Printer and stacker and methods of printing and stacking labels

Field of the Invention

0001This invention relates to the field of printers and stackers and to methods of printing and stacking labels.

Background of the Invention

0002The following prior art is made of record: <patcit id="pcit0001" dnum="US4418618A"><text>U.S. patents 4,418,618</text></patcit>; <patcit id="pcit0002" dnum="US5486259A"><text>5,486,259</text></patcit>; <patcit id="pcit0003" dnum="US5695291A"><text>5,695,291</text></patcit>; <patcit id="pcit0004" dnum="US5785442A"><text>5,785,442</text></patcit>; <patcit id="pcit0005" dnum="US5820277A"><text>5,820,277</text></patcit>; <patcit id="pcit0006" dnum="US5833377A"><text>5,833,377</text></patcit>; <patcit id="pcit0007" dnum="US5961228A"><text>5,961,228</text></patcit>; <patcit id="pcit0008" dnum="US6059468A"><text>6,059,468</text></patcit>; <patcit id="pcit0009" dnum="US6078345A"><text>6,078,345</text></patcit>; <patcit id="pcit0010" dnum="US6142622A"><text>6,142,622</text></patcit>; <patcit id="pcit0011" dnum="US6164203A"><text>6,164,203</text></patcit>; <patcit id="pcit0012" dnum="US6241407A"><text>6,241,407</text></patcit>; <patcit id="pcit0013" dnum="US6336760A"><text>6,336,760</text></patcit>; Users Manual, Paxar Model 656/636 Manual Edition 6.3, 8 August 2003; and Ink Jet Care Label Printers From Markem Technology That Delivers High-Quality Care Labels At Savings Of Up to 50% brochure, circa 1999.

0003United States Patent <patcit id="pcit0014" dnum="US3799465A"><text>3,799,465</text></patcit> discloses a self-centering holder for a roll of paper wound on a hollow core. The holder comprises a cantilevered mandrel on which the core of the paper roll is mounted. The mandrel has slots at either end, with flanges extending through the slots at the supported end and slidable depressible latches extending through slots at the unsupported end. A coupling mechanism inside the mandrel insures that the flanges and the latches are always equally distant from the center of the mandrel. A paper roll is mounted on the mandrel by sliding the core over the depressed latches and pushing the end of the core against the flanges. As the flanges slide toward the supported end of the mandrel, the latches move outward toward the unsupported end. When the latches reach the end of the core they pivot outward through the corresponding slots to engage the core and retain it in position on the mandrel.

0004United States Patent <patcit id="pcit0015" dnum="US6164203A"><text>6,164,203</text></patcit> discloses a printer with a print head for printing on a web of record members. The web is held in roll form on a holder. The web roll and the web are center-justified with respect to the centerline of the print head. The holder has a series of steps extending in each direction away from the centerline. The steps provide pairs of opposed guides or shoulders between which the web rolls can be positioned. There is a pair of guides that corresponds to each width of ink roll.

Summary

0005The present invention as defined by independent claim 1 defines a spindle assembly. The spindle assembly comprises an axially extending spindle for mounting a supply roll core having a web wound thereon, and a latch movably mounted on the spindle and having at least one pair of spaced connected shoulders engageable with opposite ends of the supply roll core. The supply roll core is center-justifiable on the spindle and confinable by and between the pair of shoulders in that the spindle is capable of mounting supply roll cores of different predetermined widths having respective webs of different widths wound thereon and that the latch has two sets of pairs of connected stepped shoulders each engageable with opposite ends of a supply roll core of a different predetermined width.

0006A method of performing the present invention involves providing the spindle assembly of claim 1, mounting a said supply roll core of a predetermined width having a respective web wound thereon, and moving the pair of shoulders that correspond to the core of the predetermined width into straddling relationship to the ends of the core when the core is center-justified with respect to the spindle.

