366</b> parallel to the back of the area <b>313</b> or panel <b>350.</b>

0215In case a light emitting background panel <b>350</b> is used, the panel <b>350</b> constitutes the first light source which is primarily dedicated to assist camera viewing of object contour. However, light from the second light source will not necessarily impinge upon the marking <b>366</b> of a token <b>367</b> viewable through the aperture <b>365,</b> but if such light in fact impinges upon the marking, it may either be non - parallel light rays or insufficient light in order for the camera to clearly see and cause detection of the markings. In such a case, it is suitable to use an optical beam splitter <b>371,</b> as depicted on <figref idref="f0038">fig. <b>35</b></figref> and a separate light source <b>372.</b>

0216In the case of using an optical beam splitter covering part of the camera field of view, as shown in <figref idref="f0028">figs. <b>25</b></figref><b>,</b><figref idref="f0029"><b>26</b></figref><b>,</b><figref idref="f0031"><b>28</b></figref> and <figref idref="f0036"><b>33</b></figref><b>,</b> the camera <b>308</b> is suitably configured to take an image of both of said first and second regions simultaneously. However, image taking may just as well be based on taking an image of said first and second regions alternately, or selectively taking a partial image of said first region or said second region.

0217In the case where an optical beam splitter covers completely the camera field of view, as seen from <figref idref="f0030">figs. <b>27</b></figref> and <figref idref="f0037"><b>34</b></figref><b>,</b> the camera <b>308</b> is configured to take an image of both of said first and second regions simultaneously to form a two part image, as e.g. shown on <figref idref="f0040">fig. <b>37a</b></figref><b>.</b> However, it would also be feasible to consider taking a full image of said first and second regions alternately, or selectively taking a partial image of said first region or said second region.

0218In the embodiments of <figref idref="f0032 f0033 f0034">figs. <b>29 - 31</b></figref><b>,</b> as well as <figref idref="f0038">figs. <b>35</b></figref> and <figref idref="f0039"><b>36</b></figref><b>,</b> the camera <b>340; 345; 351; 356; 358</b> could suitably take images alternately or selectively, although it could be visualized taking two partial images of the viewing region simultaneously, one dedicated to contour recognition and the other to identifying features on the object. The embodiments of <figref idref="f0033">figs. <b>30</b></figref><b>,</b><figref idref="f0038"><b>35</b></figref> and <figref idref="f0039"><b>36</b></figref> in addition provides for reading of marking on a token, as disclosed e.g. in relationship to <figref idref="f0040 f0042">fig. <b>38 - 42</b></figref><b>.</b>

0219It has been disclosed above that the second light source 301, or for that matter also the light sources <b>344, 349</b> and <b>359</b> can be constituted by a plurality of light sub-sources, and the light source <b>301</b> has been indicated to have e.g. four such sub-sources <b>302 - 305,</b> although there could be fewer sub-sources or more. For the other sources <b>344, 349</b> and <b>359</b> three or four sub-sources have been indicated, without labeling each. The reason for more than one light sub-source is that light reflexes from the object or position of the light sub-source relative to the identifying feature on the object may cause the reading of the feature to be difficult or even impossible. In view thereof the light sub-sources are suitably selectively activated, although activation would be possible individually, in pairs or in groups, or in a cycle.

0220<figref idref="f0043">Figs. <b>43 - 45</b></figref> illustrate a preferred card dispenser <b>369</b> to be used for dispensing tokens, e.g. cards <b>367.</b> The dispenser <b>369</b> has a dispensing outlet <b>373</b> for dispensing cards <b>367</b> one-by-one from a stack of cards contained in a storage compartment <b>374.</b> The markings <b>366</b> on the cards <b>367</b> are viewable through an opening <b>375</b> in the bottom of the dispenser. A pusher member <b>376</b> is provided to push out cards one-by one by a reciprocal motion of the pusher member or slide <b>376,</b> the reciprocal motion being provided by a controllable motor <b>377</b> having control wires <b>378</b> for controlling power to the motor. Suitably, the motor <b>377</b> has a pinion (not shown) in engagement with a rack <b>379</b> on the pusher or slide to enable the reciprocal movement thereof.

