DE2116540A1 - Sausage-shaped pack and process for their manufacture - Google Patents

Description

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Patent attorneys Dipl.-Ing. F. Weickmann,

Dipl.-Ing. H.Weickmann, Dipl.-Phys. Dr. K. Fincke Dipl.-Ing. F. A. Weickmann, Dipl ..- Chem. B. Huber

8 MUNICH 86, POST BOX 860 820

MÖHLSTRASSE 22, CALL NUMBER 48 3921/22

<983921/22>

KRAi ¹ TCO CORPORATION, 260 Madison Avenue, New York, NY,

V.StoA.

Sausage-shaped pack and process for their manufacture

The invention relates to a pack with a closure in the form of a welded seam and a method for production such a closure with increased resistance to bursting or tearing.

The invention is described below in connection with the manufacture of a dispenser with a collapsible wall, as described in U.S. Patent 3,477,614 to Norman under the title "Dispenser", issued on 11/11/1969 »is disclosed. But the invention is not intended to be based on such Donors are restricted. This dispenser consists of an approximately tubular pack of approximate sausage shape ("Chub" pack), which has a zippered seam running in the longitudinal direction and both ends of which are clipped together with metal bands. There is a band around the outside of the pack put around, which holds a dispensing nozzle, through the opening of which a knife tip can be inserted to pierce the package wall. By squeezing and squeezing The contents of the pack can then be pressed out of the pack wall through the hole in the wall and the nozzle

Such packs can contain various products

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th, for example, food can be pressed out of the nozzle as a strand with a certain, special shape. Many products may require a considerable "compressive force" to emerge from the pack, "especially when it comes to cold products." Kgs bring the seam to burst or rupture * - nen the wall of the package by a flexible film | formed) made of plastic, however, to tear Such packaging materials tend, which means that continue the pierced in the area of the nozzle hole to a. ". If the nozzle is placed in the vicinity of the longitudinal white seam, such cracks tend to penetrate to the seam and destroy the seal.

The invention is therefore based on the object of an improved To provide a closure for a multilayer package wall and a method for manufacturing the package and the closure to be provided.

. Further objects and advantages of the invention emerge from the the following detailed description of an execution at » game based on the attached drawings. Show it:

Figol is a perspective view of a dispenser and a Pack with the features of the invention;

Fig.2 is a section showing the staggered arrangement of the layers prior to forming into the tube of Figure 1;

FIG. 3 is an enlarged sectional view of that shown in FIG Pack;

4 shows a schematic representation of a production method for the pack shown in Fig. 1

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In the embodiment of the invention shown in the drawings, a pack 11 with a multilayer Wall 13 is shown suitably shaped to receive a mass and running along a lengthwise direction Hem 15 is closed, at which the edges of the wall overlap in such a way that the hem 15 is reinforced Resistance to bursting or tearing is given. Such a reinforcement at the hem 15 is particularly suitable for a pack important to which a dispensing nozzle 17 with the help a tape 19 is attached. The pressure to be applied by hand squeezing in order to get the contents of the pack Pressing out in a specially shaped strand 20 leads to an extraordinary compressive force on the hem 15 The pack 11 shown is in the special case a "sausage" pack which, after the pack wall has been pierced 13 with the aid of an inserted through an opening 21 in the nozzle 17 Sharp knife point donated a strand 20 of cheese spread or other extrudable masses

The method according to the invention for producing a pack with a solid, longitudinal seam 15 has the following Steps on: An inner layer 23 of the flexible sheet material from which the wall 13 of the package is to be formed, is shifted to the side against the outer layer 25 of this material in such a way that elongated edge strips 27 and 29 arise along the longitudinal edges of the layers, as shown in Figo2 becomes clear. The edge strip 27 of the inner layer is namely to the side over the edge 30 of the outer layer 25 in front of and on the other side, an edge strip 29 is formed from the outer layer, which over the edge 32 of the inner layer 23 protrudes to the side. Then the multilayer sheet material is formed into a tube and filled with the desired content. The longitudinal edge 15 of the pack is formed in that

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the edge strip 29 of the outer layer is connected to an underlying edge 31 of the outer layer 25, as can best be seen from FIG. 3, and thus forms a first outer closure. In addition, the edge strip 27 of the inner layer is connected to an overlapped edge 33 of the inner layer 23 and forms a second or inner closure, see Fig. 3. The pack is closed at both ends by attaching metal clips 35 (Fig. 1) that tightly gather the pack wall 13 together. In this way, sausage-like packs are created. As will be explained in more detail, the inner and outer layers each consist of a web of flexible film material 38, for example saran, which has a weldable, heat-adhesive coating 40 which enables the pack to be autogenously welded by the heat emanating from the packaged product, is formed at the location of the dashed line in Figure 3 _e while a third or intermediate seal 41 between the inner layer 23 and outer layer 25 by a high frequency welding device 43rd

