WO1986004041A1

WO1986004041A1 - Hose bag package

Info

Publication number: WO1986004041A1
Application number: PCT/DE1985/000288
Authority: WO
Inventors: Günther KNIERIEM; Peter Michael Timme
Original assignee: Knieriem Guenther
Priority date: 1985-01-10
Filing date: 1985-08-17
Publication date: 1986-07-17
Also published as: AU4805485A; NO863573D0; NO863573L; SE8603365D0; SE8603365L

Abstract

The package (16) comprises a hose-shaped envelope consisting of a flexible material sheet intended to receive a pasty filler product such as a sealing material or the like, sealingly closed at both its ends. The package comprises a rigid and narrowing end member (22) which is arranged at the compressed end of the envelope shaped as a bottle neck and intended to the outlet of the product and presenting at its narrowed end a centred opening, close to the outlet extremity of the envelope. The end member is a cup which is terminated at its enlarged extremity by a cylindrical collar (30) which is rigidly and sealingly fixed to a non compressed segment of the envelope and which is terminated at its narrowed end by a cylindrical threaded nipple (23). The nipple is radially spaced substantially from the bottle neck-shaped part of the envelope and axially from the corresponding extremity of the envelope, thus enabling the free access of a cutting tool at the opening of the envelope extremity.

Description

Tubular bag pack

The invention relates to a tubular bag pack according to the preamble of claim 1.

To accommodate pasty filling materials such as sealing compound or the like. Currently mostly so-called Cartridges used.

The cartridges consist of a rigid tube, the head part of which often has a nipple for screwing on an emptying nozzle and in which a piston is provided on the inside for pressing out the filling material (see, for example, DE - GM 76 10 820) .

These cartridges have basic disadvantages:

- high costs,

- large storage, transport and waste volume,

- Great effort in filling and manufacturing, since tolerances can occur for pistons and cartridges that trigger curing or leakage of the filling material. A cartridge-like container is therefore already known (cf. DE-GM 82 00 415), which in its outer shape resembles a conventional cartridge, but has no pistons. The cylindrical peripheral wall of this container is compressible towards the front end of the container. In order to express the filling material in the container, it is inserted into a special emptying gun and pressed together.

This container is a tube that is crimped on the bottom instead of being folded. How the bottom is attached to the jacket when the jacket is made of film is left open.

The nipple is an integral part of the tube, as in the cartridge, which has bulging disadvantages:

- large storage and transport volume;

- great effort in filling and manufacturing the container;

- High sensitivity of the empty container to mechanical damage, so that a special protective packaging is required for transport and storage;

- expensive complex packaging.

Furthermore, a tubular bag pack is known (cf. D E - 0 S 28 24 847), in which the processing of the filling material (sealing compounds, etc.) is carried out with a specially developed emptying gun. The pack consists of a tube part, which is closed at both ends in the middle, so that it is sausage-shaped. The special emptying pistol requires a protective cap in the head area which is to be inserted in the front end of the pistol and is only intended to prevent the pistol head from becoming dirty.

Disadvantages are:

- Either the protective cap is only placed loosely on the tubular bag, which is difficult because the tubular bag is deformed when it is opened and is no longer round, but oval. especially low-viscosity filling material escapes and contaminates tools, hands and cap. Inclusions of air that lead to disturbances during emptying cannot be avoided.

- Or the tubular bag is as described by the nozzles. e t, which closes the nozzle from the inside when the opening rod is pulled out of the cap and in turn leads to air pockets.

In order to obtain a sufficient opening cross-section, it is often pierced several times; this can tear off the closure part, the nozzle clog and the flow of product is blocked. For filler beads of small thickness, a small nozzle opening and a correspondingly thin opening rod are required; in most cases the package is then opened beforehand as described above, since a wire or the like is not available. The main disadvantages are:

- no closed system;

- The film and cap are not tightly adhered to each other;

- Residual air can escape from the gun via the cap through the nozzle, the same applies to compressed air guns when the piston is not tight; both lead to severe processing disruptions;

- Since the film and cap are not connected, the film can slip into the cap when pressed and block the filling material outlet.

Open packs are not reusable; if they harden in the nozzle, the pack must be destroyed.

It is not possible to replace the nozzle separately. This leads to difficulties when e.g. B. must be changed from large caterpillar (large nozzle opening) to small caterpillar (small opening); Instead of just changing the nozzle, the entire package must be destroyed.