0221<b><u style="single">RVM Operational System Overview</u></b>

0222<figref idref="f0044">Fig. <b>46</b></figref> depicts an overall system in which the various aspects of the present invention are implemented.

0223The reverse vending machine (RVM) has said processing and control unit <b>400</b> which receives video data from the camera <b>401</b> via a video analyzer <b>402.</b> The camera <b>401</b> is also linked to the operation unit <b>408,</b> and the operation unit includes the watchdog timer <b>403</b> and a motor control. The motor #1 and its control, denoted <b>404,</b> are related to the drive of the supporting means <b>325, 327,</b> or the unit <b>333</b> as disclosed earlier. A motor overload sensor <b>405</b> is also provided to inhibit operation of motor #1 in case of jam not detected by the operational unit <b>408</b> or a jam detector <b>406.</b> The sensor <b>405</b> could be in the form of a pressure sensitive bar, or the roller <b>243</b> could have its weight sensor <b>253</b> (in <figref idref="f0044">fig. <b>46</b></figref> denoted by <b>419)</b> modified in order to also indicate pressure against the roller caused by a jam due to an object not fully located in the recess or space <b>222.</b>

0224The operation unit <b>408</b> is, as disclosed earlier linked with the camera <b>401</b> and the processing and control unit (processor) <b>400,</b> and in the present example the unit <b>408</b> controls the motor controls <b>404</b> and <b>422</b> directly, although such control could be via the processor <b>400.</b>

0225As indicated earlier , optically readable cards will normally be read by e.g. camera <b>401.</b> However, if a card is a magnetic readable/ writable card or an r.f. readable/ writable card, there will be the need of a card reader / card encoder unit <b>411.</b> The card dispenser <b>361</b> as disclosed earlier is on <figref idref="f0040">fig. <b>38</b></figref> denoted by <b>412 .</b>

0226Suitably, the tokens are ready made, pre-coded cards, like the cards <b>367</b> which are dispensable one by one from the dispenser means <b>369; 412</b> (<figref idref="f0044">fig.<b>46</b></figref>) and which upon the feed-out from the dispenser <b>412</b> via output <b>412'</b> is code-read by a code reader/ encoder <b>411,</b> in particular if the card is a magnetic stripe or r.f. card. Alternatively, if the card is an optically readable card, the card is read by the camera <b>401</b> via aperture <b>424</b> and inclined mirror <b>424'</b> as more closely disclosed in connection with <figref idref="f0040">figs. <b>38</b></figref><b>,</b><figref idref="f0042"><b>41a</b> and <b>42</b></figref> (see references <b>365</b> and <b>368).</b>

0227If the card is a magnetic stripe card or an r.f. card and with no information on the card when it is located in the dispenser, the code reader/ encoder <b>411</b> will be able to encode the card with a card code, such as e.g. a serial number or other identity, or the combination of a card code or serial number or other identity and a redemption value to be rewarded or paid, as the cards are fed out from the dispenser one-by-one.

0228If the cards to be used for reward of empty beverage containers deposited in the RVM are not to be delivered from a card dispenser, such token could be a personal token which the customer brings with him to the RVM and uses to transfer card identity data from the card to the RVM. If the card is an optically readable card, it can be read by the camera <b>401</b> and as indicated further by reference <b>411'</b> when inserted into a slot (see reference <b>370;</b><figref idref="f0029">fig. <b>26</b></figref><b>)</b> and viewable through an aperture (see reference <b>370';</b><figref idref="f0029">fig. <b>26</b></figref><b>)</b> in the light retro-reflective area (see reference <b>313;</b><figref idref="f0029">fig. <b>26</b></figref><b>).</b> If the card is an r.f. readable card, the card could be readable by an r.f. reader <b>411",</b> and if the card is a magnetic stripe readable card, the card could be readable by a magnetic stripe reader <b>411"'.</b>

0229The cards, irrespective of being optically readable, r.f. readable or encodable, or magnetic stripe readable or encodable, could be in the form of a reusable token, in particular because the cards are in any case validated and after reward has been paid, invalidated. The token could be retrieved from a stack or a band of cards. If a band of cards or a zig-zag arranged band of cards is used, the dispenser <b>369 (412</b> on <figref idref="f0044">fig. <b>46</b></figref><b>)</b> should suitably be replaced by a conventional type of dispenser for such card arrangement. Also, different type of encoder 411 may be required. In any case, the card should have at least an alphanumerical, machine readable code.

