EP0787655B1 - Apparatus for emptying a sleeve-bag - Google Patents

Abstract

The rigid cap (11) has a rear cylindrical flange (13) for holding one end of the bag. The front of the bag (15) is supported by a transverse wall (12) with an outlet (17). Part of the sheeting of the bag is cut by a recess (16) starting from the transverse wall and connecting with the outlet. The recess contains at least one pin (18) whose point (19) facing the bag is set back into the recess in relation to the surface of the transverse wall supporting the bag. The height of the pin is less than half the depth of the recess. The recess with a transverse wall forms a sharp edge.

Description

A device for emptying a pasty mass containing tubular bag with the in the first part of the claim 1 features is known from DE 1 536 003 A. The tubular bag is supported there by a basket, in a cylinder receiving the tubular bag is used. When emptying the tubular bag enters the basket and is protruding from through the basket Piercing thorns.

DE 9 103 038 U discloses a further device according to the first part of claim 1. For breaking the tubular bag there serves a knife inserted into the device with a transverse to the radial direction of the tubular bag Surface. To empty the tubular bag is on whose rear end exerted pressure, extending through the bag contents continues and the front hose end against the oblique knife edge presses. This will make one at the front End of hose bag existing, running from the center to the outside Crease cut and opened the tubular bag.

For the proper fulfillment of their function in the The tube bag materials used in practice requires the known arrangements relatively sharp lancing or Cutting elements, which are usually only by separate metal parts let generate. This increases the cost of in the Usually designed as a disposable device.

Furthermore, if the tool is designed as a stationary element, so it is a complete piston feed to complete emptying of the tubular bag in the way.

In another, known from DE 3 826 887 A device the tubular bag is pierced by a spike, the one before emptying by a provided on the cap Manually inserted and afterwards must be pulled out again. This handling is not only cumbersome and time-consuming, but also carries the danger in itself, that the contents of the container leaks prematurely and the environment is polluted and / or inadmissible Is contaminated with foreign substances. In addition, the known device for use in mechanical dispensing devices not suitable.

The invention is based on the object, a device for emptying a paste containing a pasty mass Tubular bag to provide a safe opening and restless Draining guaranteed. In addition, the device should can also be used with machine-operated dispensing devices his.

The inventive solution to this problem is in the claim 1 marked. The fact that the breaking up of the Tubular bag means facing the bag Peak, which at the application of the evacuation pressure on the tubular bag overstretched film for Bursts, is a safe opening of the tubular bag guaranteed even with difficult-to-use films and pastes. The further fact that the tip was emptied Condition of the tubular bag over the tubular bag supporting Transverse wall does not protrude significantly, allows a complete emptying.

The embodiment of the invention according to claims 2 and 3 is efficient in its operation and at the same time in the production unaufwendig.

In the embodiment according to claim 4 may during application of pressure on the rear end of the bag a depression located part of the tubular bag film in the Deform dent into it until it is the most overstretched middle area of the foil is the tip of one in the Well arranged mandrel reached and thereby bursting is brought. The bursting of the overstretched film leads - what favorable for an unhindered dispensing of the bag contents is - to a much larger opening than they through mere piercing or achieved by cutting with a knife becomes.

The fact that the spike tip is in the deflated state the tubular bag opposite the tubular bag supporting Querwand is set back, also allows a complete Emptying, since the spike does not get in the way of the dispensing piston stands. At the same time in this design is a transport protection, because without the minimum pressure required for opening the tubular bag can not reach the spike tip.

The embodiment of the invention according to claim 5 is in With regard to the smallest possible axial length of the entire Device cheap.

The developments of the invention according to claims 6 and 7 are intended to prevent the tubular film in their Expansion slips into the depression and thereby possibly not sufficiently overstretched to touch to break open with the spike.

The arrangement according to claim 8 is expedient in that as she ensures that the most bulging and stretched Part of the tubular bag film in contact with the Dornspitze is brought.