In addition, large consumers must maintain the selected opening cross-section of the nozzle if they process pack after pack quickly; Here the use of the same nozzle saves time and material, but this is not possible because the cap and nozzle form a unit.

Another use of the cap is expensive, the insertion of the new pack in the z. Partly filled cap is difficult and leads to the disadvantages mentioned above.

The piston of the pistol can only empty the pack up to the beginning of the cap; Due to the system, a cap is required for each pack, which leads to loss of product and high waste. Processing requires the special pistol and always reserve caps, since the cap is easily lost. ■

These disadvantages, especially the open system, have hitherto prevented enforcement, although soiling of the gun head itself is largely avoided.

Finally, a generic tubular bag pack made of flexible film material is only known from the literature (cf. US Pat. No. 3,152,727), which is closed or closed at both ends with clips and at one end with a frusto-conical collar for fitting a closure cap is provided.

The collar is glued to the conical part of the jacket which is rich in folds, which requires a great deal of adhesive in order to cover the fold channels only z. T. to bridge, and the application of the adhesive considerably difficult. Because of the fold channels, a tight connection between the collar and the jacket is impossible, furthermore the hold of the closure cap on the pack is impaired by the uneven, wrinkled connection surface. The poor hold of the collar on the jacket shoulder requires additional support of the collar with its upper bead on the underside of the locking clip. As a result, the collar often comes loose when or after the closure is removed, because the additional holder is then missing and the collar is only held by partial connections of the fold-rich connecting surface.

Since the upper edge of the collar lies directly on the clip, the collar must be cut through when opening the package, which is time-consuming and difficult to open, and also requires a corresponding cutting tool (saw, special knife); With simple scissors, as shown schematically (in the US-PS):, the opening of the package, ie cutting through the collar and jacket, is impossible. When opening, the retaining ring for the closure cap and the entire collar are often deformed, so that straightening of the collar is necessary and the holder for the closure cap is impaired. Opening the package leads to product leakage and heavy soiling; since the flexible pack can only be held on the body, pressure must inevitably be put on the pack can thus be exercised, even with great care when opening and severing the collar, filling material outlet and thus contamination and obstruction cannot be avoided, especially with low-viscosity filling material.

No air should remain in the tubular bag, which is assumed here for all the packs described, but can only be achieved if the already filled endless hose is constricted, in particular clipped, and separated into individual packs between the clips; it remains open how the frame on the bead gets under the metal closure; the collar edge has to be applied to the already filled package by an additional work step (rolling or upsetting), which is expensive.

The short closure part on the collar and the shape of the packing head do not permit processing by means of commercially available tubular piston pistols, so that a special pistol with a head part adapted to this pack is also required here. This pack is essentially intended for hand pressing and low-viscosity filling.

Other disadvantages are:

- narrowing of the cross section of the collar due to the folds stiffened with adhesive;

Jamming of the emptied, compressed hose jacket in the barrel of the gun, since the jacket cannot be picked up by the collar;

- Open packs can only be used if the leaks through the fold channels to the interior of the nozzle are not harmful, ie with many filling materials, open packs must be destroyed because the contents harden or spoil. This known tubular bag pack can therefore not meet the requirements for cheap, simple manufacture, tightness, storage stability, durability of the collar on the pack, reusability of opened packs with sensitive contents and simple, clean processing and use by means of common tubular piston pistols.

These considerable disadvantages of the known tubular bag pack have evidently prevented their implementation and spread, despite advantages over cartridges such as price, volume, waste, etc., and in spite of their becoming known as early as 1964.

The object of the invention is therefore to create a tubular bag pack which avoids the mentioned disadvantages of the known prior art and thus satisfies a need which has existed for a long time, moreover for a mass article, namely the following advantages alone or together:

- closed system,

- tightness and thus high storage stability,

- simple, inexpensive manufacture,

- easy, clean opening,

- Quickly replaceable, tight and firmly connectable emptying nozzle,

- high product yield, low waste,

- effortless processing mi ¹ means of conventional guns,

easy removal of the emptied, upset hose bag pack from the pistol, and

- Interim storage and reuse of opened packs with sensitive contents.

The solution to this problem according to the invention is achieved by the teaching according to the characterizing part of claim 1.