0230If the token is a card which is optically readable, the card should have a pre-made code thereon, suitably consisting of a bar code or other optically readable code readable by an optical reader such as the camera <b>401.</b> As indicated earlier, the bar code or other optically readable code is preferably retro-reflective to light. Such configuration of the card makes an additional light source for viewing the code on the card superfluous. Conversely, the card could be made of a retro-reflective material and the bar code be made of a non-reflective material.

0231The processor <b>400</b> will either directly, or via a central computer installation <b>413</b> transfer to a rewarding or check-out and payment station <b>414</b> information related to a readable token code and information related to said return value. Transfer of information to and from the processor to the computer <b>413</b> and the station <b>414</b> is suitably via a local area network (LAN) <b>415.</b> The station <b>414</b> has a card reader <b>416</b> to read the card before reward or redemption value is paid. The card is then invalidated through use of a token invalidation means <b>407</b> associated with the station <b>414</b> or through internal operation in the unit <b>400</b> and/ or the computer <b>413.</b> In an alternative embodiment the processor <b>400</b> communicates with a "tick-off" unit <b>417,</b> which could be in the form of a mini-computer, such as so-called PDA. This could be a solution useful for a small store, through which there is conveyed to the unit <b>417</b> from the processor displayable information such as visible card identity and sum to be paid. Upon payment of the required money, the operator ticks off the particular item displayed, which is then made void or invalid, cancelled in the unit <b>400</b> and/ or computer <b>413,</b> and suitably removed from the display on the unit <b>417.</b>

0232The RVM has suitably a display <b>418</b> to properly guide or inform an RVM user how to operate. If the display is a touch screen, the customer may communicate with the processor <b>400.</b> The container weight sensor <b>419</b> indicated on <figref idref="f0044">fig. <b>46</b></figref><b>,</b> which has been described earlier in the context of <figref idref="f0021">fig. <b>18</b></figref> as sensor <b>253,</b> is provided to engage an end <b>247</b> of an axle <b>243'</b> (see <figref idref="f0029">fig. <b>26</b></figref><b>)</b> of the roller <b>243,</b> so as to spot whenever a too heavy beverage container is fed into the RVM through an opening <b>425</b> on the RVM. The term "too heavy" in this context is meant to imply that the unit <b>400,</b> upon receiving information related to shape and identity features, will compare these data with library data in the unit <b>400,</b> and thereby determine whether the object in fact should weigh less or not. This has been disclosed in more detail earlier. Also as indicated, the weight sensor could suitably form or supplement the jam sensor <b>405.</b>

0233An interlock-mechanism <b>420</b> is provided for safety reasons. The mechanism is suitably a set of sensors and switches to ensure that the RVM cannot be operated unless all units are in proper place and all cabinet panels are in proper mounted position and cabinet doors are locked.

0234A power supply <b>421</b> is provided, suitably linked to power consuming units via the unit <b>400.</b>

0235A motor and control unit <b>422</b> is provided to cause the volume of a collection container <b>426</b> to be adjusted by winding or unwinding a flexible side and bottom <b>426'.</b> However, although <figref idref="f0049">fig. <b>51</b></figref> shows a collection container <b>426,</b> it would be understood by the average expert in the art that other operational equipment could be installed and operated instead of the collection container. Such equipment could include one or more from the group of: conveyor; pusher unit; rotation means; compactor; disintegrator; sorter means. The positioning and evidently the configuration of such equipment in cooperation with the motor <b>422</b> could be substantially different from that of the collection container <b>426.</b> The collection container is particularly suitable for heavier objects, e.g. bottles of glass.