Brief Description of the Diagrammatic Drawings

0007<ul id="ul0001" list-style="none" compact="compact"><li><figref idref="f0001">FIGURE 1</figref> is a front elevational view of a printer in accordance with an embodiment of the invention showing a printable web threaded to be printed on both sides;</li><li><figref idref="f0002">FIGURE 2</figref> is a fragmentary front elevational view showing the printer in an arrangement in which only one side of the web is being printed;</li><li><figref idref="f0003">FIGURE 3</figref> is a fragmentary front elevational view showing the printer in an arrangement in which the web is being threaded through the printer prior to printing;</li><li><figref idref="f0004">FIGURE 4</figref> is a fragmentary perspective view showing two platen rolls, the auxiliary feed mechanism and the cutter, wherein the one platen roll and the auxiliary feed mechanism are driven from a single electric motor through gearing;</li><li><figref idref="f0005">FIGURE 5</figref> is a fragmentary perspective view of the rear portion of the printer showing the arrangement for mounting the platen rolls, a belt and gearing;</li><li><figref idref="f0006">FIGURE 6</figref> is a fragmentary perspective view of certain components also shown in <figref idref="f0005">FIGURE 5</figref> and the stacker feed mechanism;</li><li><figref idref="f0007">FIGURE 7</figref> is a fragmentary perspective view of the rear portion of the printer and a portion of the stacker;</li><li><figref idref="f0008">FIGURE 8</figref> is an exploded perspective view of the auxiliary feed mechanism;</li><li><figref idref="f0009">FIGURE 9</figref> is an enlarged sectional view of the auxiliary feed mechanism and a cutter;</li><li><figref idref="f0010">FIGURE 10</figref> is an exploded perspective view of a print head assembly;</li><li><figref idref="f0011">FIGURE 11</figref> is an enlarged sectional view taken along line 11-11 of <figref idref="f0012">FIGURE 12</figref>;</li><li><figref idref="f0012">FIGURE 12</figref> is an elevational view of a print head assembly latched in printing cooperation with a platen roll;</li><li><figref idref="f0012">FIGURE 13</figref> is a left side elevational view of the print head assembly and platen roll of <figref idref="f0012">FIGURE 12</figref>;</li><li><figref idref="f0013">FIGURE 14</figref> is a fragmentary perspective view of the printer and the stacker;</li><li><figref idref="f0014">FIGURE 15</figref> is another fragmentary perspective view of the printer and the stacker;</li><li><figref idref="f0015">FIGURE 16</figref> is an elevational right side view of the printer and stacker shown in <figref idref="f0001">FIGURE 1</figref>;</li><li><figref idref="f0016">FIGURE 17</figref> is another fragmentary perspective view of the printer and the stacker;</li><li><figref idref="f0017">FIGURE 18</figref> is a diagrammatic elevational view showing a label being fed into the stacker and onto the top of the stack;</li><li><figref idref="f0018">FIGURE 19</figref> is an exploded perspective view of portions of an unwind mechanism for a label supply roll;</li><li><figref idref="f0019">FIGURE 20</figref> is a sectional view of the unwind mechanism in its unclamped or loading (or unloading) position;</li><li><figref idref="f0020">FIGURE 21</figref> is a fragmentary sectional view taken along line 21-21 of <figref idref="f0019">FIGURE 20</figref>;</li><li><figref idref="f0021">FIGURE 22</figref> is a sectional view of the unwind mechanism in its clamped position, and taken along a different plane from that shown in <figref idref="f0019">FIGURE 20</figref>;</li><li><figref idref="f0020">FIGURE 23</figref> is a fragmentary sectional view taken along line 23 - 23 of <figref idref="f0021">FIGURE 22</figref>;</li><li><figref idref="f0022">FIGURE 24</figref> is a perspective view of one of the four ink ribbon mechanisms of the printer, showing an ink ribbon core mounted on a spindle;</li><li><figref idref="f0023">FIGURE 25</figref> is a perspective view of the spindle shown in <figref idref="f0022">FIGURE 24</figref>;</li><li><figref idref="f0024">FIGURE 26</figref> is a perspective view of the spindle and a core received in the spindle;</li><li><figref idref="f0025">FIGURE 27</figref> is a partly fragmentary elevational view of the spindle and the core;</li><li><figref idref="f0026">FIGURE 28</figref> is a sectional view taken along line 28 - 28 of <figref idref="f0025">FIGURE 27</figref>;</li><li><figref idref="f0027">FIGURE 29</figref> is a view of a latch or detent of the spindle taken generally along line 29 - 29 of <figref idref="f0026">FIGURE 28</figref>;</li><li><figref idref="f0027">FIGURE 30</figref> is a sectional view taken along line 30-30 of <figref idref="f0027">FIGURE 29</figref>;</li><li><figref idref="f0028">FIGURE 31</figref> is an elevational view of an alternative construction of a spindle and latch;</li><li><figref idref="f0029">FIGURE 32</figref> is an elevational view partly in section of a spindle with a latch and a core which is edge-justified on the spindle;</li><li><figref idref="f0030">FIGURE 33</figref> is an elevational view partly in section of another alternative construction of a spindle and a latch with a core edge-justified on the spindle; and</li><li><figref idref="f0031">FIGURE 34</figref> is a view showing the drive system including gearing for the stacker feed mechanism.</li></ul>

Detailed Description of the Preferred Embodiments

0008With reference initially to <figref idref="f0001">FIGURE 1</figref>, there is shown a printer generally indicated at 50 for printing on a printable web W and a stacker generally indicated at 51. The web W is initially in the form of a wound supply roll R mounted on an unwind mechanism generally indicated at 52. The web W is drawn through the printer 50 in the direction of arrows shown along the path of the web W. As the web W is paid out of the web roll R, the web roll R rotates clockwise in the direction of arrow A. The unwind mechanism 52 applies a slight tensioning force to the web W by attempting to rotate the roll R counterclockwise, that is, in a direction opposite to the direction of the arrow A. However, the force exerted on the web W to feed the web W through the printer 50 overcomes the force exerted by the unwind mechanism to enable the web W to be fed through the printer 50. By this arrangement the web W is always maintained under the desired tension.

0009The printer 50 includes a print head assembly 53 and a cooperable platen in the form of a platen roll 54. The printer 50 also includes another print head assembly 55 and a cooperable platen in the form of a platen roll 56. The print head assembly 53 and the platen roll 54 may be termed the "first" print head assembly and the "first" platen roll, respectively, because they are upstream of the print head assembly 55 and the platen roll 56. Similarly, the print head assembly 55 and the platen roll 56 are downstream of the print head assembly 53 and the platen roll 54 and may be termed the "second" print head assembly and the "second" platen roll. The print head assemblies 53 and 55 are identical and the platen rolls 54 and 56 are identical. The print head assemblies 53 and 55 are secured to the frame plate 70 by screws (not shown).

0010A thermal print head 53' at a side of the print head assembly 53 cooperates with the platen roll 54 to print on the underside of the web W. A thermal print head 55' at a lower side of the print head assembly 55 cooperates with the platen roll 56 to print on the upper surface of the web W. The platen rolls 54 and 56 are shown in their respective latched positions in <figref idref="f0001">FIGURE 1</figref>.

0011The platen roll 54 is a non-driven or idler roll, but the platen roll 56 is a driven roll. During operation of the printer 50, the platen roll 56 feeds the web W from the roll R past a guide mechanism generally indicated at 57 to between the print head 53' and the platen roll 54 and to between the print head 55' and the platen roll 56. From there the web W passes to an auxiliary feed mechanism generally indicated at 58 which feeds the web W to a cutter or cutter mechanism 59. The cutter 59 cuts the web W into predetermined length sheets, in particular labels or tags L. The labels or tags L are fed by a stacker feed mechanism generally indicated at 60 onto a platform 61 of the stacker 51.

0012It is preferred that the printer 50 be of the thermal transfer type, wherein ink ribbons I pass between the thermal print heads 53' and 55' and the web W. A first ink ribbon system 62 is associated with the first print head assembly 53 and the platen roll 54, and a second ink ribbon system 63 in associated with the print head assembly 55 and the platen roll 56. The ink ribbon systems 62 and 63 are identical. The systems 62 and 63 each have a supply spindle 64 and a take-up spindle 65 of identical construction. Each spindle 64 mounts a supply roll SR and each spindle 65 mounts a take-up roll TR. Each roll SR and TR is mounted on a core 66, and each spindle 64 and 65 is driven by a mechanism best shown in <figref idref="f0022">FIGURE 24</figref>. Each system 62 and 63 is microprocessor controlled.

0013As shown in <figref idref="f0002">FIGURE 2</figref>, the printer 50 is also constructed to enable printing on only one side of the web W, if desired. As shown in <figref idref="f0002">FIGURE 2</figref>, the platen roll 54 has been moved completely out of the path of the web W to a rest or inoperative position. The web W is also spaced from the print head 53'.

