Dispenser with separate propellant for products in fluent phase

SWEDEN

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PATENTS AND REGISTRATION OFFICE

PUBLISHING WRITING No. 325 835 intci B 05 b 11/00 κι. 85 g 3

Patent Application. No¹6191/67 Received on 24 XI 1967

Validity Date of 24 XI 1967 Ans. generally available therein in VII 1968

Ans. laid out and the petition published 6 VII 1970 Priority requested from 28 XI 1966 ooh

IX 1967 (France, 85 167, 121 42?)

JR ,, GEIGY AG, BASEL, SWITZERLAND Inventor: J Marand Agent: Ii Brann Finisher

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a red pressure knot atomizer, which enables portion distribution of a finely distributable medium,

In or a powdered product, by means of a propellant, which consists of a gas which is compressed or preferably Ur transferred in liquid form, the propellant being enclosed in a reservoir, as complete. If this is separated from the medium, the spm should be atomized. ·

Atomizers. of said kind are already known, which have particular use in the so-called "spray bombs", where the reservoir for the propellant is enclosed in an outer container containing the medium to be atomized.

The present invention relates to an improvement of atomizers of this kind, in which the reservoir of the propellant is disposed within the container of the medium to be atomized, and is fixed to a top piece closing the said container. The top cover contains a high pressure seal for the fuel reservoir and two low pressure closures, one of which opens or closes the passage of the medium "to be atomized" from the container to the atomizer nozzle and the other of which opens and closes the outer air to the interior of the container. pushbutton, which is formed as part of the three valve closures and the like, which allows access to the medium, which is to be atomized, and the propellant for the dispensing nozzle is kept sliding in said top piece, which closes the container for the medium.

Dupl.kl. 30 k: 9/01: ¾ 33 c: 20

POOR

325835 ··:·-· .·· ^: the operation of the three closures mentioned.

The aforementioned uppercut with its auxiliary parts carrying the reservoir of the medium for the atomization, in the following very short medium, called, forms a removable sub-unit which can be attached to different bean holders. Namely, such atomizers allow to greatly expand the use of spray bottle type devices.

The object which is the object of the present invention is to facilitate the industrial manufacture of the atomizer in question and to reduce its production price. They also aim to enable the assembly of these atomizers' details on vending machines and to fill them with known, classic filling machines.

Another object of the invention is to provide an atomizer which exhibits good properties of fineness in the distribution and which avoids drip formation at the beginning and end of an atomization phase. The invention also aims to achieve an even and complete emptying of the container containing the atomizer, and thus an optimal efficiency.

According to the present invention, the atomizer has the upper part formed by a housing for the container and a spacer and a seal are held to the center piece, which seal constitutes an element of the high pressure seal.

This outline) which allows the high pressure valve to be trained as an integral component of the upper socket has, as will be understood by the following important technical consequences »

According to a preferred embodiment of the invention, the insert for sealing the high pressure seal is secured by being wedged between a shoulder of the spacer, which surrounds a passageway for the actuator associated with the pushbutton, and a ring which is pressed into a recess in said spacer. .

Under these conditions, the reservoir for the propellant can advantageously be mounted directly on the outer periphery of the intermediate shaft, so that the reservoir e.g. with its upper edge folded on a bead of this intermediate piece.

This embodiment significantly facilitates the assembly and subsequent filling of the fuel reservoir.

The ring pressure seal of the high pressure seal can be of such a kind, which bends down under the influence of a shoulder on the rod, as well as a rigid kind, in which case the rod slides into the seal.

In all the embodiments of the invention described below, the actuating rod has an axial channel for the passage of the propellant and a ring channel for the medium.

When operating the pushbutton, one of these two channels communicates over the opening with the container for the propellant and the other with a cavity fed by medium to be atomized.

The rod so formed can especially advantageously be formed as a single piece and inserted with its end, which is · at a distance from the closure, in the pushbutton.

Other improvements of the following example are particularly concerned with the connection between the high pressure seal and the intermediate part of the upper part and the attachment of the reservoir for the propellant on the upper part.