0236Reference numeral <b>423</b> in <figref idref="f0044">fig. <b>46</b></figref> denotes a position sensor which is used to detect rotary positions of the drum <b>220,</b> or the plunger <b>270,</b> and will be described in slightly more detail in connection with <figref idref="f0048">figs. <b>50a</b> and <b>50b</b></figref><b>.</b>

0237The reference numeral <b>100</b> denotes generally a storage compartment for receiving objects delivered from the supporting, sorting, conveying and push-out unit<b>200.</b> The storage chamber or compartment <b>100,</b> as shown also in <figref idref="f0049">fig. <b>51</b></figref> has been extensively disclosed earlier in the present disclosure, see disclosure related to <figref idref="f0002 f0003 f0004 f0005 f0006 f0007 f0008 f0009 f0010 f0011 f0012 f0013 f0014 f0015 f0016 f0017 f0018 f0019 f0020 f0021 f0022 f0023 f0024 f0025 f0026 f0027">figs. <b>1 - 24</b></figref><b>,</b> and <figref idref="f0005 f0006 f0007 f0008 f0009 f0010 f0011">figs. <b>2 - 8</b></figref> in particular.

0238<b><u style="single">Electro-mechanical Drive Device</u></b>

0239<figref idref="f0045">Figs. <b>47</b></figref><b>,</b><figref idref="f0048"><b>50a</b></figref><b>,</b><figref idref="f0048"><b>50b</b></figref><b>and</b><figref idref="f0049"><b>51</b></figref> show that the unit <b>200</b> is powered by a motor <b>404</b> via a gear <b>500</b> which engages a gear <b>501 on</b> the unit <b>200</b> to turn the drum <b>220</b> and in so doing also moving the element <b>223.</b> The roller <b>243</b> is forcibly moveable through interaction between a small gear <b>502</b> and the substantially larger gear <b>501.</b> Motor <b>404</b> is fixedly attached to the framework <b>503</b> of the RVM via brackets <b>504,</b> whereas the unit can be pulled out entirely from the RVM cabinet <b>428</b> (see reference <b>250</b> on <figref idref="f0021">figs. <b>18</b></figref> and <figref idref="f0022"><b>19</b></figref><b>)</b> for cleaning, as indicated by arrow <b>505,</b> and be pushed into the cabinet again after cleaning for gear engagement between gears <b>500</b> and <b>501.</b> No electrical parts are present on the unit <b>200,</b> just mechanical parts which stand wet cleaning, and even high pressure wet cleaning without any problem.

0240Thus, it is clearly seen that the advantages offered by the present invention reside in that the unit <b>200</b> is connected via a mechanically separable power transfer coupling formed by gears <b>500</b> and <b>501,</b> the gear <b>500</b> being operated by the motor <b>404</b> which is stationary fixed in the cabinet <b>428.</b> Thus the electrically powered drive <b>404, 500</b> is located separable from the unit <b>200</b> and its gears <b>501, 502.</b>

0241<figref idref="f0046">Figs. <b>48a</b> and <b>48b</b></figref> show a collection container <b>426</b> powered by a motor <b>422.</b> The motor <b>422</b> has in a non-limiting example a winged male, spindle-like member <b>506</b> which is configured to fit in a releasable manner into a winged, female member <b>507</b> on a drive shaft <b>508,</b> the drive shaft <b>508</b> in this non-limitative example to be use for winding or unwinding the flexible side and bottom <b>426'.</b> The container <b>426</b> can be pulled out of the RVM cabinet <b>428</b> for emptying and cleaning, and pushed into the cabinet again for engagement between the members <b>506</b> and <b>507.</b> The motor <b>422,</b> like motor <b>404</b> is suitably fixedly attached to the framework <b>503</b> of the RVM cabinet or to the cabinet wall or any suitable stay in the cabinet. When the unit <b>200</b> or the container <b>426</b> are in position in the cabinet and with a cabinet front door closed, there will be full engagement between the power gear <b>500</b> and the gear <b>501</b> (see element <b>244</b> on <figref idref="f0013">fig. <b>10</b></figref><b>),</b> and similarly between members <b>506</b> and <b>507.</b> The wing configuration on members <b>506</b> and <b>507</b> ensures that full rotational locking engagement is provided.

