DE3500625A1 - Tubular bag package - Google Patents

Abstract

A tubular bag package having an outer tubular surface made of flexible film material to receive a preferably pasty product, such as sealing compound or the like, having in each case a central, tight termination at both ends of the outer surface, and having a rigid, tapered end member which is arranged at the folded emptying end of the outer surface which terminates in the manner of a bottle neck and is intended for emptying the product and has a central aperture near to the emptying end of the outer surface at its tapered end. The package is characterised in that the end member is a shell which terminates at its widened end in a cylindrical collar which is tightly and firmly bonded to a non-folded section of the outer surface and terminates at its tapered end in a cylindrical nipple which has a radial spacing substantially from the bottle neck-type emptying end of the outer surface and an axial spacing from the relevant termination of the outer surface, suitable for unimpeded access of a separating tool to an opening point of the end of the outer surface.

Description

Tubular bag pack

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

To accommodate pasty filling material such as sealant or the like. Currently predominantly so-called Cartridges used.

The cartridges consist of a rigid tube, the head part of which is often has a nipple for screwing on an emptying nozzle and inside a piston for expressing the product (see e.g. D E - G M 76 10 820).

These cartridges have fundamental disadvantages: - high costs, - large storage, transport and waste volumes, - great effort in filling and Manufacture, since tolerances can occur for the piston and cartridge, which can lead to hardening or cause the product to leak.

A cartridge-like container is therefore already known (cf. D E - G M 82 00 415), which in its external form is a conventional cartridge is similar but has no pistons. The cylindrical peripheral wall of this container is compressible towards the front end of the container. To get the product in To express container, it is inserted into a special emptying gun and squeezed.

This container is a tube that is borded on the bottom instead of folded will. How the bottom is attached to the mantle, when the mantle is made of foil, is left open.

The nipple is an integral part of the tube, like the cartridge, which has the following disadvantages: - large storage and transport volume; - great expense when filling and manufacturing the container; - high sensitivity of the empty container against mechanical damage, so that a separate one for transport and storage Protective packaging is required; - expensive complex packaging.

A tubular bag pack is also known (cf.

D E - O S 28 24 847), in which the processing of the product (sealing compounds etc.) with a specially developed special discharge gun. The package consists of a hose part that is closed in the middle at both ends, so that it is sausage-shaped. The special emptying gun requires a protective cap in the head area, which is to be inserted in the front end of the pistol and only one This is intended to prevent contamination of the gun head.

Disadvantages are: - Either the protective cap is only loosely attached to the b E-E-E-E-E-E-E-OPEN-OPEN-t e n t tubular bags put on, which is difficult because the tubular bag is deformed when it is opened and is no longer round, but oval; In particular, low-viscosity filling material escapes and contaminates tools, hands and caps. Air inclusions, which lead to malfunctions when emptying, cannot be avoided.

- Or the tubular bag is fed through the nozzle as described e ö f f n e t, which closes the nozzle from the inside when pulling out the opening rod out of the cap and in turn leads to air pockets.

In order to get a sufficient opening cross-section, more corn is often used stabbed; this can tear off the closure part and clog the nozzle and the product flow is blocked.

A small nozzle opening and are used for small-thick product beads a correspondingly thin opening rod is required, in most cases the pack Opened beforehand as described above, since a wire or the like is not available stands.

The main disadvantages are: - no closed system; - Foil and cap are not closely attached to each other; - Residual air can come out of the gun via the Cap escape through the nozzle, the same applies to compressed air guns in the event of a leak Pistons; both lead to serious disruptions in processing; - there foil and Cap are not connected, the film can slip into the cap when it is pressed out and block the product outlet.

Partially opened packs are not reusable if they harden in the nozzle, the package must be destroyed.

It is not possible to change the nozzle separately. this leads to to difficulties if z. B. from large caterpillar (large nozzle opening) to small Caterpillar (small opening) has to be changed; instead of just changing the nozzle, the entire package must be destroyed.

In addition, large consumers must have the opening cross-section selected once keep the nozzle if you are processing package after package in quick succession; 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 complex, the insertion of the new one Pack in the z. Sometimes the cap filled with filling material is difficult and leads to the top cited disadvantages.