The advantages are in particular:

- The tight connection between the tubular bag jacket and the shell and, if applicable, between the shell and the emptying nozzle (claim 2) and, if appropriate, the vacuum sealing of the ends (claim 6) ensure the closed, tight system and the high storage stability.

- When opening the package, it must be held securely on the shaft of the bowl and therefore opened without applying pressure to the package. After removing the free protruding from the nipple z. B. clip closure or piercing the exposed jacket shoulder (claim 5) and attaching the emptying nozzle, the contents can be processed directly, preferably by operating a tubular piston gun, the hose Fold the jacket of the pack in the axial direction and completely build up in the shell at the end. The shell diameter is preferably significantly smaller than the inside diameter of the tube of the cattail pistol (claim 8), so that the emptied hose jacket pressed into the shell can be easily removed from the tube of the pistol.

- The completely pressed into the shell of the hose jacket (claim 6) enables an almost complete emptying of the package; this ensures minimal material waste.

- The easy replacement of the tightly connectable emptying nozzle (claim 2) ensures. Reuse of opening packs and reduces time and ι-.a ^; : Erialauf and strong in large consumers.

- Flat film from the roll for the hose jacket and two simple plastic injection parts as a bowl and emptying nozzle as well as two simple endings or closures ensure simple, inexpensive production. A prerequisite for a separating point protruding from the nipple is a corresponding design of the tube bag before the shell is set. This can be achieved in that the package is underfilled after being closed so that the volume of the filling material displaced from the end of the package when the extended end is formed can be taken up by the package.

The sealing of the sectional area of the packing ^* sendes offers a further advantage by additional securing Füll¬ guts against eventual destruction. Sealing is preferably carried out under vacuum (claim 6); by the subsequent pressure equalization, the sealing compound is pressed into the labyrinth of folds of the gathered foil material and thus a good seal is achieved; A sealing mass which is matched to the filling material is particularly advantageous.

The casing of the package according to the invention is regularly produced from plastic or plastic-coated metal foil, which should have good tear strength and good tightness, must also be insensitive to impact and pressure, and should be very flexible and plastically deformable.

Another advantage of the invention is that the empty volume for the production of the package requires little storage and transport effort.

The pack according to the invention is robust and does not require any special outer or protective packaging; handling is simple. Partially emptied packs can be stored and reused because of the tight connections (cf. ^ ben), so they do not have to be destroyed. The invention is explained in more detail with reference to exemplary embodiments shown in the drawing. Show it:

1 shows a finished tubular bag pack in the head area with a bowl and emptying nozzle in section (on an enlarged scale against FIG. 2 ff.);

Fig. 2, the tubular bag pack before

Put on the bowl (simplified schematic);

3 the pack before putting on the emptying

Nozzle (simplified);

Fig. 4 _ the finished pack in side view;

-

5 shows the pack after the emptying

Nozzle with the cap closed;

Fig. 6 the partially emptied pack in one

Emptying gun (simplified); and

Fig. 7, the partially emptied pack in the head of a

Emptying pistol, detailed in enlarged section.

According to i g. 1, the pack 16 essentially has a hose jacket 29 made of flexible film material with a bottle-neck-like end 24, separating point 40 located thereon, a clip closure 37 and an interface 38 sealed with a sealing compound 43. The package is still closed, the interface 40, which projects freely with the closure 37 from the nipple 23 of the shell 22, can be clearly seen. The connection surface on the cylindrical connection area 30 and 32 of the shell 22 and the casing 29 with the fold-free packing in this area, which only results in a tight and undetachable connection, is an adhesive here, could also e.g. be a weld. For the Her Pack function, a sufficient distance between the middle of the shoulder 50 of the pack and the clip closure 37 is expedient, which results in the length of the nipple 23 with the holding thread and the distance between the separation point 40 and the opening of the nipple 23. Am At the foot of the nipple 23, a sealing element 35 is provided for an emptying nozzle 26 in order to ensure a tight connection to the jacket 29.

Furthermore, in Fig. 1, another embodiment of the head region of the pack is shown in dashed lines if the tip-like emptying end 24 'only enters the nipple opening 23, ie does not completely pass through. In addition to the end 24 ', an opening point 40' is shown on the free shoulder of the pack, which must be opened here with an opening tool in the free space between the end 24 'and the nipple 23. This opening point is visible so that the risk of uncontrolled piercing and detaching of the clip 37 'does not exist. A sufficient distance between the inner wall of the nipple and the clip closure 37 'is expedient for the function of this embodiment of the pack, in order to easily reach the opening 40' of the shoulder of the pack. ig. 2 shows the shape of the closed tube bag 16 with the molded-on bottle-neck-shaped end 24 with the clip closure 37; The bottle-shaped neck 24 can be seen, which is inserted into the shell 22 and, after its introduction, projects beyond the edge of the nipple 23.