The developments of the invention according to claims 9 to 15 are characterized in that the cap bottom substantially can be flat, therefore a low-material component represents and still ensures a complete emptying is.

In the embodiment according to claims 10 to 13 is the tubular bag is opened from the top of a tube, the leaking paste directly into the outlet opening the cap passes.

The design according to claims 2, 12 and 15 has the Advantage that the entire device as a one-piece component can be produced.

Figur 1a und 1b einen Axialschnitt bzw. eine Stirnansicht eines ersten Ausführungsbeispiels einer Vorrichtung zum Entleeren eines Schlauchbeutels,

Figur 2 und 3 Axialschnitte durch ein zweites bzw. ein drittes Ausführungsbeispiel, und

Figur 4a und 4b einen Axialschnitt bzw. eine Stirnansicht eines vierten Ausführungsbeispiels.

Embodiments of the invention are explained below with reference to the drawings. Show:

1a and 1b shows an axial section and an end view of a first embodiment of a device for emptying a tubular bag,

Figures 2 and 3 are axial sections through a second and a third embodiment, and

Figure 4a and 4b an axial section and an end view of a fourth embodiment.

The device shown in FIGS. 1a and 1b consists of a cap arrangement which comprises two cap parts 11 , 11 ' integrally connected via a central part 10 . Each cap part has a transverse wall 12 , 12 ' , a circular-cylindrical flange 13, 13' pointing backwards (in FIG. 1a) and a circular-cylindrical trough 14, which is arranged in each case in the center and protrudes downward (in FIG. 1a) '14' up. In each cap member 11, 11 ' , the front end of a suitably sized tubular bag 15 , 15' is inserted and connected to the flange 13 , 13 ' . The trough 14 , 14 ' serves to accommodate the front, as closed by a clip tubular bag lobes.

The thus completed unit of cap assembly and two bags filled by the manufacturer with pasty masses is used for insertion into a device, such as in EP-A-0 492 413. The tubular bag will be doing so with their protruding from the cap assembly parts introduced into a double cylinder arrangement. By common Machine feed of pistons can be the two Pastes in one the aspect ratio of the two Hose bag apply appropriate mixing ratio.

In each transverse wall 12 , 12 ' is a forward (in Figure 1a down) facing depression 16 , 16' formed at the bottom of an outlet nipple 17 , 17 ' attaches.

The recess 16 is circular cylindrical in cross-section and surrounds centrally a mandrel 18 whose tip 19 is set back relative to the plane of the transverse wall 12 . Preferably, the length of the mandrel 18 is less than half the depth of the recess 16 . The mandrel 18 is located next to the opening of the outlet nipple 17th

In the mentioned circular cross-sectional shape of the recess 16 is a preferred embodiment. Depending on the film material, bag contents and number of mandrels 18 arranged in the recess, other, for example oval, cross-sectional shapes may be expedient.

At the bottom of the recess 16 ' two mandrels 18' are formed, which stand on both sides of the opening of the outlet nipple 17 ' . The tips 19 'of the mandrels 18' are compared to the plane of the transverse wall 12 ' reset. The recess 16 ' is, as shown in Figure 2, a total of approximately segmental.

During the first advance of the abovementioned pistons, the application pressure causes the part of the tubular pouch 15, 15 ' located above the respective depression 16, 16' to bulge into the depression until it reaches the mandrel tip 19 , 19 ' and thereby bursts open. The length of the mandrel 18 , 18 ' is dimensioned in relation to the depth of the recess 16 , 16' and taking into account the film material so that the mandrel tip 19 , 19 'is not touched until the film is sufficiently overstretched and when bursting as possible forms large opening. In this way, it is ensured that the tubular bag contents can flow unhindered into the depression 16, 16 ' and from there into the outlet nipple 17, 17' .