Hereinafter, the individual elements of the invention are described in detail "The inner and the outer layer 23 and W 25 each have two layers, namely a layer 38 of Saran and a layer 40 of a heat-adhesive material. Particularly favorable results have been obtained with a saran layer 38 coated with a heat-sealable material 40 sold by the Dow Chemical Company of Midland, Michigan under the trade designation Dow No. PZ 1620.19. The inner and outer layers 23f 25 of the hot-melt adhesive covered saran preferably have a thickness of 0.0254 mm (1 mil) and a width of 146 mm (5.75 inches). Of course, the inner and outer layers can also be made from other film materials and provided with other weldable coatings, for example with Elvax vinyl art «

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fabrics made by B.I. duPont de Nemours Co. of Wilmington, Delaware. “Or the foil materials can also be used consist of a heat-sticking material ", In the embodiment as shown in Pig. 3 is, the outer layer 25 is arranged with its heat-adhesive coating 40 inwardly, so that after closing to a sole oh this cover along the protruding tape strip 29 on the saran layer 38 of the opposite Tape 31 of the outer layer 25 comes to rest. The heat-adhesive coating 40 of the inner layer 23 is turned outwards, so that this coating is on the protruding tape strip 27 after the formation of the tube on the saranso layer 38 rests along the opposite band 33 of the inner layer 23.

The expressions "inner ¹ * and" outer "are meant in relative terms, since additional outer or inner layers can also be present or an intermediate layer, which together form the flexible film for the pack wall 13. In the example shown, the pack wall 13 is for improvement It is equipped with a reinforcing intermediate layer 45 made of a thin polyethylene film to ensure it is resistant to bursting or biting. Ss is attached in such a way that it does not extend into either the first or the second spine, so as not to interfere with the welding of the tape strips 27 and 29, and also not into the third, intermediate spine 41. A thin polyethylene has proven to be suitable. Foil about 0.38 mm (0.015 inch) diameter and about 119 mm (4 "5 inches) wide has been shown"

The schematic representation of Fig. 4 indicates which Way, the wuisbartigen packs 11 made and with

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a flowable product such as cheese spread. The inner layer 23 can consist of a continuous film web be formed, which is unwound from a supply roll 50 and transported to a packaging station 51 o The intermediate layer 45 made of polyethylene can also in the form of a web under the inner layer 23 and unwound from a supply roll 53 "" The outer Layer 25 can also be in the form of a web from a supply roll 55 unwound and guided under the intermediate layer 45

^ - are · The individual layers 23, 25 and 45 are so in the brought the correct position to each other and the intermediate layer 45 is embedded between the other layers. In this embodiment are the heat-adhesive coatings 40 of the inner layer 23 and the outer layer 25 to the intermediate layer 45 aligned towards. The edges of the inner and outer layers are laterally offset from one another so that tape strips 3.2 mm (1/8 inch) wide. In this arrangement the layers are advanced and transported by a former 57 brought into sole shape, the tape strips 27 and 29 of the plies in question overlap in a way that from Fig. 3 so that their inner edges are approximately in lie on the same plane and a small distance from each other have another · Now heated cheese spread 59 is made from a Nozzle 60 filled into the center of the tube formed. The hot cheese suddenly increases the temperature of the heat-sticking coatings 40 on the tape strips, so that these coatings meet with the tapes 31 and 33 of the respective layers connect sealingly. As a result, the polyethylene intermediate layer 45 is also held in place so that it is no longer against each other the inner or outer layer can move · Simultaneously with the formation of these tape fasteners, a high frequency sealer 43 preferably creates at the packaging station 51 also the middle lock 41 "

After the tube is filled with cheese, the mii-

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tallklipps 35 clamped in place, gathering the wall of the pack together and sealing the ends of the pack so well that that when the side wall of the package is squeezed together, the cheese to squeeze out the contents, not leak through the ends of the package · This is how you get one relatively wide hem 15 with three closures or closure zones, which prevent the weld seams from bursting under the pressure exerted on the Paokungswand 13 is durable »