0014<figref idref="f0003">FIGURE 3</figref> shows the printer 50 in its threading position in which the web W can be easily threaded from the supply roll R directly to the auxiliary feed mechanism 58. As shown in <figref idref="f0003">FIGURE 3</figref>, both platen rolls 54 and 56 have been moved to their rest or inoperative unlatched positions spaced from their respective print heads 53' and 55'. Because the platen rolls 54 and 56 are cantilevered and are separable from their respective print head assemblies 53 and 55, the web W and ink ribbons I can be readily threaded through their respective paths because the front of the printer is readily user-accessible.

0015With reference to <figref idref="f0004">FIGURE 4</figref>, the guide mechanism 57 is shown to include a pair of spaced guides 68. The guides 68 can guide the web W from the supply roll R to any one of the positions shown in <figref idref="f0001 f0002 f0003">FIGURES 1 through 3</figref>. Side guides 69 guide the side edges of the web W. The side guides 69 are center-justified by a type of mechanism having a pinion meshing directly with two racks as in above-mentioned <patcit id="pcit0016" dnum="US5820277A"><text>U.S. patent 5,820,277</text></patcit>.

0016<figref idref="f0004">FIGURE 4</figref> shows that the auxiliary feed mechanism 58 and the cutter 59 are secured to a vertically extending frame plate 70. The frame plate 70 are arcuate slots or cutouts 71 and 72 which enable the platen rolls 54 and 56 to be swung between the rest or inoperative position and the operating position. In <figref idref="f0004">FIGURE 4</figref>, the platen rolls 54 and 56 are shown in their operative positions, it being noted that the print head assemblies 53 and 55 have been omitted for the sake of clarity. An electric motor 73 has an output shaft 74 to which a gear 75 is secured. The gear 75 meshes directly with gears 76 and 77, and the gear 76 meshes directly with a gear 78. The gear 78 is secured to a shaft 79 of the platen roll 56. The gear 77 drives the auxiliary feed mechanism 58. The gears 75 through 78 are referred to generally as gearing G.

0017With reference to <figref idref="f0005">FIGURE 5</figref>, the frame plate 70 is shown to mount an arm 80. The arm 80 is mounted for pivotal movement on a shaft 81. The shaft 81 is mounted in a bearing 82 mounted in a cutout 83 in the frame plate 70 and in a bearing 84 mounted in a standoff 85 (<figref idref="f0007">FIGURE 7</figref>). The arm 80 rotatably mounts the shaft 79 which is spaced from the axis of the pivot 81. The platen roll 56 is cantilevered to the arm 80. The gear 78 is secured to the shaft 79 so that the platen roll 56, the shaft 79 and the gear 78 rotate as a unit when the motor 73 is operated. It is apparent that movement of the arm 80 and the platen roll 56 between operative and inoperative positions does not affect the drive connections between the gears 75, 76 and 78. The gear 76 is on the axis of the shaft 81. The gear 76 is an idler gear that drives the driven gear 78.

0018Resilient, elastomeric, frictional sleeves 79' and 87' are received about respective shafts 79 and 87. The sleeves 79' and 87' are preferably molded directly onto the shafts 79 and 87. An arm 86 identical to the arm 80 rotatably receives a platen roll shaft 87 of the platen 54. The platen rolls 54 and 56 and their respective shafts 87 and 79 are identical. The arm 86 is pivotally mounted to a shaft 88 cantilevered to the frame plate 70. The platen roll 54 is cantilevered to the arm 86. The platen roll 54 is shown in the printing position, while the platen roll 56 is shown in its inoperative or non-printing position in <figref idref="f0005">FIGURE 5</figref>. A tension spring 86' connected to the arm 86 and to the frame plate 70 normally urges and holds the platen roll 54 in its inoperative position, however, the spring 86' is extended when the platen roll 54 is in its operative position wherein the platen roll 54 is latched in position by the print head assembly 53.

0019In that the gear 77 is driven by the electric motor 73 through the gear 75, the gear 77 drives a shaft 89 of a frictional feed roll 90 (<figref idref="f0008">FIGURE 8</figref>). The gear 77 and a pulley wheel 91 are secured against rotation relative to the shaft 89. An endless belt 92 drives a pulley wheel 93 and stacker feed roll shaft 94. The shaft 94 drives a frictional stacker feed roll 95 (<figref idref="f0006">FIGURE 6</figref>). The belt 92 also passes partly around an idler pulley wheel 96 rotatable on a shaft 97 (<figref idref="f0005">FIGURES 5</figref> and <figref idref="f0006">6</figref>) and about another idler pulley wheel 98 (<figref idref="f0006">FIGURE 6</figref>) rotatable about a shaft 99 cantilevered to the frame plate 70. A cutter shaft 100 extends through an enlarged hole 101 in the frame plate 70. As best shown in <figref idref="f0007">FIGURE 7</figref>, the cutter shaft 100 is driven directly by a stepping motor 102. The stepping motors 73 and 102 are mounted to a standoff 103 which is in turn mounted to the standoff 85.

0020With reference to <figref idref="f0008">FIGURE 8</figref>, the feed wheel shaft 89 is rotatably mounted in spaced bearings 104 mounted in identical bearing blocks 105. The feed roll 90 cooperates with a backing roll 106 having a shaft 107 rotatably mounted in spaced bearings 108 loosely mounted in turn in the bearing blocks 105. The bearing blocks 105 have recesses 105' which receive respective compression springs (not shown) which urge the bearings 108 upwardly so that the roll 106 is urged into feeding contact with feed roll 90. The web W passes between the rolls 90 and 106 and over a shelf or platform 109. The platform 109 has slots 110 onto which roll portions 111 of the roll 106 extend. Thus, the nip between the rolls 90 and 106 is at the level of or slightly above the upper surface of the platform 109. The auxiliary feed roll assembly 58 is secured to the frame plate 70 by screws 112 (<figref idref="f0001">FIGURE 1</figref>) passing through holes 113 in the subframe plate 114.

0021The cutter assembly or cutter 59 is located by locators 115 (<figref idref="f0008">FIGURE 8</figref>) and fastened to the plate 114 by a screw (not shown) passing through a hole 115'in the plate 114. The knife assembly 59 includes a knife 116 (<figref idref="f0009">FIGURE 9</figref>) mounted on the shaft 100 and a cooperable pivotally mounted knife 117. The knife 117 is spring-biased against a cam 119. The knife 116 and its shaft 100 make a single complete revolution when the stepping motor 102 is energized to cut a label L from the web W. In so doing the shaft 100 and the knife 116 start in the nine o'clock position as seen in <figref idref="f0009">FIGURE 9</figref> and rotate clockwise until the knife 116 cooperates with the knife 117 to cut a label L from the web W. A guide 120 extends just short of the nip of the knives 116 and 117 to confine the path of movement of the web W into the nip of the knives 116 and 117.