According to one of these improvements, the seal for the high pressure seal is mounted in a recess in the center piece of the upper piece, the concave side of which is facing the travel, whereby this seal is fixed in said recess through a holding matrix.g. 1

Namely, this design seems favorable by simplifying the design and mounting and increasing the density of the entire device.

In a particular embodiment, the needle ring for the high pressure seal tears a fitted ring inserted into a needle space in the center piece of the upper piece, whereby this ring itself is clamped between the center piece and the reservoir neck. According to another interesting variation for the saving of individual parts, the pour ring for the high-pressure seal and the fuel reservoir housing holds a whole, the neck can either be folded on a ring bead in the center piece or glued or welded on it. The choice of attachment method depends on the nature of the wall (metal or plastic material).

According to you yet. another improvement shows the hollowed bar on sir. outer surface a plurality of longitudinal ridges, and the push-up cover covering said rod contains a sleeve in which the rod is inserted so that it is staggered with its protrusions against the inner surface of the sleeve, thereby forming the channels for the passage of the medium to be atomized. This embodiment simplifies the push button fabrication.

The invention will now be described in more detail with reference to the accompanying drawings, in which:

Fig. 1 shows an axial section through the top and its attachment portions in the unaffected position; Fig. 4 is an axial section through a second embodiment of the top piece in the unaffected position; Fig. 5 is an analogous section through this top section in atomizing position; 6 an axial section of a further embodiment in the unaffected position, Fig. 7 ^eFIG. 8-10 is a diagram showing the mode of operation; FIG. 11 is an axial sectional genius of a portion of a further atomizer; FIG. 1 is a longitudinal line 12-12 of FIG. 11, Fig. 1? a plan view of a portion of the valve rod in the fining valve and further elevations thereof, fig. U, a schematic view with partial axial section of a surface-mounted embodiment, and fig. V, 16 and 17 axial sections through various forms of the connection between the fuel reservoir and the headers.

Fig. 1 of the accompanying drawings shows the top of a first atomiser according to the invention, which has a cover 1, e.g. s, v plastic, at the second a center piece 2 is attached, whereby these two parts abut each other at the shoulder 3 and are thereby centered, thus securing the position of a flexible sealing ring. This sealing joint belongs to both the low-pressure closure of the medium to be atomized and the low-pressure valve for access to the outside air. The attachment of the pieces 1 and 2 to each other can be carried out by ultrasonic welding.

In the cutter 1, a central opening is provided and in the center piece 2 there is an axial recess 6, through which the venous rod 7 with radial clearance extends; the latter is connected to a pushbutton 8, which contains the atomization nozzle 9 of the venturip, which is inserted into a cavity 11 in the pushbutton. The axial recess 6 is connected through you, opening 12 to a conical extension 13, which is recessed at the base of the center piece.

The opening 12 is provided at the edge with a bead 14 against which the flexible sealing ring 1f abuts, which belongs to the high pressure closure. The seal ring 15 is wedged between the bead 1 / and a ring 16 which is pressed into the recess 6.

The valve rod 7 is formed of one piece in a single working operation and exhibits for the propellant? passage a channel 17, which is lowered downwardly by a conical head 18, which is in the opening 12. In the resting state, the radial openings 19, which are recessed in the wall of the axial channel 17, are closed by the ilexible of the sealing ring 15. edge, the central opening of which is covered by the head 18.

The valve rod 7 contains several channels arranged around the center duct 17, parallel to the shaft 21, which are provided at the bottom of each with an outwardly extending opening 23 ·

Against core member 24, a spring 25 abuts the valve rod 7 and its other end abuts the ring 16. This spring action is such that the flexible edge of the sealing ring, when the device is at rest, rests on a tapered shoulder 26 of the core member and is curved as shown in Fig. 1 and, on the other hand, finds a support against an annular strip 28 · in the cover 1. This ensures the tight closure of the recess (opposite to the opening 5 ·

In the recess 6, a suction pipe 29, which is pressed into the bore 31 in the middle part 2, opens and is intended for suction of the medium to be atomized.

t 325835

Similarly, in the unaffected or resting position of the vertebra rod 7, a tight seal is secured between the opening 5, which communicates with the atmosphere due to the play of the slidable valve rod [, and not the inner rune of the cover 1, which is brought into contact with it. the annular map 28 faces the side of the sealing line 4 through at least one radial screen channel 32.

