DE2734387A1 - DELIVERY DEVICE - Google Patents

Description

8 The Broadway, Oadby, Leicester, England

Dispenser

Priority: July 30th, 1976 / England registration number: 31798/76

The invention relates to dispensing devices for flowable substances.

Dispensers for pastes are already known in which the paste is contained in a resilient bag which is arranged in a housing and one end of which is in communication with an outlet in the housing, while the other end of the bag is connected to a rotatable element so that it can be rotated to remove the paste from the outlet to squeeze out. Since the bag tends to shorten when it is twisted, there are already various compensating devices have been proposed which allow axial movement of the twisted end of the bag during the rotational movement of the rotatable element is transmitted. It is important, however, that the twisting should start from the end remote from the outlet should be done and gradually continued along the pouch

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should be so that essentially no material remains in the twisted portion. To make very strong viscose fabrics, like Mastic, to be able to squeeze out or to spray a liquid to be able to develop high pressures, and it It has been found particularly important that the twisting of the bag be controlled especially in the early stages must if an effective expulsion or squeezing of the material and sufficiently high pressures are to be achieved.

In French patent specification 1 161 905 there is a freely hinged one Buckle is shown connecting the end of the bag to the rotatable end member so that the buckle that starts at the beginning rests flat on the end link, is lifted from the bag when it is twisted. With this arrangement, however, this will be the case twisting end of the bag is essentially not held, especially not in the initial stages, making the twisting irregular and is not centered.

U.S. Patent 1,491,860 shows other balancing devices. In one, a helically wound spring is provided which connects the end of the bag to the end of the housing. In the other, the rear end of the bag is held in a small opening in a resilient disk at the end of the housing so that it can be pulled through the opening when the bag is rotated. However, the use of a 1st resiliently stretchable compensating element, such as a spring, not satisfactory, because if the spring

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is sufficiently stretchable, it does not hold the pouch under sufficiently strong axial tension in order to be able to control its rotation sufficiently and also has a tendency to rotate absorbing too much energy and also prevents high pressures from developing. The arrangement with resilient Washer, in turn, does not hold the end of the bag tight enough to transmit the high torsional forces and to hold sufficient axial tension in the bag to achieve high pressures within the bag.

In the U.S. Patent Specification 2 203 313 is a balancing device which has a resilient plate to the center of which the rear end of the resilient bag is attached is. The plate is slotted on the inside so that the middle area of the bag can be pulled upwards in a resilient manner, if the bag shortens when twisted. This has the same disadvantage as the spring described above, and moreover is it is not possible to transmit a high torque in order to generate a high pressure in the bag without the risk of a There is deformation or breakage of the plate at one of its many weak points.

The invention is based on the object of creating a dispensing device for flowable substances in which the flexible container is rotated in an orderly manner and at which high pressures can be generated in the flexible container.

The solution to this problem results from claim 1.

The invention is based on the surprising finding that in order to achieve high pressures in the bag, any inadequate resilience in the system should be avoided. Although, for example , a bag made of rubber or other resilient material would be expected to perform best

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would show because it would allow a pressure build-up and would store the twisting energy, it has in fact been shown that a bag made of a non-stretchable material gives much better results. Another important consideration is that the compensation element is not only suitable should be to transmit a high torque, but should also meet two other requirements. First of all, it should offer enough resistance to axial elongation, to keep the twisted rear end of the bag straight and to ensure that the twisting is even and effectively progresses from that end of the bag. Second, there should be one if it's the back end of the bag allows axial further movement, this in a substantially non-durclv-resilient manner, so that the applied Torque is not absorbed, nor should there be any increasing axial tension exerted on the bag when it is in the Housing continues to rise, which would be the case with a spring.

As a material for the bag, a polyester film offers the desired high tension properties or tensile properties and Non-stretchability, although other fabrics are undoubtedly suitable and more will be added in the future.

Two distinct forms have been found suitable as the balancing device, both variations of the one disclosed in U.S. Pat. U.S. Patent 1,491,860, although they

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actually not developed from these. In one form, the end of the pouch is to a flat rear end or Tail end shaped, which is firmly gripped in a stiff slot so that the fixed slot does not yield., Although the End can be pulled through the slot when a sufficient force is applied. It would be different with a slotted rubber washer. Even with high torque, the firm grip remains just as effective, and the high torque can be used with great Effectiveness can be applied. In the other form, the rear end of the bag is attached via a spiral link, which can expand axially in a substantially non-resilient manner, but on the other hand this expansion a considerable Opposes resistance. This resistance can be based on the thickness of the material of the spiral, e.g. thicker Steel wire, or it can be due to the shear resistance of a plate in which a spiral line of weakness is formed from which the coil is gradually torn off. The helical device can have a high torque in the direction transferred to the spiral without a great risk of impermissible deformation or breakage.