0022With reference to <figref idref="f0010">FIGURE 10</figref>, one of the two identical print head assemblies, for example the print head assembly 55, is illustrated in exploded form. The print head assembly 55, as the print head assembly 53, has a frame or housing 120 which is cantilevered to the frame plate 70. The print head assembly 55 is similar in certain respects to a print head assembly disclosed in above-mentioned <patcit id="pcit0017" dnum="US5833377A"><text>U.S. patent 5,833,377</text></patcit>. A connector generally indicated at 121 fits into a slot 122 in an elongate metal mounting member 123. Upstanding spring fingers 124 have projections 125 that are releasably engaged with the upper surface 123' of upstanding flange 123" of the plate 123. An elongate metal plate or heat sink 126 releasably mounted and located with respect to the connector 121. The heat sink 126 mounts the elongate thermal print head 55' which extends in the same direction as the elongate member 123. The plate 123 has a pair of spaced platforms 126' with upstanding tangs 127. The springs 128 act on the platforms 126'. A pair of print head pressure adjusting devices 129 act on the springs 128 to adjust the spring forces exerted on the platforms 126'. The adjusting devices 129 are constructed like those shown in <patcit id="pcit0018" dnum="US5833377A"><text>U.S. patent 5,833,377</text></patcit>. The plate 123 also has a flange 126" received in an enlarged opening 120' (<figref idref="f0011">FIGURE 11</figref>) in the housing 120. The flange 126" is shown to be spaced from the bottom of the opening 120' as viewed in <figref idref="f0011">FIGURE 11</figref>. The flange 126" limits the movement of the print head 55' in the downward direction (<figref idref="f0011">FIGURE 11</figref>) when the platen roll 56 is moved to its rest position as shown in <figref idref="f0003">FIGURE 3</figref>. A ball-shaped member 133 received in a spherical socket 133' enables the connector 121, the plate 123 and the print head 55' to pivot so that when the platen roll 56 is moved into the <figref idref="f0011">FIGURE 11</figref> position, the springs 128 yield and the flange 126" is raised above the bottom of the opening 120'. In this position the print head 55' is in printing cooperation with the platen roll 56.

0023The plate 123 also has a pair of forked locators 130 each having depending locating members 130'. Each locator 130 has a pair of guide walls 131. Each pair of guide walls 131 receives a bearing 132 on the shaft 79 (or 87) to locate the platen roll 56 (or 54) with respect to the print head 55' (or 53') as seen in <figref idref="f0011 f0012">FIGURES 11 through 13</figref>. The bearings 132 are disposed outboard of the respective sleeves 79' and 87'.

0024A latch generally indicated at 136 (<figref idref="f0010">FIGURE 10</figref>) includes a pair of spaced latch members 137 shown to be connected by a rod 138. The rod 138 is solid except for threaded holes 139 in each end. Each end of the rod 138 terminates in a pair of spaced projections 140. The projections 140 are received in notches 141 in the latch members 137. The notches 141 open into a central hole 142. A pair of pivot screws 143 pass through the holes 142 and are threaded into the holes 139. The holes 142 receive pivot portions 143'. The projections 140 key the latch members 137 in aligned relationship to the rod 138 so that the rod 138 and the latch members 137 can rotate as a unit or in unison about the pivot portions 143'. Each latch member 137 has a hole 144 for receiving one end of a tension spring 145. Each spring 145 passes through the housing 120 and is retained by a pin 146 which passes through the other end of the spring 145 and bears against the outer surface of the housing 120. The springs 145 urge the latch 136 clockwise as viewed in <figref idref="f0010">FIGURES 10</figref> and <figref idref="f0012">13</figref> and counterclockwise as viewed in <figref idref="f0011">FIGURE 11</figref>. The latch members 137 have end portions 147 that cooperate with and grip the bearings 132 to releasably hold the platen roll 56 (or 54) in printing cooperation with the print head 55' (or 53'). The bearings 132 can be considered to be part of the platen rolls 54 and 56. The end portion 147 of each latch member 137 has a cam surface 148. When the platen roll 56 (or 54) is manually pivoted from the inoperative position into the operative or printing position in printing cooperation with the print head 55' (or 53'), the bearings 132 simultaneously act on cam surfaces 148 to cam the latch members 137 counterclockwise as viewed in <figref idref="f0010">FIGURES 10</figref> and <figref idref="f0012">13</figref> until the bearings 132 clear high point 149, whereupon the springs 145 pivot the latch members 137 as a unit to the latched position shown in <figref idref="f0011 f0012">FIGURES 11 through 13</figref>. The platen roll 56 (or 54) remains latched until the user grasps one of the latch members 137 and moves the latch 136 against the force of the springs 145 to a position where the high point 149 is clear of the bearings 132, thereby releasing the platen roll 56 (or 54) from the latch 136. While it is preferred to have two spaced latch members 137 to support the shaft 79 (or the shaft 87), it is within the scope of the invention to employ only one latch member 137. The housing 120 also rotatably mounts a roll 150 that is used to guide the ink ribbon I. The housing 120 also mounts an adjustable pot 120' for controlling the amount of power delivered to the print head 55'.

0025With reference to <figref idref="f0013">FIGURE 14</figref>, a pair of parallel horizontal shafts 151 and 152 are cantilevered perpendicularly to the vertical frame plate 70. A bracket 153 attached to a side wall 154 includes a thumb cap screw 155. When the screw 155 is loosened, the entire stacker 51 can be adjusted laterally to the longitudinal path of movement of the web W. Tightening of the screw 155 holds the stacker 51 in its adjusted position. The stacker feeder 60 which includes the driven feed roll 95 is cantilevered to the frame plate 70. The side wall 154 extends downwardly and outwardly away from the printer 50 as also shown in <figref idref="f0001">FIGURE 1</figref>.