In this position of distribution center in the lip of the sealing ring 15 under tr; the oak through the head 18 in the valve moi; rings 16 and until the aperture 19 thereby closes so that there is a tight closure between the aperture 12 and the axial x-ray. 17 is ensured.

The valve rod 7 is included from the end portion 2 Dortvänia end Pressed into a bore 34 in the pressure knob 8, which bore communicates through a channel 35 ^m®d a conical opening 36 in the nozzle of the distributor).

As can be seen in Fig. 1, at the end of the annular chamber 21 there is an annular chamber 37) which communicates over a channel 38 with a second chamber 39 of the recess 11 in the pushbutton 3. In this chamber 39, radial channels 41 open at the nozzle 9. hal.3; in said mouse sole, m connects divergent recess 42.

The fuel reservoir 43 is secured to a bead 14 at the outer circumference of the spacer 2. The seal is secured in the present example to give 10m a sealing ring 45. Their sealing can also be formed there or above the surface without being left out, if the center piece 2 is made of a material (eg polyethylene) which is sufficiently resilient to enable a tight crease on the reservoir's neck. In the case that the reservoir 43 is made of plastic, its shells can be welded or glued directly to the intermediate piece 2.

The sub-assembly so formed exhibits the basic feature that it can be assembled to provide axial pressing and etching a small number of welding operations, which otherwise can be performed by known machines.

When the reservoir 43 is flush with the intermediate piece 2, it can be evacuated over the chamber 17 in the valve 1 of the bar 7, if the sonar is fitted with a lamella, and filled with a liquid gas transferred 46 by means of kinda, chassis filling tank. shining.

Dei. the whole unit shown in Fig. 1 is then ready to mount ice on a container containing the medium 48 to be supplied ice (Fig. 2).

For this purpose, the cover 1 has an edge 49) grip engages a collar 51 on the leg carrier 47 · The composition iv of both parts of the chin is effected by ultrasonic welding. Edges 51 and 49 kⁱⁿ be so ornate and dimensioned as to permit the application of a removable hood 52 over the entire device, which covers the pushbutton, when not in use.

It is understood that when the pushbutton is pressed in the direction of the arrow · '' in fig ·. 3, the valve rod 7 slides down into the recess 5 and into the bore 6. The wall of the channel 17 opposite the openings 19 bends the seal; The openings 19 so come ir. in reservoir space 43 rooms while the seal 15 maintains the seal in the manner described above. Gaseous propellant now flows into the channel 17 before the channels 35 reach the converging belt 36 (arrow P) in the atomizer. The propellant's pansies. through the nozzle 9 generates a negative pressure in the chamber 39, which was overpowered; channel 38 to channels 21 and to openings 23, which are later penetrated into the recess 6, where the sealing ring is lowered downwards by the displacement of the wall 22, while at the same time the connection between the bore 6 and the outer air is tightly closed. The negative pressure in the bore 6 is transferred to the tube 29, thereby generating the suction of the medium 48 from the container 4/4 which rises to the bore 6, then over the channels 21 to the radial channels 41 (p L), whereupon. it comes ir. in the nozzle 9? where it is atomized through the gas stream of the propellant.

At the same time, the underpressure generated in the tea holder 47 through the outflow of the medium causes the entry of outside air over the opening 5, between the bent netting ring 4 ^.PHI.0h the annular u⁺the projection 28 into the annular channel 3 · and thence into the purifier 4 '. gas run (arrow A.).