A particular advantage of the invention is that it makes it possible to build up a sufficiently high pressure in the bag, so that there is an effective, fine spray of a liquid similar to an aerosol spray. With a preferred one AusfUhrungsbeispiel the invention is therefore a manually operated Valve in the outlet channel and a spray nozzle at the end of the

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Channel provided.

The following is the invention with further advantageous Details are explained in more detail with the aid of schematically illustrated exemplary embodiments. In the drawings shows:

FIG. 1 shows a longitudinal section through a first exemplary embodiment of a dispensing device;

FIGS. 2 and 3 are perspective views of two different forms of a compensating element for the dispensing device;

FIG. 4 shows a longitudinal section through a second exemplary embodiment of a dispensing device;

FIG. 5 shows a longitudinal section through a third exemplary embodiment of a dispensing device;

FIG. 6 shows a longitudinal section through a fourth exemplary embodiment of a dispensing device;

FIG. 7 shows a perspective view of the lower part of the exemplary embodiment according to FIG. 6 in an exploded view;

FIG. 8 shows a longitudinal section through a fifth exemplary embodiment of a dispensing device;

Figure 9 is a perspective view of an alternative floor arrangement the dispensing device according to FIGS. 6 and 8 in an exploded view.

As Figure 1 shows, the dispensing device has a strong,

flexible, bag-like container 10, the a liquid,

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ζ.B. contains a water-based insecticide that sprays out shall be. The bag expediently consists of Polypropylene or "Melinex" (trademark) polyethylene terephthalate - Foil material. The container is in a rigid, tubular, expediently made of plastic

one in

housing 2 arranged. The edge of the case is in / a as plastic Ormstück formed dispensing part 11 provided annular groove 12 received, and the open end of the container 10 is bent outward over the edge of the housing and held between the housing and the dispensing part. The delivery part is provided with a discharge channel 14 for the liquid which has an inner conical end 16 which opens into the housing. in the A valve 18, which can be controlled by a spring-loaded plunger 20, is arranged in the delivery channel 14. On the outside A nozzle 21 is attached to the end of the delivery channel 14.

The lower end of the housing 2 carries a rotatable end forming cap 32 by a flange formed thereon 30 is held, which is inserted into a groove 29 of the housing. On the outer surface of the lower end area of the housing ratchet teeth 31 are provided, and correspondingly shaped ratchet teeth 33 are formed on the inside of the cap. The ratchet teeth are resiliently engaged with each other and preferably have a sawtooth profile in cross section, so that the Cap can be rotated in one direction while the teeth resist one rotation in the opposite direction

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Afford. The cap is connected to the lower end of the container 10 by a compensating element 40 which is hooked into a tab 38 on the cap and into a ring 42, which is attached to the lower end of the container in that the lower end of the container 10 forms a loop, which is gripped by a back clamp 44 and sealed. -

In operation, the cap is rotated in order to twist the lower end region 41 of the container and thereby compress the liquid which is emitted as a spray jet from the nozzle 21 when the plunger 20 is pressed down.

The compensating element 40 has the shape and shown in FIG has a piece of wire which is bent over in the shape of a hook at its ends 23 »25 and wound into a spiral 27. The material of the wire is permanently deformable, so that the hook-shaped ends can be pulled apart when at continued use of the dispenser, the lower end of the container migrates upward within the housing. However, the wire material must accommodate the axial movement of the container Oppose resistance and be able to transmit the rotational movement of the cap to the lower end of the container. in the In general, a wire made of mild steel or soft iron with a diameter of 2.6 mm or is suitable for this purpose of 1.9 mm (12 SWG or 14.5 SWG); but a thinner wire can also be used, for example 1 mm (19 SWG) for smaller ones Packaging to be appropriate.

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FIG. 3 shows an alternative form of a compensating element AO, in which the cap 32 expediently has an end wall made of plastic or metal, which is provided in the middle with a loop or eyelet 35 through which the lower Out end of the container and to which it is attached. The end wall is in the form of a spiral with a score line 39 Tear line provided. When the cap is rotated, the rotational movement is transmitted to the end of the container and from the container axial tension is applied to the cap which provides some degree of resistance to tearing along the score line opposed. But with sufficient force, the cap will gradually tear along the score line and form a tear strip in the form of a spiral. This corresponds essentially to the device shown in FIG. But the one created in this way Spiral 27 has the shape of a flat band made of metal or plastic and is better suited to transferring rotational forces, However, it has minimal resilience in the axial direction.