The recess 16, 16 ' forms with the surface of the transverse wall 12 , 12' a rounded as little as possible and - unless it is to be feared damage to the film - substantially sharp edge to hinder slipping of the tubular bag film. For the same purpose, the surface of the transverse wall 12 , 12 ' supporting the tubular bag 15 , 15' may be roughened and / or the film may be coated or otherwise provided with anti-slip means.

In an alternative (not shown in the drawings), the mandrels 18 , 18 'may also be so long that their tips 19 , 19 ' are aligned with the plane of the respective transverse wall 12 , 12 ' .

The apparatus of Figure 2 differs from that of Figure 1a and 1b in that the tubular bag scoring tip 29, 29 ' at the end of a tapered cylindrical tube 28 , 28' is formed, with its other end coaxially in the respective outlet nipple 27th , 27 ' protrudes and is integrally formed on these over a predetermined breaking point 26 , 26' .

When making and filling the tubular bags 25 , 25 ' , care is taken that they are loose in the region of the respective tube 28 , 28' and that the respective tip 29 , 29 ' does not bear on the tubular bag film or only with negligible pressure. As the dispensing pistons advance, this pressure increases until the tip scratches and ruptures the pouch. The tubular bag contents can then pour directly into the outlet nipple 27, 27 ' via the tubes 28, 28' forming the tip 29, 29 ' .

When the dispensing piston reaches the relevant point 29, 29 ', the further feed movement causes the predetermined breaking point 26, 26' to break and the tube 28, 28 'is now pushed into the outlet nipple 27 , 27' . In this way, a complete emptying of the tubular bag is ensured.

Taking into account the properties, in particular the toughness, the tubular bag films used for use and the properties, in particular the viscosity, of the tubular bag contents, the force required for destroying the predetermined breaking point 26 , 26 ' is to be greater than the force required is to burst the tubular bag film by the tip 29 , 29 ' .

In the embodiment according to FIG. 2, the tubular bags 25 , 25 ' -unlike in FIG. 1a-are provided with a closure drawn inwards, so that the troughs 14 , 14' provided in the embodiment according to FIGS. 1a and 1b are dispensed with. This leads to a simpler design of the transverse walls 22, 22 ', but may be less favorable from the point of view of the complete bag evacuation. Therefore, the trough-like configuration of the transverse walls used in the first embodiment can also be applied to the embodiment of FIG. Conversely, the design according to FIG. 2 is also possible in the embodiment according to FIGS. 1a and 1b.

The embodiment of Figure 3 is consistent with that of Figure 2 is largely identical, but the tubes 38 , 38 ' in this case to the cap parts 31, 31' are not formed on predetermined breaking points, but resiliently biased against the emptying direction. The bias voltage originates in each case from a spring 36, 36 ', which is supported on a projection 34, 34' provided in the interior of the outlet nipple 37, 37 ' .

Again, the force of the spring 36 , 36 ' is to be dimensioned so that when advancing the dispensing piston exerted by the tube tip 39, 39' on the tubular bag film pressure sufficient to score the tube bag and cause it to burst.

In the final discharge phase of the piston meets directly on the tube in question 38 , 38 ' and pushes this against the force of the spring 36, 36' so far into the outlet nipple 37, 37 ', that the tubular bag can be completely emptied.

In the embodiment of the invention according to FIGS. 4a and 4b, the tip 49, 49 ' acting on the tubular pouch film is formed at the end of a lever 48, 48' integrally formed on the transverse wall 42, 42 ' and in its unstressed position from the transverse wall 42, 42 'runs diagonally upwards. The tip 49, 49 ' is located in or near the axis of the respective outlet nipple 47, 47'.

When advancing the Ausbringkolben the respective tubular bag 45, 45 ' pressed against the tip 49, 49' , so that this in turn scratches the tubular bag film and causes it to burst. At the latest when completely advancing the dispensing piston sets the lever 48, 48 ' substantially flat on the transverse wall 42, 42', so that it is not a complete emptying of the tubular bag in the way.