The so-called fin divider, which has a very simple construction and whose high pressure connection is in the relay piece 2, is characterized by a very safe mode of operation. Its weight as well as its manufacturing costs are low and its composition can be implemented very quickly.

The embodiment enlift Figs. 4 and 5 is worthy of note in that the high pressure seal '5 here takes the form of a non-bendable ring' and that the lower position ends in a chest piece f-6 which carries the head 18. A single opening 57 is provided. at the channel 1? entrance. In hibernation, this opening 57 is located in the middle of the side face of the seal 55, whereby it is strengthened.

In this embodiment. the core portion 24 contains a cylindrical groove into which one end of a spring 25 is inserted. This allows enlargement of the displacement path of the rod as well as possible enlargement of the spring 25 or a more compact unit being obtained.

In the embodiment of Figs. 6 and 7, a thicker sealing ring 60 is provided for the high pressure seal, scm is analogous to the above sealing ring 55, however, the retaining ring 59 for the sealing ring 60 is provided on the side of the reservoir 43. Their ring 59 is pressed into a recess 61, which is in communication with the extension 13 · This disposition allows the use of a sealing ring 60 with a larger diameter than the recess 6, which is advantageous for the sealing relationship.

As in the mouths, in this embodiment, does channel 1 appear? in a chamber 62 of larger dimensions, into which the converging portion 36 of the nozzle 9 extends, for what reason does 1 lie? s, later.

The atomizer is provided with your high pressure seal of bending type corresponding to the m; the first ul of the mold (Figs. 1-3) and the atomizers with the high-pressure seal yarns 55 and 60, in which the atomizer valve - slides, so as to be the same. the other two embodiments prepared in Figures 4-7 show different dynamic characteristics, son. for these atomizers, completely specific technical properties are achieved, which allows the choice of one or the other embodiment according to the technical effect sought.

Assuming that the medium is e in liquid, in the first embodiment, the closure of the opening propellant takes place before the media, while the opposite occurs at the closure of the closure, as shown in Fig. 8, where the ordinate D has been drawn. up the amount dispensed by the atomizer (i.e. gram / sec) and on the abscissa for the distribution valve path (; eg in mm).

He notices that by using different presses of the pushbutton 8, through use, the efficiency of the atomizer can be changed, ie. the ratio of the fuel market to the amount of atomized medium.

Actual"; the operations emit the following masses:

1st Impressions 0 - 0, J mm: no exit;

2nd Impressions 0.3 - 0.6 mm: only propellant emissions to oohs with a maximum amount of 0.6 mm (0.120 grams / sec);

3rd Impressions 0.6 - 1 mm: doivmede only. flow out further (in a constant amount of 0.120 grams / sec);

4th Impressions 1 - 1.6 mm: the propellant is still flowing out in maximum volume, the medium is sucked and atomized in an amount corresponding to the pressure button's pressure path close to 1.6 mm (from 0 - 0.360 grams / sec);

5th Over 1.6 mm impression way past the finely divided amount of art species at its maximum.

When the pushbutton is raised again, they will reverse the reverse process. This condition has the advantage that the bag contained in the nozzle is completely atomized.

When you press the push button again, the "distribution" is in from the beginning and thus contains no major small drops.

The only drawback for the user is that the atomizer must push down the iro button all the way down, otherwise the atomizer's efficiency will be less than the maximum that can be achieved, in that the propulsion stock is emptied faster than the stock of them "; medium, which is to be carried, and the container 47 thus cannot be completely emptied.

In the second and third embodiments described above, different dynamic conditions can be achieved according to the positions of the high and low pressure seals in relation to the associated openings, in which the thickness of the high pressure suction also plays a role ..: , the passage of the propellant takes place only after low opening of the closure. You have, for example, following procedure (Fig. 9).

1st Impressions 0-1 mm: greasy exit;

2nd Impressions 1-1.6 mm: opening of the passage for the medium, but no exit;

3rd Impressions 1.6 - 1.7 mm: the passage for the medium is completely open, but they^- no one is yet in division; ·

4 · Impressions 1.7 - 2 mm: media for stays open, the propellant for the gas is opened successively to finally achieve a maximum atomization of 0, 4f'O grams / sec;

5th Over 2 mm intakes of pressure, the maximum amount of atomization remains constant.