0242Instead of the male/ female coupling <b>506/ 507</b> on <figref idref="f0046">figs. <b>48a</b> and <b>48b</b></figref><b>,</b> a male/ female coupling as shown on <figref idref="f0047">figs. <b>49a</b> or <b>49b</b></figref> could be used. Suitably, the female part of the coupling would be on the handling unit side, and with the male part at the drive-motor side, although the arrangement could be vice versa.

0243In the example of <figref idref="f0047">fig. <b>49a</b></figref><b>,</b> the male part has a spring-loaded plug <b>509,</b> loaded by a spring <b>510</b> in a housing <b>511</b> and powered by a motor <b>512</b> via a drive shaft <b>513.</b> The female part has a housing <b>514</b> with a drive shaft <b>515</b> connecting to a drive mechanism (not shown) located on a handling unit, such as e.g. a handling unit like the unit <b>200</b> or <b>426.</b> The housing has a recess or socket <b>516</b> configured to fit the plug <b>509.</b> It is appreciated that when the handling unit is pushed into the cabinet, the end face <b>514'</b> of the housing <b>514</b> will more than likely abut the end face <b>509'</b> of the plug <b>509,</b> as in most cases the plug <b>509</b> is not aligned with the socket <b>516.</b> However, when the motor <b>512</b> (fixedly attached to the cabinet or the cabinet framework or stays) starts to operate, the housing <b>511</b> with the plug <b>509</b> pushed into the housing <b>511</b> starts to rotate until the plug is aligned with the socket <b>516,</b> at which moment the plug <b>509</b> will pop out from the housing 511 and into the socket 516, whereby mechanical coupling is established between the motor 512 and the handling unit.

0244In the example of <figref idref="f0047">fig. <b>49b</b></figref><b>,</b> the male part <b>524</b> has a four-winged plug <b>525</b> with a spike <b>526,</b> powered by a motor <b>512</b> via a drive shaft <b>513.</b> The female part has a housing <b>527</b> with a drive shaft <b>528</b> connecting to a drive mechanism (not shown) located on a handling unit, such as e.g. a handling unit like the unit <b>200</b> or <b>426.</b> The housing has a socket <b>529</b> configured to fit the plug <b>525.</b> The spike <b>526,</b> which is for aligning the male and female parts <b>524; 527</b> fits into a recess <b>530</b> in the female part <b>527.</b> When the handling unit is pushed into the cabinet, the end face <b>527'</b> of the female part <b>527</b> will more than likely abut the end face <b>525'</b> of the plug <b>525,</b> as in most cases the plug <b>525</b> is not aligned with the socket <b>529.</b> The female part <b>527</b> will thus be pushed backwards about and along the shaft <b>528</b> against action from a spring <b>531.</b> However, when the motor <b>512</b> (fixedly attached to the cabinet or the cabinet framework or stays) starts to operate, the part <b>524</b> with the plug <b>525</b> starts to rotate until the plug is aligned with the socket <b>529,</b> at which moment the female part <b>527</b> will move by spring force towards the male part <b>524</b> and allow the socket <b>529</b> to be mechanically engaged with the plug <b>525,</b> whereby mechanical coupling is established between the motor <b>512</b> and the handling unit.

0245If required, releasable locking means, suitably easily reachable by maintenance staff, could be provided to fully lock units like those labeled <b>200</b> and <b>426</b> in position relative to the RVM cabinet.

0246As indicated on <figref idref="f0044">fig. <b>46</b></figref><b>,</b> sorter or drum rotary position detectors <b>423</b> may be provided. <figref idref="f0048">Fig. <b>50a</b></figref> shows position detectors <b>517</b> and <b>518</b> interacting with markings <b>517', 518'</b> on the drum cog-wheel 519. The detectors may be of a magnetic type detecting metal elements constituting said markings. The markings may be of an optical type if the detectors are of optical type. In <figref idref="f0048">fig. <b>50b</b></figref> optical detectors <b>520, 521</b> interact with a code-disk attached to the rotation-shaft <b>523</b> of the drum.

0247Modification of the various elements, means and devices related to the numerous aspects of the present invention would be conceivable within the scope of the invention as defined in the attached claims.