In the exemplary embodiment shown in FIG. 4, the dispensing device has a bag-like container 10 which, for example, contains a paste such as spreadable mustard. The container is arranged in a rigid, tubular housing 2 of plastic, which has a substantially cylindrical tubular portion 13 in a narrower neck portion

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Passes over, which forms the outlet from the housing. The neck area is provided with an outwardly facing annular rib or flange 17 at its extreme end. the upper opening of the container 10 is placed around the flange 17 and by the engagement of a cooperating with the flange, annular recess 19 in the dispensing part 11 in place and Place held. A delivery channel 14 for the contents of the container is provided in the nozzle element. When not in use, the outlet opening can be closed by a correspondingly designed plug 27 '. The lower end of the case is provided with a cap 32 which corresponds essentially to the cap according to Figure 1, except that here in place of the two Sets of interacting ratchet teeth only on the inner, cylindrical one Surface of the cap teeth 34 are formed, which cooperate in the manner of a latching device with humps 36, which are provided at regular intervals around the outer surface of the housing. The lower end of the container 10 is with connected to the cap via a compensating element 40 which is essentially similar to that shown in FIG.

In this embodiment, the cap can be in both directions be rotated, the teeth and cusps merely resisting the rotational movement. If there is enough content from the If the container has been squeezed out, the cap can be turned a little bit in the opposite direction before the stopper is again is placed to relieve excessive pressure in the container and to prevent the plug from being pushed out.

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The exemplary embodiment shown in FIG. 5 essentially consists of a combination of two dispensing devices according to FIG. 4. A single housing 2 contains two separate dispensing parts 11, which are supplied by separate, bag-like containers 10 within the housing. The lower ends of the two containers are closed and jointly connected to a single compensating element 40, which connects to a single rotatable cap 32. The two containers contain separate substances that are to be dispensed at the same time and in the same proportions. This can typically be a two-component adhesive. The dispensing parts are arranged in such a way that the two substances are dispensed in the direction of one another. In this embodiment, the neck of each container 10 is shown sealed to the inner surface of the neck portion 15 of the housing rather than being wrapped around the flange 17.

With the exception of the compensation arrangement at the lower end of the bag-like container, that shown in FIGS. 6 and 7 corresponds Embodiment essentially the embodiment according to Figure 4. In this case, however, is the lower end region of the container 10 is twisted in the area 41, and its extreme end is shaped into a flat tail end 43, which of a folded metal clip 45 can be sealed, which also serves as an end stop. The tail end protrudes a triangular hole 47 in a transverse wall 49 of the cap and is held in the hole by a wedge 51. Hole 47 has an

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jumping groove 53 »which is intended to receive the tail end 43, and the wedge 51 has retaining shoulders 55th hole and wedge 51 are shaped to fit into one another so that the tail end 43 is between the wedge 51 and the groove 53 is held to the desired extent with frictional engagement. The cap extends (as Figure 6 shows) below the Transverse wall 49 and is provided with a groove 57 in which an end-closing plate 59 is received, which Tail end 43 holds and hides. Initially, when the container is filled with the material to be dispensed, is as much as possibly contained by the tail end 43 in the space between the transverse wall 49 and the plate 59. By rotating the Cap, the tail end of the container is twisted as the wedge 51 prevents it from rotating relative to the cap. at Continuous rotation of the lower end of the container will squeeze out the contents when the stopper 27 * is removed has been. When the required henge has been delivered, the cap is turned a little in the opposite direction and the Plug put back on. The frictional engagement exerted on the tail end 43 by the wedge is selected so that the tail end can still be pulled from the container through the transverse wall 49 in order to compensate for the shortening of the container when it is rotated.

FIG. 8 shows a modification of the exemplary embodiment according to Figure 6, similar to the embodiment shown in Figure 5, in which two containers are arranged in the housing, each of which is

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deliver separated substances to the associated delivery parts. The lower ends of the two containers are twisted together and as a single tail end passed through the transverse wall.