If the pushbutton is raised again, the opposite function of the function was carried; Finishing is discontinued from the moment before the closure of the gas supply.

The degree of operation remains constant and the emptying of the container 47, which contains the atomizer, is complete.

Since in this disposition the resistance is practically constant to the push-button's impression, there is practically no risk of the fines being handled: with reduced · efficiency.

This mode of operation is what brings about the greatest savings in terms of propellant; on the other hand, where the mt dium to be atomized is sucked up to the last moment before the interruption in the di-liquid still flow, the liquid to be atomized remains, after the closure of the closure in the supply, which acts so that at the beginning of your . next droplet phase small droplets are sprayed.

According to a further mode of operation of the invention using the high pressure seal of the type, the openings for the propellant and the liquid to be finely decomposed so that the first begins to flow out shortly before the opening of the medium passage, in other words (Fig. 10 ) that the opening phase G (the distance h 2 / h 2) for the propellant passage and the opening phase E (the distance h 2 / h 2) for the liquid passage mutually overlap the goods.

Under the cessa holder, the passage of the medium is completely cleaned in the wear of each turning period of the propellant, and there is then. Long risk for? Simply dropping is dropped out by the nasal atomization process.

Of course, it is advantageous to reduce the length of the impression distance h₁ feed the valve as much scm as possible.

According to yet another aspect of operation, which is preferable to the above-mentioned, one can suppress the formation of small droplets and at the same time reduce the consumption of drugs.

In fact, it is possible to open the passage for the propellant shortly after opening the passport; the particle for the liquid to be atomized as shown in the diagram in Fig. 9? unless the following conditions are met:

- Arrangement of the high pressure seal and in particular the opening 57 such that no significant pressure loss occurs during the passage of the gaseous propellant through passage 17 of distribution valve 7. This result can be achieved if the opening 57 in

In the bar 7, a passage cross section, which is substantially larger than the inlet of the nozzle 9 (e.g. 2-8 times larger).

• Announcement of a sufficient gas pressure with low pressure (close the ring and nozzle 9? Which can be achieved), since the chamber 62 in the embodiment according to Fig. 6 and 7 ·

Therefore, this chamber should be kept in such a content that the evaporation time is the same. propellant gas under pressure, which is in the duct 17 and in the chamber 62, is minimized¹ one is equal to the sum of the time sections required on one side of the path of the rod 7 from the closing position to the opening position of the liquid to be atomized, and to anchor the side of the nozzle blowout (cleaning), whereby the later time section is very short, t .ex. in the order of 1 / 1J second.

Of course, at high pressure sealing with the sealing seal, it must always be ensured that the aperture 57 in the sealed position is closed to provide the seal f&gt; 0, to prevent the passage of medium contained in the recess 5, from here to the channel 17I, the improved embodiment of FIG. 11 in the seal for the high pressure shut-off valve arranged in a recess 65 in the intermediate piece 2. This recess is directed to the reservoir 43 for the propellant, which reservoirs may consist of e.g. metal, including aluminum. The seal in the cavity in the front line 65 of your retaining ring 66. The latter consists of a specially made conical sleeve and has a central opening 67, into which the valve rod 5 conical head 18 penetrates.

The holder assembly 65, which ensures the attachment of the seal in the seal 1h, is pressed into a cylindrical hole 7θ in the interior of the intermediate piece; 2 and is wedged between an annular bead 68 at the periphery of the intermediate yoke 2 and the bale 69 of the reservoir 43. The end portion of the neck is folded around the circumference of the cingulate bead 58 and around a bead 71 of the same diameter as the ring 66, so that their shape is closely followed.