0026<figref idref="f0015">FIGURE 16</figref> shows the inclination of a rear plate 156 which extends downwardly and forwardly away from the frame plate 70. Referring to <figref idref="f0015">FIGURES 16</figref> and <figref idref="f0016">17</figref>, pulley wheels 159 and 160 are shown to be rotatably mounted on the shafts 157 and 158 mounted on rear wall 156. A U-shaped bracket 160 has a bight 161 to which an electric motor 162 is secured. A gear 164 is secured to output shaft 163 of the motor 162. The gear 164 meshes with a gear 165 on a shaft 166. Another gear 167 on the shaft 166 meshes with a gear 168 on a shaft 169. The shafts 166 and 169 are rotatably supported by the bight 161 of the bracket 160 (<figref idref="f0007">FIGURES 7</figref> and <figref idref="f0015">16</figref>). A capstan 170 is secured to the shaft 169. A belt or cable 171 passes partly around the pulley wheels 159 and 160 and each looped end is connected to a post 172 of a slide 173. The cable 171 is wrapped around the capstan 170 three times, so operation of the stepping motor 162 drives the capstan 169 to drive the cable 171. The cable 171 is only shown to be wrapped about the capstan 170 once in <figref idref="f0016">FIGURE 17</figref> and the cable 171 is omitted in <figref idref="f0007">FIGURES 7</figref> and <figref idref="f0015">16</figref> for the sake of clarity of illustration. The slide 173 has a ridge 174 guided in a slot 175 in the plate 1.56. The platform 61 includes a depending mounting member 176 (<figref idref="f0014">FIGURE 15</figref>) secured to the slide 173 by screws 176' passing through the slot 175. The slide 173 guides the platform 61 for movement along the slot 175. A sensor 177 (<figref idref="f0016">FIGURE 17</figref>) controls the position of the platform 61 and the height of the stack S. The sensor 177 has a sender light emitting diode 177S and one receiver or sensor 177R disposed on opposite sides of the label path. The diode 177S and the receiver 177R are disposed along a horizontal line above the top of the platform 61. If there is no label L on the platform at the beginning of operation, the receiver 177R receives the maximum amount of light from the diode 177S, which causes a signal from the receiver 177R to trigger the software to operate the stepping motor 162 to bring the platform 61 to its initial position close to the roll 95. As labels L accumulate on the platform 61, the amount of light received by the receiver 177R diminishes. When a threshold is reached because insufficient light is received by the receiver 177R, it means that the stack S needs to be lowered and a signal from the receiver 177R triggers the software to in turn energize the stepping motor 162 to lower the platform 61 and the stack S. The stack S will be moved down in response to a signal from the receiver 177R as every two to four labels are added to the stack S. The top of the stack S should be close to the underside of the roll 95. When the user desires to remove the stack S from the platform 61, the user will stop the printer 50. Upon restarting the printer 50, the receiver 177R will again receive the maximum amount of light which will trigger the software to energize the motor 162 to raise the platform to its operational position.

0027With reference to <figref idref="f0017">FIGURE 18</figref>, there is shown a stack S of labels L on the platform 61 of the stacker 51. A label L' is shown being fed by and between the stacker rolls 95 and 95'. The driven feed roll 95 contacts the underside of the label L'. The stacker feed roll 95 is driven whereas the cooperating roll 95' is an idler or non-driven roll. Opposite ends of the roll 95' are mounted in elongate slots 60' (<figref idref="f0013">FIGURES 14</figref> and <figref idref="f0014">15</figref>) so that the roll 95' can be raised against gravity by the label L as it passes between the nip of the rolls 95 and 95'. <figref idref="f0017">FIGURE 18</figref> shows the trailing marginal end ME of the label L' at the nip of the rotating rolls 95 and 95', and shows the leading end LE against an adjustable stop 156'. The stop 156' is slidably positionable along top edge 156" of the rear wall 156 (<figref idref="f0001">FIGURE 1</figref>). When the leading end LE contacts the stop 156' the label L' buckles slightly. Because the roll 95 continues to rotate, the roll 95 contacts the trailing marginal end ME at the upper surface of the label L' to cause the label L' to be fed in the reverse or retrograde direction until the trailing end TE abuts or contacts the side wall 154. This retrograde movement also helps to settle the label L' on top of the stack S. As shown, the stacker feed roll 95 has spaced annular grooves 178 (<figref idref="f0007">FIGURES 7</figref>, <figref idref="f0013">14</figref>, <figref idref="f0014">15</figref>, <figref idref="f0016">17</figref> and <figref idref="f0017">18</figref>). A comb or stripper tines 179 project into the grooves 178 to prevent the label L' from wrapping around the roll 95. For labels L comprised of various materials e.g. those composed of fabric, it has been found that the stop 156' can be eliminated. Nevertheless, the rolls 95 and 95' function in the same manner as described above, namely, to feed incoming labels L' one-by-one onto the stack S and to feed the label L' in a retrograde direction with the trailing end TE fed by the feed roll 95 into abutment with the wall 154.

0028It is preferred that the stacker 51 have an open front so that it is easy to access and unload a stacker S of the labels L. The side wall 154 is preferably at an angle of about 72 degrees with respect to the vertical is indicated in <figref idref="f0001">FIGURE 1 at B</figref>. The rear wall 156 is preferably at an angle of about 20 degrees with respect to the vertical as indicated at D in <figref idref="f0015">FIGURE 16</figref>. The platform 61 is sloped upwardly and outwardly away from the wall 154 at an angle F of about 35 degrees with respect to the horizontal, however, the platform 61 is not sloped with respect to the horizontal from front to rear.

0029While the stacker 51 is shown to cooperate with the printer 50, the printer 50 can be used as a stand-alone machine, if desired. If the printer 50 is initially provided without the stacker 51, there is no need for the stacker feed mechanism 60 (which is part of the stacker 51) or the belt 91 or the pulley wheels 91, 93, 96 and 98 or the shafts 89, 94, 97 or 99. In addition, if a rewinder (not shown) is provided to rewind the printed web W, the auxiliary feed mechanism 58 and the cutter 59 can also be eliminated.

0030With reference to <figref idref="f0018 f0019 f0020 f0021">FIGURES 19 through 23</figref>, and initially to <figref idref="f0018">FIGURE 19</figref>, there is shown a holder generally indicated at 180 which is part of the unwinder or unwind mechanism 52. The holder 180 is shown in <figref idref="f0001">FIGURE 1</figref> to mount the supply roll R. The holder 180 includes a hub 181 having a flange 182 providing a shoulder 182'. Projecting outwardly from and anchored in the hub 181 are three equally angularly spaced parallel rods or control members 183 equally spaced radially outwardly from axis 184 of the hub. A threaded member or shaft generally indicated at 185 is threadably received by the hub 181. The shaft 185 has a right-hand thread portion 186 with right-hand threads and a left-hand thread portion 187 with left-hand threads of equal pitch. A marginal end portion 188 of the shaft 185 is D-shaped. A handle or knob 197 is mounted on the end portion 188. A carrier generally indicated at 189 has a set of three equally angularly and radially spaced arcuate slots 190. A clamp 191 is shown to include three clamp members 192 having holes 193 at one end portion and slots 194 at the other end portion. The control members 183 extend through the slots 190 and 194. Pivots or studs 195 pass through holes 193 and are loosely-fitted into equally spaced-apart holes 196 in the carrier 189. The pivots 195 are known commercially as female "PEM" studs. Screws 195', one of which is shown in <figref idref="f0019">FIGURE 20</figref>, are threaded into the pivots 195 and limit the axial movement of the pivots 195. The clamp members 192 are capable of pivoting about the pivots 195.