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

These drawbacks, especially the open system, have prevailed hitherto prevented, although in itself a soiling of the gun head to a large extent is avoided.

Finally, a tubular bag pack of the generic type is made of flexible material Foil material only known from the literature (see. U S - P S 3,152,727), the closed or closed at both ends with clips and at one end with a frustoconical collar is provided for placing a closure cap.

The collar is glued to the conical, wrinkled part of the mantle, which requires a lot of glue to only z. T. to be bridged, and the application of the adhesive is made considerably more difficult. Because of the fold channels is a tight connection between collar and coat is impossible, the Hold the cap on the pack through the uneven, wrinkled area Interface impaired. The bad hold of the collar on the coat 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 off at or after Removal of the fastener, because then the additional holder is missing and the collar is only held by partial connections of the pleated connection surface.

Since the upper edge of the collar rests directly on the clip, the Collars are cut through when opening the pack, which is time-consuming and difficult to open, also a suitable cutting tool (saw, special knife) requires; with simple scissors, as shown schematically (in the US-PS) is opening the package, i.e. cutting the collar and coat, is impossible. At the The retaining ring for the closure cap and the entire collar are often opened deformed so that a straightening of the collar and the holder for the Closure cap is impaired.

Opening the pack leads to leakage of the product and heavy soiling; Since the flexible pack can only be held on the body, it must be absolutely inevitable Pressure on the pack be exercised, thereby letting yourself be Take great care when opening and cutting the collar of the product outlet and so that pollution and obstruction not avoid, especially with low viscosity Filling material.

No air should remain in the tubular bag, something here for everyone is required, but can only be achieved if the already filled endless tube constricted, in particular clipped, and between the clips are separated into individual packs; it remains open, like the frame reaches the bead under the metal fastener; the edge of the collar must go through one additional work step (rolling or upsetting) onto the already filled pack be applied, which is expensive.

Leave the short closure part on the collar and the shape of the packing head A processing by means of commercially available cattail pistols is not allowed, so that too a special pistol with a head part adapted to this pack is required here. This pack is then essentially for hand pressing and low-viscosity contents thought.

Further disadvantages are: - Narrowing of the collar cross-section by the folds stiffened with glue; - Jamming of the deflated, compressed hose jacket in the barrel of the pistol, as the jacket cannot be taken up by the collar; - Partial packs can only be used if the packs present through the fold channels Leaks in the interior of the nozzle are not harmful, i.e. in the case of many product materials opened packs must be destroyed as the contents harden or spoil.

This well-known tubular bag pack can therefore meet requirements for cheap, ease of manufacture, tightness, storage stability, durability of the collar on the Pack, reusability of opened packs with sensitive contents and simple, clean processing and use with common cattail pistols not meet.

These have significant disadvantages of the known tubular bag pack their implementation and distribution can be seen despite their advantages over cartridges, such as price, volume, waste, etc., and prevented as early as 1964 in spite of their becoming known.

One aspect of the invention is therefore to create a tubular bag pack, which avoids the mentioned disadvantages of the known prior art and thus a need that has existed for a long time, also for a mass-produced item, is satisfied, namely shows the following advantages alone or together: - closed system, Tightness and thus high storage stability, - simple, inexpensive production, - Easy, clean opening, - Quickly exchangeable, tight and firmly connectable Emptying nozzle, - high product yield, low waste, - effortless processing by means of conventional pistols, - easy removal of the emptied, compressed tubular bag pack from the pistol, and - interim storage and reuse of opened packs with sensitive contents.

The inventive solution to this object is achieved by Teaching according to the characterizing part of claim 1.

The main advantages are: - The tight connection between the tubular bag jacket and shell and optionally between shell and emptying nozzle (claim 2) and possibly the Vacuum sealing of the closures (claim 6) secure the closed, tight System and the high storage stability.