In order to prevent the lever 48 ' in the right in the 4a and 4b cap portion 41', which is provided with the relatively thin outlet nipple 47 ' , the opening blocks, the lever 48' opposite to the representation in Figure 4b with respect to the axis the outlet nipple 47 'be slightly laterally offset.

In Figure 4a, the two tubular bags 45 , 45 'are shown without special end closures. They can be designed as in FIG. 1 a or in FIGS. 2 and 3, wherein the transverse walls 42 , 42 'can optionally be provided with trough-like formations similar to FIG. 1 a.

In the embodiments described above, the Cap arrangement for jointly receiving two each Shaped tubular bag. The invention is the same also applicable to designs in which a cap assembly provided for three or more bags or each of several Bags with a separate cap or only a single bag with cap is present.

Claims (15)

1. A device for dispensing a pasty substance comprising a film tube (15, 25, 35, 45) containing the substance and a substantially rigid cap (11, 21, 31, 41) having a rear cylindrical flange (13, 23, 33, 42) for receiving an end of the film tube, a transverse wall (12, 22, 32, 42) having a dispensing opening (17, 27, 37, 47), and a tip (19, 29, 39, 49) facing the film tube for rupturing the same, the film tube (15, 25, 35, 45) being supported in the forward direction by the transverse wall (12, 22, 32, 42) of the cap (11, 21, 31, 41),
      characterised in

   that the film tube (15, 25, 35, 45) is connected to the flange (13, 23, 33, 42) of the cap so that, upon application the dispensing pressure, the tube film is over-stretched and caused by the tip (19, 29, 39, 49) to burst, and

   that the tip (19, 29, 39, 49) does not substantially project beyond the transverse wall (12, 22, 32, 42) when the film tube (15, 25, 35, 45) has been emptied.
2. The device of claim 1, wherein the tip is formed on a spike (18) extending in the axial direction of the film tube (15).
3. The device of claim 2, wherein the spike (18) is arranged within a recess (16) provided in the transverse wall (12) and surrounding the dispensing opening (17).
4. The device of claim 3, wherein the tip (19) of the spike is offset from the plane of the transverse wall (12) supporting the film tube (15) into the recess (16).
5. The device of claim 4, wherein the height of the spike (18) is less than half the depth of the recess (16).
6. The device of any preceding claim, wherein the recess (16) and the transverse wall (12) together form a substantially sharp edge.
7. The device of any preceding claim, wherein the tube film and/or the surface of the transverse wall (12) supporting the film tube (15) is provided with anti-sliding means.
8. The device of any one of claim 3 to 7, wherein the recess (16) has a substantially circular cross-section substantially completely surrounding the tip (19) of the spike.
9. The device of claim 2 or 3, wherein the spike (18) is resiliently biased with respect to the cap (11) against the dispensing direction.
10. The device of claim 1, wherein the tip (29, 39) is formed by the chamfered end of a cylindrical tube (28, 38) which is coaxial with the dispensing opening (27, 37) and extends rearwardly beyond the plane of the transverse wall (22, 32).
11. The device of claim 10, wherein the tube (28, 38) is adapted to be moved by pressure in the axial direction to such an extent that its tip (29, 39) is substantially flush with the plane of the transverse wall (22, 32).
12. The device of claim 11, wherein the tube (28) is integrally formed on the cap (21) at an intended breaking location (26).
13. The device of claim 11, wherein the tube (38) is resiliently biased with respect to the cap (31) against the dispensing direction.
14. The device of claim 9 or 13, wherein the resilient force is so designed that the tip (19, 39) notches the tube film when the dispensing pressure is exerted but recedes when abutted by a dispensing piston.
15. The device of claim 1, wherein the tip (49) is provided at the end of a lever (48) which is formed integrally with the cap (41) and extends at angle with respect thereto.

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