Fig. 3 shows the pack 16 before the Ent¬ empty nozzle 26 is placed on it

Nipple 23 can be screwed on, although other connections such as bayonet or snap connection would also be possible. The pack 16 can be supplied with the emptying nozzle 26 enclosed or screwed on; in the latter case, the empty nozzle 26 is first removed for use, the protruding closure clip 37 is cut off at the interface 40 and then the empty nozzle 26 is replaced, the pack 16 can then be emptied by means of a tubular pistol become.

^• *

F i g. 4 shows the finished tubular bag pack 16

Tray 22 and attached discharge nozzle 26.

F i g. 5 shows, as already shown in FIG. 3 mentions the tubular bag pack 16 with the emptying nozzle 26 unscrewed and the closure clip 37 separated at the separating point 40 with the remaining part of the pressing end 24; after unscrewing the emptying nozzle 26, the pack 16 is to be processed.

A pack 16, which is used as a discharge pistol in a commercial syringe-piston pistol 31, is shown in FIG. 6 and 7, namely in FIG. 6 shows the entire tubular piston pistol 31 with a push rod 34 and partially empty pack 16, while in FIG. 7 the head of the gun with opening pack 16 is shown in section. A piston 33 is moved in the tube of the gun 31 to the emptying nozzle 26 via the push rod 34, the jacket 29 is compressed, and the filling material emerges from the emptying nozzle 26. Visible - 15 -

are in F i g. 7 the tight connection point 30/32 and the free exit from the nipple 23 to the emptying nozzle 26.

Claims

EXPECTATIONS

Tubular bag pack (16) with

- a hose jacket (29)

- Made of flexible film material for holding preferably pasty filling material such as sealing compound or the like,

- each with a central, tight seal

- At both ends of the jacket (29) and

- A rigid tapered end link (22) that

- Is arranged on the intended, for emptying the filling, bottleneck-like, folded, emptying end of the jacket (29) and

- At its tapered end, a central opening near the

The emptying end of the jacket (29) has, - • e e c e n c e i c h n e t that

- the end link

- A shell (22) is the

- ends at its widened end in a cylindrical collar (30),

- The with a non-folded portion (32) of the jacket (29) is tightly and firmly arrested, and

- tapering into a cylindrical nipple (23) at its tapered end,

- which is spaced

- Radially substantially to the bottle neck-like emptying end (24; 24 ') of the jacket (29) and

- Axial to the relevant end (37; 37 ') of the jacket (29),,

- Suitable for unimpeded access of a separating tool to an opening point (40) of the jacket (29) end (FIG. 1). Package according to claim 1,

- With a closure link

- That can be connected to the end link (22), in that g e k e n n z e i c h n e t that

- the closure member

- A tightly connected emptying nozzle (26).

3. Pack according to claim 1 or 2, characterized g e k e n n z e i c h n e t that - the jacket (29), the shell (22) and the emptying nozzle (26) - are dimensioned for receiving in a conventional cattail pistol (31).

Pack according to one of the preceding claims, characterized in that the entieer end (24 ') of the casing (29)

- In the nipple (23) only enters (not fully penetrated) (Fig. 1).

Package according to claim 4, characterized in that

- the nipple (23)

- is spaced radially essentially to the emptying end (24 ') of the casing (29),

- Suitable for unimpeded access of an opening tool to an opening point (40 ') of an exposed jacket (29) shoulder (FIG. 1). Package according to one of the preceding claims, characterized in that - the tight seal at the emptying end of the casing (29) - has a seal (43, 43 ') applied under vacuum (Fig. 1).

7. Pack according to one of the preceding claims, characterized in that the shell (22)

- Is dimensioned for the complete absorption of the emptied compressed shell (29).

Package according to claim 7, characterized in that - the shell (22) with the completely accommodated, emptied, compressed jacket (29)

- In its outer diameter is smaller than the inner diameter of a conventional cattail pistol and

- The inside diameter has a jam-free game.