- When opening the pack, it is securely closed on the shaft of the bowl hold and therefore open without pressure on the package. After removing the free protruding from the nipple z. B. clip fastener or standing up the exposed Mantle-shoulder (claim 5) and putting on the emptying nozzle can the filling material directly be processed, preferably by operating a cattail pistol, wherein the tube jacket of the pack folds up in the axial direction and to The end of it is completely dammed up in the shell. The shell diameter is preferably clear smaller than the inner diameter of the barrel of the cattail pistol (claim 8), so that the emptied hose-jacket, which has been pressed into the shell, comes off easily can be removed from the barrel of the gun.

- Through the hose jacket pressed completely into the shell (Claim 6) an almost complete emptying of the pack is made possible; this ensures minimal material waste.

- The easy replacement of the tightly connectable emptying nozzle (claim 2) ensures the reuse of opened packages and reduces time and material expenditure strong with bulk consumers.

- Flat film from the roll for the hose jacket and two simple ones Plastic injection-molded parts as a shell and emptying nozzle as well as two simple closures or closures ensure simple, inexpensive production.

This is a prerequisite for a separation point protruding from the nipple a corresponding design of the hose bag before setting the trays. this can be achieved by underfilling the pack after sealing is that it displaced from the pack end when molding the extended end Volume of the product can be absorbed by the pack.

The sealing of the cut surface of the pack end provides one Another advantage through additional protection of the contents against possible spoilage. Sealing is preferably carried out under vacuum (claim 6); through the subsequent Pressure compensation is aie sealing compound in the fold labyrinth of the gathered film material pressed and thus achieved a good seal; A sealing compound is particularly advantageous, which is matched to the product.

The jacket of the pack according to the invention is usually made of plastic or plastic-coated metal foil that has good tear resistance and should have good tightness, must also be insensitive to impact and pressure and should be very flexible and plastically deformable.

An advantage of the invention is also that the void volume for manufacture the pack requires little storage and transport.

The packing according to the invention is robust and does not require any special Protective or protective packaging; handling is easy. Partially emptied packs can be temporarily stored and reused because of the tight connections (see above) therefore do not have to be destroyed.

Based on the embodiments shown in the drawing, the Invention explained in more detail. They show: FIG. 1 a finished tubular bag pack in the head area with bowl and emptying nozzle in section (on an enlarged scale against Fig. 2 ff.); Fig. 2 shows the tubular bag pack before placing the shell (simplified schematic); 3 shows the pack before the emptying nozzle is attached (simplified); Fig. 4 shows the finished pack in side view; 5 shows the pack after the emptying nozzle has been removed with severed closure end; 6 shows the partially emptied pack in an emptying gun (simplified); and FIG. 7 shows the partially emptied pack in the head of an emptying pistol, detailed in enlarged section.

According to FIG. 1, the pack 16 essentially has a hose jacket 29 made of flexible sheet material with a bottle neck-like end 24 attached thereto Separation point 40, a clip closure 37 and sealed with a sealing compound 43 Interface 38. The pack is still closed, with the interface 40, which protrudes freely from the nipple 23 of the shell 22 with the closure 37, good is recognizable. The connection surface on the cylindrical connection area 30 and 32 of the shell 22 and the casing 29 with the pack free of folds in this area, which only results in a tight and permanent connection, here is a bond, could also be, for example, a weld. One is sufficient for the pack to function Distance between the center of the pack shoulder 50 and the clip fastener 37 is expedient, from this the result is the length of the nipple 23 with the retaining thread and the distance between the separation point 40 to open the nipple 23. At the foot of the nipple 23 is a sealing element 35 for an emptying nozzle 26 is provided in order to ensure a tight connection to the jacket 29.

Furthermore, in FIG. 1 is another exemplary embodiment of the head area of the pack when the lobed emptying end 24 ' only occurs in the nipple opening 23, that is, does not pass through completely. Next to the end 24 'is an opening 40' on the free shoulder of the pack which Opened here with an opening tool in the space between the end 24 'and the nipple 23 must be shown. This opening point can be seen, thus reducing the risk the uncontrolled piercing and severing of the clip 37 'is not given. For the function of this version of the packing there is a sufficient distance between Nipple inner wall and clip fastener 37 'useful to easily reach the opening point 40 'to reach the shoulder of the pack.