0031With reference to <figref idref="f0019">FIGURE 20</figref>, the supply roll R is shown mounted on the annular outer periphery of the hub 181 against the shoulder 182' of the flange 182 and the clamp members 192 are retracted and spaced from the side of the supply roll R. The supply roll R has a web W of printable label supply material such as fabric, paper or plastic mounted on a central core C. The clamp members 192 can clamp the roll R at the core C or in the event the roll of the web W is coreless, the clamp members 192 can clamp the side of the web W which has been wound into the roll R. The knob 197 is shown to be secured to the end portion 188 by a set screw 198. The knob 197 is bell-shaped and has an annular tubular portion 197" shown to be rotatably received about and relative to a portion of the carrier 189, however, with a roll R wider than shown, the knob 197 can be beyond the end of the carrier 189. The inside diameter of the annular tubular portion 197" of the knob 197 is at least slightly greater than the outside diameter of the carrier 189. The knob 197 has an internal co-axial tubular portion 199 into which a metal tubular member or sleeve 200 is press-fitted. The set screw 198 is threadably received by the sleeve 200 and bears against a flat 201 on end portion 188. The knob 197 has radially extending holes 197' one of which is aligned with a hole 199' in the tubular portion 199 and with the set screw 198 to enable the set screw 198 to be rotated by an Allen wrench (not shown).

0032The hub 181 has a central internally threaded sleeve or nut 202 which is press-fitted into a central hole 203 in the hub 181. The nut 202 has right-hand threads to cooperate threadably with the right-hand threaded portion 186. The carrier 189 has a central internally threaded sleeve or nut 204 which is press-fitted into a central hole 205 in the carrier 189. The nut 204 has left-hand threads to cooperate threadably with the left-hand threaded portion 187. The threading on the threaded portion 186 and the nut 202 could be made left-handed and the threading on the threaded portion 187 and the nut 204 could be made right-handed, if desired.

0033It is apparent that rotation of the knob 197 relative to the hub 181 will cause the shaft 185 to rotate in the same direction because the knob 197 is keyed to the shaft 185. Rotation of the knob 197 relative to the hub 181 in one direction, namely, clockwise in <figref idref="f0018">FIGURE 19</figref>, will simultaneously move the clamp members 192 from their retracted position (<figref idref="f0019">FIGURES 20</figref> and <figref idref="f0020">21</figref>) toward their extended position (<figref idref="f0021">FIGURES 22</figref> and <figref idref="f0020">23</figref>) and move the clamp members 192 toward side C2 of the core C of the roll R. Conversely, rotation of the knob 197 relative to the hub 181 in the opposite direction, namely, counterclockwise in <figref idref="f0018">FIGURE 19</figref> will simultaneously move the clamp members 192 from their extended positions toward their retracted positions. Once the clamp members 192 are in their extended positions, further clockwise rotation of the knob 197 will continue to advance the extended clamp members 192 toward the side of the roll R. Conversely, once the clamp members 192 are in their retracted positions, further counterclockwise rotation of the knob 197 moves the clamp members 192 away from the side of the roll R.

0034The maximum outside diameter of the knob 197 is at least slightly less than the diameter of inside C' of the core C (or the central hole of a coreless roll R) to enable the roll R to be slipped over the knob 197 and onto the hub 181 to a position wherein side C1 of the core C is against shoulder 182' of the flange 182. The clamp members 192 have a lesser outward extent in the retracted position than the carrier 189 as best shown in <figref idref="f0020">FIGURE 21</figref>.

0035With reference to <figref idref="f0019">FIGURES 20</figref> and <figref idref="f0021">22</figref>, the shaft 185 is mounted in frame plate 70 and in standoff 206 in spaced bearings 207. A gear 208 secured to the shaft 185 meshes with a gear 209 (<figref idref="f0021">FIGURE 22</figref>) secured to a gear 210. A d.c. motor 211 drives a gear 212 which meshes with gear 210. When energized, the motor 211 continuously attempts to rotate the shaft 185 in the counterclockwise direction (<figref idref="f0001">FIGURES 1</figref> and <figref idref="f0018">19</figref>) and this keeps the desired tension on the web W which has been threaded through the printer 50. When it is desired to clamp the clamp members 192 against the side of the roll R, the knob 197 is rotated clockwise relative to the hub 181 which simultaneously extends the clamp members from the <figref idref="f0020">FIGURE 21</figref> position to the <figref idref="f0020">FIGURE 23</figref> position and moves the hub 181 and the clamp members 192 equal distances toward each other simultaneously. When the clamp members 192 have been moved into clamping contact with the side of the roll R, the roll R is clamped between the shoulder 182' and the clamp members 192. The pitch of the threads in the threaded portions 186 and 187 is such that the clamp 191 is self-locking, that is, the clamp members 192 do not move apart from the shoulder 182' until the knob 197 is intentionally rotated in the counterclockwise direction relative to the hub 181 (<figref idref="f0018">FIGURE 19</figref>).

0036The threads on the threaded portion 186 and 187 are the same except for being right-hand and left-hand types so the hub 181 and the clamp members 192 move the same distance toward or away from each other upon either clockwise or counterclockwise rotation, respectively, of the knob 197. If it is desired to move the hub 181 and the clamp members 192 toward and away from each other with lesser rotation of the knob 197, the pitch of the threads of the threaded portions 186 and 187 and the nuts 202 and 204 can be increased or these threads can be provided with a double or triple pitch, but preferably the pitch should be such as to prevent the clamped hub 181 and carrier 189 from accidentally moving apart and loosening the clamping of the roll R between the flange 182 and the clamp members 192. Although three clamp members 192 and rods 183 are illustrated, a lever member such as one or two of each can be used.