For the ring 66, a sufficiently weighted material was selected so as to obtain, through the crease of the neck 69, a tight lining between the reservoir 45 and intermediate yoke 2. On the other hand, it is also desirable to select the dairy ring and the intermediate yoke 2 in a convenient manner so that a tight connection It is held to contain the propellant in the reservoir 43 · This avoids a loss of propellant due to the permeability of the ring 66 and the intermediate piece 2.

It is noticed that such a fast and sounded; mounting of the device is feasible and that the intermediate piece 2 as well as the tube 66 is easily manufactured by the design of plastic.

As shown in Fig. 12, the rod 7 of the valve has on its outer surface a number of longitudinal grooves 72. On the other hand, the pressure knob 1, which covers the atomizing valve 7, carries? down to two concentric sleeves: An outer sleeve 73, into which the rod is properly inserted, and an inner sleeve 74, which engages the tapered end 75 of the valve rod with channel 17 for the propellant. The groove of the rod 7 penetrates into the sleeves and 7 / .. heifer. as is an annular projection 76 which is anorexia viii. the longitudinal readers 7² base. When the song is pressed into the sleeves 73&gt; ch 74, the strips 72 limit to; ammans with high in 73 channels 77 in the medium.

Man sk; It should be noted that, by this concept, the valve song can be set particularly easily through molding (eg casting or pressing).

Figure 13 shows a^- the valve rod 7 has an annular shoulder 78 and a conical surface; 79,^SCM CWait; with the sealing ring 4 · From the side 81 of the shoulder 78, facing away From the sealing 4, is even and serves as a support for the return spring 25, which may also be a good stop for the push-button. For this purpose, the interior of the recess 6 is radially fixed; appropriation; .82. The contact between the surface 81 and the stop 82 is thus restricted to the floor. press! · nut 8 int jerk st sufficient a.

In the embodiment according to FIG. 14, the retaining ring 83 for the seal 15 is a holding breath cell of the tear fluid reservoirs 43 neck. This container is offered here¹ of a me; allel holder, which is extruded to the neck. The bottom 84 is welded to the container's sleeve; 1 around this. This design step is simpler than that at which the needle of the needle is phased in the weld; at its mantle. In order to insert the phase 5 spacer at the reservoir z3, the neck 83 of the container is by means of an annular abutment 85 forged on the base 86 at the lower end of the cutter piece. It should be noted that in their construction, the intermediate piece consists of a single piece.

Different variants are possible, the folding of the reservoir 43 on the intermediate piece 2 In the embodiment shown in Fig. V, the intermediate element 2 is solid, in the case of renunciation. The neck 87 of the chamber 7θ of the fester reservoir 43 is folded back so that a double-walled girdle 88 is inserted, which is folded into your annular groove 89 at the edge of the intermediate piece Ti .1 the bead 88 is closed · from a cone-shaped portion 94 which penetrates into a colic recess 92 in the intermediate piece 2 and with its upper end clamping the sealing ring 15.

A reverse disposition is shown in Fig. 16, where the seal 15 is reached by a wrap; 94 sv reservoir 4? conical neck 95 · The outer wall of the fold 94 is folded on flour.¹ the annular bead of the piece 2 9θ · The pasting is made: 'woolen fabric&gt; through an inf; Icing of the outer wall of the wrap 94 in the chute of the ll piece

89.

In the embodiment of Fig. 17, the neck of the reservoir is made of a plastic, which is naturally impermeable to the propellant medium. The reservoir's two parts, the main and the other part, are welded together with each other along the decrease_t The edge 96- The neck 95 is otherwise in shape, scm is comparable to the retaining ring 66 in the embodiment according to Fig. 11. The neck 95 has a special e: in cylindrical shoulder} 8, with the latter being injected into the cavity 76 in the spacer 2. The grant is secured by an employee? 97, vic whose part 95 95 and 2 are welded to the varicose, e.g. using ultrasound d. Use¹ of a plastic reservoir can solve the problem of the reservoir corrosion, either through the propellant or through the meclite present in the y;

It will be appreciated that the scope of the invention is not limited to the described embodiments, but further embodiments are conceivable.

11.