F i g. 2 shows the shape of the closed tubular bag 16 with the molded bottle neck-shaped end 24 with the clip closure 37; recognizable is the bottle-shaped neck 24 which is inserted into the bowl 22 and after its introduction protrudes beyond the edge of the nipple 23.

F i g. 3 shows the pack 16 before the emptying nozzle is attached 26, which can be screwed onto the nipple 23, although other connections are also possible how bayonet or snap connections would be possible. The pack 16 can be supplied with the enclosed or screwed-on discharge nozzle 26; in the latter case becomes First use the emptying nozzle 26 removed, the protruding locking clip 37 cut off at the interface 40 and then put the emptying nozzle 26 back on, the pack 16 can then be emptied using a cattail gun.

F i g. 4 shows the finished tubular bag pack 16 with tray 22 and attached emptying nozzle 26.

F i g. 5 shows how already to FIG. 3 mentions the tubular bag pack 16 with the emptying nozzle 26 unscrewed and the closure clips cut off at the separation point 40 37 with the remainder of the pack end 24; after unscrewing the emptying nozzle 26 pack 16 is to be processed.

One in a commercially available spray tube piston gun 31 as an emptying gun Packing 16 used is shown in FIG. 6 and 7, namely in FIG. 6 the entire cattail pistol 31 with a push rod 34 and partially empty packing 16, while in FIG. 7 the head of the pistol with parted pack 16 in section is shown. A piston 33 is inserted into the barrel of the pistol via the push rod 34 31 is moved to the emptying nozzle 26, while the jacket 29 is compressed, and the filling material emerges from the emptying nozzle 26. Visible are in Fig. 7 the tight connection point 30/32 and the free exit from nipple 23 to the emptying nozzle 26th

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Claims (8)

1. tubular bag pack (16) with - a tubular jacket (29) - Made of flexible film material to accommodate preferably pasty filling material such as sealing compound or the like, - each with a central, tight closure - at both ends of the jacket (29) and - a rigid tapered end member (22), which - on for emptying the contents certain, bottleneck-like, folded-up emptying end of the Shell (29) is arranged and - a central opening at its tapered end has near the discharge end of the jacket (29), thereby g e k e n n n z e i c h n e t that - the end member - is a shell (22) which - at its flared end runs into a cylindrical collar (30) - the one with a non-folded Section (32) of the jacket (29) is tightly and firmly attached, and - at its tapered End runs into a cylindrical nipple (23) - which is spaced - radially essentially to the bottle neck-like emptying end (24; 24 ') of the jacket (29) and - axially to the relevant termination (37; 37 ') of the jacket (29), - suitable for Unhindered access of a cutting tool to an opening point (40) of the jacket (29) end (Fig. 1). 2. Pack according to claim 1, - with a closure member - that with the end link (22) is connectable, thereby g e k e n n n z e i c h n e t that - the Closure member - is a tightly connected emptying nozzle (26). 3. Pack according to claim 1 or 2, characterized in that 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) - for inclusion are sized in a conventional cattail pistol (31). 4. Pack according to one of the preceding claims, characterized in that g e k It is noted that - the emptying end (24 ') of the jacket (29) - into the nipple (23) only occurs (not fully penetrated) (Fig. 1). 5. Pack according to claim 4, characterized in that g e k e n n z e i c h n e t, that - the nipple (23) - is spaced apart radially essentially to the emptying end (24 ') of the jacket (29), - suitable for unhindered access of an opening tool to an opening point (40 ') of an exposed jacket (29) shoulder (Fig. 1). 6. Pack according to one of the preceding claims, characterized in that g e k It is noted that - the tight seal at the emptying end of the jacket (29) - Has a seal (43, 43 ') applied under vacuum (Fig. 1). 7. Pack according to one of the preceding claims, characterized in that g e k It is noted that - the shell (22) - for the complete absorption of the emptied compressed shell (29) is sized. 8. Pack according to claim 7, characterized in that g e k e n n z e i c h n e t, that - the shell (22) with the completely absorbed emptied compressed Sheath (29) - its outer diameter is smaller than the inner diameter of a conventional one Cattail pistol is and - to its inside diameter a jam-free clearance owns.