FIG. 9 shows a modification of the cap arrangement at the end, which is suitable for the exemplary embodiments according to FIGS. 6 to 8 is. In this modified embodiment, the cap 32 is molded from plastic and on the housing 2 in the already described manner attached. It has diametrically opposed noses 50 which are provided with openings and in which end regions of a split pin 52 are received. The tail end 43 The container is threaded through the slot in the cotter pin when it is assembled and is in frictional engagement between the Legs 54 of the split pin. A lid that fits over the cap 32 56 for the end of the assembly obscures the tail end. As in the previous embodiment, when turning the cap to rotate the lower end of the container, axial tension is built up, which the tail end between the legs 54 of the Pulls splints through. The legs thereby exert frictional engagement with the tail end, thereby transmitting the rotational movement to the container, and to a limited extent counteract the movement of the tail end between them.

As an alternative to the arrangements described above, the rotatable element can also be provided at the dispensing end, wherein the dispensing opening is provided in the rotatable element, which connected to the flexible container while the other

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End of the container over a compensation element with the other End of the housing is connected. But when the pressure in the container causes the container to stick to the sides of the housing is applied, the rotatable element should be arranged at the end of the housing remote from the outlet.

The arrangement according to FIG. 1 provided with a valve in the outlet can also be provided in other exemplary embodiments, even with arrangements for dispensing pastes or viscous substances, although no spray nozzle would be used. Both Embodiments with double bags can simultaneously actuate valves in the two outlets by a single plunger be. One bag could contain a liquid and the other a gas or a highly volatile liquid, so that the two jets collide, the gas or the finely divided liquid jet for atomizing the other liquid jet would serve.

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Claims (7)

L 533 M. Expectations M.J dispenser for a flowable substance with a rigid, tubular housing that has a dispensing opening at one end and carries a relatively rotatable element, the axis of rotation of which extends in the longitudinal direction of the housing, and a flexible container for the flowable substance which is located within the housing in communication with the dispensing opening arranged and attached to one end of the housing and at its other end to the rotatable element on the axis of rotation is connected, whereby when the rotatable element is rotated, the end region of the flexible element remote from the dispensing opening The container is twisted, which causes the flowable substance contained therein to be dispensed from the dispensing opening while the end of the flexible container remote from the dispensing opening is secured by a compensating device which, 'during they transmit the rotation of the rotatable element to the end of the flexible container to the neighboring one End of the container allows to move axially towards the dispensing end, characterized in that the flexible Container (10) made of a high (tensile) strength, but essentially inextensible material, and that the compensating element (40) the twisted end region (41) of the container allows axial movement toward the dispensing end in a substantially non-resilient manner; but this one Movement provides sufficient resistance to the twisted end portion substantially along the axis of the rotatable 709885/1060 ORIGINAL INSPECTED L 533 M. 2734337 Elements (cap 32) to hold. 2. Dispensing device according to claim 1, characterized in that the compensating element (40) has the shape of a as a spiral (27) formed connecting element, which torque from the rotatable element (cap 32) on the container (10) can transmit, and its ends, one of which is with the rotatable Element or the housing (2) and the other is connected to the container (10), in a substantially non-resilient manner resilient manner axially movable apart, but with the apart movement of the ends considerable Resistance is opposed. 3. Dispensing device according to claim 2, characterized in that the compensating element (40) is a spiral (27) is made of a substantially non-resiliently resilient wire, the hook-shaped or loop-shaped bent ends (23, 25) has. 4. Dispensing device according to claim 2, characterized in that the compensating element (40) is formed from a flat material in which a spiral is cut which allows the center of the spiral to be displaced out of the plane of the material in order to create axial compensation , and that the. Rotational force is transmitted through the thus formed Spi rale (27) in the form of a flat band. 70988S / 10I0 L 533 M. 5. Dispensing device according to claim 2, characterized in that that the compensating element (40) is formed from a flat material in which a spiral-shaped, tearable score line (39) 30 is formed that the middle the spiral is displaceable out of the plane of the material in order to effect the axial balance and that the rotational force of the spiral (27) thus formed is transferred from a flat strip of material, the resistance of the material to shear some degree of resistance to the axial forward movement of the twisted end portion (41) of the flexible container (10) offers. 6. Dispensing device according to claim 4 or 5 »characterized in that the spiral (27) in a transverse wall of the rotatable member (cap 32) is formed. 7. Dispensing device according to claim 2, characterized in that the compensating element (40) of a flattened one Tail end (43) of the container (10) is formed, which in a rigid slot (51,53) in the rotatable element (Cap 32) or resiliently held in the housing so that the rotatable end region (41) of the container (10) can be moved axially forward is when the axial force exceeds the holding force of the slot. 709885/1OtO