0037With reference to <figref idref="f0020">FIGURE 23</figref>, if it is desired to unclamp the roll R, the knob 197 is rotated in the counterclockwise direction relative to the hub 181 and this causes the clamp members 192 to move to their retracted positions and causes the clamp members 192 and the carrier 189 to move apart relative to the hub 181 to the <figref idref="f0018">FIGURE 19</figref> position. It is apparent that the holder 180 can mount rolls of an infinite number of roll widths between limits. Irrespective of the width of the roll R, the roll R is always center-justified with respect to the print heads 53' and 55'. The centerline CL of the roll R is always the same irrespective of the width of the roll R. The centerline CL is also the same as the longitudinal centerline of the web W as it travels along its path through the printer 50 and the centerline of the ink ribbons I and the cores 66 on which the ribbons I are mounted. Therefore, the roll R, the ink ribbons I and cores 66, and the print heads 53' and 55' are all always along the same centerline CL, or center-justified. The illustrated roll R is relatively narrow. It is also apparent that the hub 181 and the clamp-carrying carrier 189 are coupled together. Nonetheless, limited relative rotational movement between the hub 181 and the clamp members 192 is permitted by the slots 190 in the carrier 189. The knob 197 and the clamp members 192 can have limited relative rotation, however, rotation of the knob 197 always moves the hub 181 on the one hand and the carrier 189 and clamp members 192 on the other hand toward or away from each other. The relative rotation between the hub 181 and the clamp members 192 makes it possible to move the clamp members 192 between their retracted and extended positions.

0038A method involves mounting a supply roll R on a hub 181, providing at least one clamping member 192 movable from a retracted position to an extended position along a side of the supply roll R and moving the clamp member(s) 192 and the hub 181 relatively toward each other to clamp the supply roll R to the hub 181. Thereafter, the clamp member(s) 192 can be moved from the extended position to the retracted position and relatively away from the hub 181. In the retracted position of the clamp member(s) 192, a spent or partially spent core C can be removed from supported relationship on the hub 181 and a new roll R can be loaded onto the holder 180.

0039With reference to <figref idref="f0022 f0023 f0024 f0025 f0026 f0027">FIGURES 24 through 30</figref>, there is shown one of the four ink ribbon mechanisms 220. <figref idref="f0022">FIGURES 24</figref>, <figref idref="f0024">26</figref> and <figref idref="f0026">28</figref> omit the wound ink ribbon I for clarity and simplicity. There are two such mechanisms 220 for each system 62 and 63. Although the ink ribbon mechanisms 220 are identical in construction, they differ in function. The ink ribbon systems 62 and 63 (<figref idref="f0001">FIGURE 1</figref>) each have a supply component 62' and 63' and a take-up component 62" and 63". The ink ribbon I passes from the supply component 63' (and 62' assuming the print head assembly 53 is being used). In each case the ink ribbon I is unwound from the core 66 on the supply spindle 64 and wound onto the core 66 on the take-up spindle 65. If the print head assembly 53 is not to be used, then the supply component 62' and the take-up component 62" are not used at all. Both systems 62 and 63 are microprocessor controlled as in <patcit id="pcit0019" dnum="US5820277A"><text>U.S. patent 5,820,277</text></patcit>.

0040The mechanism 220 is now described in structural detail with reference to system 63, for example the supply component 63'. The mechanism 220 includes a spindle generally indicated at 64 secured to a shaft 222 mounted in a bearing block 223 in turn mounted in the frame plate 70 and in a bearing block 224 in the standoff 85. The shaft 222 has a D-shaped end portion 222' received in a D-shaped hole 64' at an end portion of the spindle. The shaft end portion threadably receives a cap screw 64". The spindle 64 is on the same axis as the shaft 222. A gear 225 secured to the shaft 222 meshes with a gear 225a secured to a gear 225b. The gear 225b is driven by a gear 225c on shaft 225d of a direct current motor M. The purpose of the motor M is to apply a force to the spindle 64 to maintain tension in the ink ribbon I. The spindle 64 is received in and mounts the core 66 onto which a supply of ink ribbon I (<figref idref="f0001">FIGURES 1</figref> and <figref idref="f0025">27</figref>) has been wound. The core 66 has three equally spaced, longitudinally extending splines or ribs 231 projecting radially inwardly from its inner surface 232 as best shown in <figref idref="f0026">FIGURE 28</figref> which key the core 66 against rotation to the spindle 64. One rib 231 projects into a groove 233 between two walls 234 and 235. Another of the ribs 231 contacts one side of a generally radially extending member 236, and the remaining rib 231 is received in a groove 237 and against ledges 237' (<figref idref="f0023">FIGURE 25</figref>). While the core 66 can be slid onto the spindle 64 from the right hand end of <figref idref="f0022">FIGURE 24</figref>, the core 66 is keyed to the spindle 64 and is thus incapable of rotating relative to the spindle 64.

0041As shown in <figref idref="f0023">FIGURE 25</figref>, for example, a latch or detent generally indicated at 228 is pivotally mounted on and adjacent to the spindle 64. The latch 228 is shown to include a generally flat latch member 229 having pairs or sets of connected stepped shoulders 238 through 243. A greater or lesser number of shoulders can be provided, if desired. The latch member 229 also has an outwardly extending manually engageable handle 244h. The latch member 229 has a hub 245 comprised of preferably four spaced hub portions 246. A spiral spring 247 is disposed axially between the two inboard hub portions 246. The spindle 64 has preferably four spaced projections 248. A pivot pin or shaft 249, extending parallel to the spindle axis, is mounted in the projections 248 and passes through the hub members 246 and the spiral spring 247. The pivot pin 249 mounts the latch member 229 for limited pivotal movement on the spindle 64 in opposite directions transverse to the spindle axis, and the spring 247 biases the latch member 229 clockwise as viewed in <figref idref="f0023">FIGURES 25</figref> and <figref idref="f0026">28</figref> for example. The spring 247 has an end portion 250 which bears against the spindle 64 and an end portion 251 which bears against the latch member 229. The latch member 229 is thus biased by the spring 247 against the inner surface 232 of the core 66. When the core 66 has been moved onto the spindle 64 to a position in which one set or pair of shoulders of the sets or pairs 238 through 243 is just slightly beyond both ends or end faces 252 and 253 of the core 66, the spring 247 pivots the detent member 229 clockwise (<figref idref="f0023">FIGURES 25</figref> AND 28) until the core 66 is straddled by one pair of the shoulders 238 through 243. For example, the widest core 66 would fit between and be straddled by opposed shoulders 238, while a narrowest core would fit between and be straddled by opposed shoulders 239. It is preferred that the shoulders 238 through 243 be sloped as best shown in <figref idref="f0026 f0027">FIGURES 28 through 30</figref> so that lands 238' through 243' fit against the curved inner surface 232 of the core 66. As best shown in <figref idref="f0025">FIGURES 27</figref> and <figref idref="f0027">30</figref>, the slopes of the lands 238' though 244' increase the closer these lands are to the axis of the shaft 249. For example, the slope of the land 244' is greater than the slope of any of the other lands 238' through 243, the slope of the land 243' is less than the slope of the land 244' but is greater than the slope of any of the lands 238' through 242', and so on, to enable each of the lands 238' through 244' to match the curvature of the inside surface 232 of the core 66. To release the latch member 229, the user grasps the handle 244h and pivots the latch member 229 counter-clockwise to the phantom line position PL shown in <figref idref="f0026">FIGURE 28</figref> for example to release the latch 228 from the core 66 to thereby uncouple the core 66 from the spindle 64 and to enable the core 66 to be slid off the spindle 64.