As mentioned earlier, the dispenser becomes common when used for the first time opened by inserting a sharp knife point through the opening 21 in the nozzle 17 and the Paokungswand 13 is pierced. As the mass oozes out through the hole, that which the knife tip has pulled in tends to Hole to expand, though to some extent through the wrapped tape around the nozzle carries, is limited. Especially when the nozzle is attached to the package wall next to the seam 15, this falls Hem is given the task of further tearing in the circumferential direction. to prevent the packing

Advantageously, the seam 15 has only a single layer 25 ₍ the edge 63 (FIG. 3) of which is exposed on the seam 15). In the conventional methods of forming a seam for such packs, the edges of both the inner and outer layers are exposed and the result is a hem with an edge twice as thick as the edge 63 of the illustrated pack. However, a thick hem interferes with the attachment of the tape 19 to the pack wall is provided on its inner surface with a coating of a pressure adhesive and the pack 13 is rolled over this adhesive layer.If the thin, exposed seam edge 63 is only the thickness of a single layer, it is bothersome

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the unrolling of the pack on the tape does not, even if it comes into contact with the adhesive layer first.The thin edge 65 thus favors the unrolling and sticking of the sausage-shaped pack to an adhesive layer of the tape 19i so that the tape 19 is applied smoothly and without creases can be _o

From the foregoing it is apparent that the illustrated pack is provided with a hem 15, one of which is longitudinal inner closure between the overlapping ends of the inner layer, and a longitudinal outer one Closure between the overlapping ends of the outer position and has a longitudinal closure located in the middle between the overlapping inner and outer layer is formed »The inner and the outer Closures give the overlapped middle closure an additional strength ©

The invention is not limited to that shown and described Embodiment limited. Rather, they are within the scope of the invention and taking into account the concept of the invention numerous modifications and design changes possible borrowed.

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Claims (1)

A η β ρ r Ü ο h e 1 · pack in the shape of a sausage with an approximately cylindrical, multi-layer pack wall, which consists of at least one inner layer and one outer layer ", furthermore with means, to gather the layers at the ends of the pack and seal the ends, and with a hem running in the longitudinal direction of the pack, thereby characterized in that the seam (15) has adjacent, longitudinally extending inner and outer ver » Has conclusions, of which the inner lock on the overlapping hands (27 »33) of the inner layer (23) and the outer closure at the overlapping ends Edges (29 »3t) of the outer layer (25) is formedo 2ο pack according to claim 1, characterized in that the inner and outer layer (23 »25) have the same width and against each other in the circumferential direction of the paokung are offset in such a way that protruding edge strips (27 »29) are created, which form the inner or outer closure form. 3 pack according to claim 2, characterized in that between the inner layer (23) and the outer layer (25) an intermediate layer (45) is inserted for reinforcement, which is in the circumferential direction just before the edge strip (27, 29) ended o 4 · Paokung according to one of the preceding claims, characterized characterized in that a further closure (41) is formed between the inner and the outer closure is. 5 «Paokung according to claim 4, characterized in that the inner and outer layer (23i 25) made of saran (3Θ) 109844/1101 - 2716540 - ίο - with a weldable coating (40) and that the inner, outer and intervening fasteners are welds. 6 «Pack according to claim 2 or one of the following claim ©} characterized? that the inner lock between the edge strip (27) and an over · * · lapped tape (33) of the inner layer and the outer ver ** End between, the tape strip (29) ßfid an overlapped. Rsail (31) of the outer lag © formed Process even production of a box-shaped pack. according to one of the claims 6 ₅ "at & ®m an inner® wa.6 ain © outer layer» the je ^ siis © inen weldable © !!. coating; wear j with <3®s tf & ersv8lg @ ii © inancler facing IfSS ⁵ OeBj isus äis "Ssig © a. su © inem Sshlaucli formed and the lifigslaufeaSea box ü @ t lagsa placed on top of each other g - pji fwgöliweiBt become zia .kSnaea ₉ and finally ofelaEeiisrtiga Paekung as. is longitudinally spaced « Wirö verklippt provide characterized .gekennzeichnet _s ,, -for that the welding and the inner layer to Verklippen. outer layer is arranged offset to the side in such a way that on each layer a hand over the adjacent edge of the other lay © protruding hand is created, and that these edge strips are welded to the edges of the other layer to form a first and a second weld before the package ends are clipped " 8, method according to claim 7j, characterized in that between the first and the second weld seam a further weld seam is formed Method according to claim 7 or 8, characterized in that tf - that between the inner and the outer layer before dsifi 109844/1101 Form a tube into a reinforcing liner is arranged such that its edges are spaced from the first and second weld seams. 1098 44/1101