0042A method involves providing a spindle such as the spindle 64 and two sets of pairs of connected shoulders 238 through 243 mounted on the spindle 64, wherein the spindle 64 is capable of mounting supply roll cores 66 of different widths with ink ribbons I of different widths wound respectively thereon, and moving the pair of shoulders 238 through 243 that correspond to a core 66 of a predetermined width into straddling relationship to the ends of the core 66 when the core 66 is center-justified with respect to the spindle 64. It is preferred to spring-bias one pair of the shoulders 238 through 243 into straddling relationship with opposite ends 252 and 253 of the core 66.

0043When it is desired to remove the core 66 from the spindle 64, it is preferred to move the pairs of shoulders 238 through 243 out of straddling relationship with the ends 252 and 253 of the core 66 and slide the core 66 out beyond the end of the spindle 64.

0044The embodiment of <figref idref="f0028">FIGURE 31</figref> is identical to the embodiment of <figref idref="f0001 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">FIGURES 1 through 30</figref>, except as shown to be different in <figref idref="f0028">FIGURE 31</figref> and as described herein. Identical structure is designated by the same reference characters with the addition of letter "a". In the embodiment of <figref idref="f0028">FIGURE 31</figref>, instead of having opposed pairs of steps 238 through 243, there is a pair of continuous inclined shoulders or surfaces or edges 300 that extend upwardly and outwardly from the midpoint between them. The surfaces 300 also slope progressively in the same direction as the surfaces 238' through 244' so that irrespective of the width of the core 66 the surfaces 300 will be positioned against the inner surface 232 of the core 66 when the core 66 is centered or center-justified. The surfaces 300 have been considered to have an infinite number of small steps that form lines, preferably straight lines with a curved surface.

0045<figref idref="f0029">FIGURE 32</figref> illustrates an alternative arrangement which can be used in a different printer in which edge-justification instead of center-justification is required. The embodiment of <figref idref="f0029">FIGURE 32</figref> is identical to the embodiment of <figref idref="f0001 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">FIGURES 1 through 30</figref> except as shown to be different in <figref idref="f0029">FIGURE 32</figref> and as described herein. Identical structure is designated by the same reference characters with the addition of the letter "b". In the <figref idref="f0029">FIGURE 32</figref> embodiment, the spindle 64b has a flange 254 with a stop surface or shoulder 254' and the latch 228b differs from the latch 228 as noted below. In such an arrangement the core 66 would fit against the annular stop shoulder 254' and a latch or detent 228b having a latch member 229b would have shoulders 238b through 243b cooperating with only end face 252 of the core 66. One of the shoulders identified at 238b through 243b would pivot into position in opposition to the end portion face 252 and would be held in that position by a spring 247b when the core face 253 abuts the shoulder 254' at an edge-justified position as shown. In other respects the spindle 64b and the latch 228b are the same as the spindle 64 and the latch 228.

0046A method practiced in connection with the disclosure of <figref idref="f0029">FIGURE 32</figref> involves providing a spindle 64b and a set of connected stepped shoulders 238b through 243b movably mounted as a unit on the spindle 64b, wherein the spindle 64b is capable of mounting supply roll cores 66 of different widths having respective webs of different width ink-ribbons I wound thereon, and moving the set of stepped shoulders 238b through 242b to bring the shoulder corresponding to the width of the core 66 in face-to-face relationship near the end 252 of the core 66 when the core 66 has been brought to an edge-justified stop position on the spindle 64b. <figref idref="f0029">FIGURE 32</figref> shows the shoulder 241b in face-to-face relationship to end 252 of the core 66. The core 66 can be removed by pivoting the latch member 229b against the force of the spring 247b to a position in which the core 66 can be slid off the spindle 64b.

0047The embodiment of <figref idref="f0030">FIGURES 33</figref> is identical to the embodiment of <figref idref="f0029">FIGURE 32</figref>, except as shown to be different in <figref idref="f0030">FIGURE 33</figref> and as described herein. Identical structure is designated by the same reference characters with the addition of the letter "c". In the embodiment of <figref idref="f0030">FIGURE 33</figref>, instead of having steps 238b through 243b, there is a continuous inclined surface or shoulder or edge 400 that extends upwardly and outwardly from the flange 254. The surface 400 also has a continuously changing slope in the same direction as the surfaces 238'b through 244'b. When the core 66 is against the flange 254, the latch 228c will engage the inner edge of the face 252 when the spring 247c pivots the latch 228c to the latching or detenting position. To release the latch 228c, the handle 244hc is moved against the force of the spring 247c, and the core 66 can be slid off the spindle 64c.

0048Although the spindles 64, 64a, 64b, and 64c and the core 66 are illustrated in connection with an ink ribbon I, they can be used with other media such as printable ,and other types of wound webs, if desired.

0049A drive for the stacker feed mechanism 60 is shown in <figref idref="f0031">FIGURE 34</figref>. The <figref idref="f0031">FIGURE 34</figref> embodiment is identical to the embodiment of <figref idref="f0001 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">FIGURES 1 through 30</figref> except that gearing G1 includes a gear 500 secured to the shaft 89, an idler gear 501 that meshes with the gear 500, another idler gear 502 that meshes with the gear 501, and a driven gear 503 meshing with the gear 502. The gear 503 is secured to the shaft 94 and rotates the roll 95 whenever the motor 73 is energized to operate gearing G and G1.