DE2364117A1 - METHOD OF MANUFACTURING A SEAL PACKAGING WITH A CYLINDRICAL OR POINTED SECTION AND PACKAGING ACHIEVED BY THIS METHOD - Google Patents

Description

PATENTANWÄLTE OIPl-ING. A. WEDDE OIPL-INQ. K. EMPL

Banks: Deutsche Bank No. 63/22 COI Bayer. Mortgage bank number 172/28OO2 Munich postal check account number 47 392

8 MUNICH 8O Sohumannstr. 2 —Tel .: (Ο811) 471S 47 telegrams · Patentwedde- Munich

Dec. 21 f973

File: P 7680

Societe Anonyme LINCRUSIA

Paris, France

Method for producing a tight package niit cylindrical or polygonal cross-section and packaging obtained with this method.

In principle, tight packaging can be made by winding strips of cardboard or the like in a spiral shape Material to be made. It is enough inside the packaging has a protective or barrier layer, for example made of aluminum or plastic or a Alirniniuu-plastic combination to be provided, this

409832/0692

Layer also created by spiral Yickeln , and their turns partially overlap.

Nevertheless, the liquid contained in the packaging can find its way between the turns of the protective layer. Zcrrmen these turns are covered by an auxiliary strip with glue or hot glue of impermeable Zlaterial to avoid this defect.

In the French additional patent 85 · 592 it was also proposed _? to create a protective layer with the help of a plastic-coated paper strip, one edge of which is folded inwards. But the protective layer was on the outside and the purpose of the string was to prevent moisture from entering the inside of the paper of the protective layer over its edge. In the case of an inner protective layer, the folding was made outwards in order to prevent the penetration of the liquid contained in the packaging through the edge of the paper into the protective layer, = in addition, the plastic-coated side of the strip was turned inwards; it was therefore printed on the mandrel when the packaging was manufactured; this prevented the securing of the pleat from being secured with the aid of a heating mandrel, and an extrusion-applied one was used

- 3 409832/0692

BATH

VerKiegelungsschic-it required. But this process is not reliable, except for some reason the supply -ait VsrsiegelungsMcitericJ. suspends, '\,'? rden the ', / indungen not more closely defined and the packaging is not: very tight; in addition, certain conditioned products can destroy the sealing material and therefore begin to escape after a certain period of time.

To this day there is actually Iceine through spiral wrapping achieved packaging that is completely is tight and could be used for storage and transport of liquids and products that are under Application of an inert gas can be packed.

The invention is based on the object of a manufacturing method to create by spiral winding, by that such packaging can be obtained.

The inventive method for producing a package, in which a dense, inner protective or barrier layer is provided, which is covered by a spiral Winding a strip with overlapping turns is created, one of the side of the Strip is coated with a thermoplastic material, and in which one of the edges of this strip is folded, such that the folded edge of a

409832/0692

BAD OHfGiNAL

Winding on the unfolded edge of the previous .winding comes to the plant is characterized by the fact that the Strip formed as a strip of impermeable material is that the strip is arranged so that its thermoplastic coated side is the outside is that the fold is carried out inwards, and that the "two bands with the help of a heating mandrel through Hot glue can be set.

When winding, the hot-glue surface of the folding flap becomes one turn on the hot-glue surface of the adjacent turn applied and sticks there when heated. In this way, the two windings are reliably fixed achieved without the use of an auxiliary substance is necessary, the failure of which would result in a sealing error.

In an advantageous embodiment of the invention is a second protective or barrier layer is provided, which is formed by helically winding a strip of impermeable Fabric with a lower heat-adhesive side formed on top of the first layer. When winding comes this heat-adhesive side is in contact with the heat-adhesive side of the first layer and adheres to it there whole surface.

409832/0692

A further subject of the invention is a package obtained by the method described above ruit an inner protective or barrier layer, which through spiral winding of a strip is formed, which on one of its sides with thermoplastic Fabric is coated, and on which one of its edges is provided with a folding flap, this packaging characterized in that the strip on its outwardly facing coated side is made of impermeable Fabric is made with its flap facing inward and on the unfolded edge of the first layer is hot glued.

A non-limiting embodiment is shown in the drawing and is described in more detail below. Bs show:

Pig. Figure 1 is a large-scale view of part of the package;

Figures 2 and 3 are sections through part of the strip used to create the protective or barrier layers

4 shows the design of a package for the Pig. 1.

In Pig. 1 embodiment shown, the packaging body has a certain number of rail

- 6 409832/0692

- 6 - 23S4117

th 2, 3 and 4, which are formed by spirally winding a strip of cardboard or similar material on its inner surface, it has two thin spiral winding of a strip of 5 or 6 layers, while 11 denotes the inside of the ¥ ejcpaeimig is.

The strip 5 is designed as an aluminum foil 1 , which is coated on one of its sides with a hot-melt adhesive, for example polyethylene (Fig. 2); the strip 6 has a similar structure, but it would be coated on its other side with a Gleitlaek 9, which can withstand a temperature of about 140 ° (see Fig. 3).

As can be seen from FIG. 4, "the strip 6 is, in a known manner, wound onto the mandrel 10 in a spiral shape, so that a tube is formed which advances in the direction of the arrow F; its painted side 9 is toward the . B © in turned, while its side covered with polyethylene is turned outwards, that is to say to the side opposite the dome The strip is determined in such a way that the folding flap 6a rests against the unfolded band Gb of the preceding, already wound turn

'■ "' .. - 7.- 409832/0692

is made either by heating the mandrel or with the help of a heat exchanger, not shown, so that the hot glue of the folding flap 6a on the edge 6Jd of the neighboring Winding is ensured.

The strip 5 is wound onto the layer formed by the strip 6 by coating it with polyethylene Side inwards, i.e. towards the mandrel. This side is therefore in contact with the coated one Side of the strip 6 and adheres to her as a result of the heating with its entire surface. Preferably the winding is done in such a way that the two strips 5 and 6 are almost completely placed on top of each other, which are being wound up on the mandrel, as in Pig. 4 is shown.

The strips 4 »3 and 2 are applied in the usual way the layer formed by the strip 5 is wound up.

Of course, the invention is not limited to the embodiment described and illustrated, but also all variants, where the body takes place a circular one could also have a polygonal cross-section.

£ 09832/0692

Claims (6)

PATENTANWÄLTE OIPL.-INQ. A. WEDDE DIPL-INQ. K. EMPL 23o4 Π / Banks: DeuteoheBank Nr.eB / 22eoi «8 M Ü N O H E N 8 Banks: DeuteoheBan Bayer. Mortgage bank number 172/28002 G Schümanns *. 2-Tel .: Postal checking account Munich No. 47 382 Tele _O r * mme, Patentwedde-Munich File: P 768Ο Claims . J Process for the production of a package, at v / elcher a dense, inner protective or barrier layer is provided, which is formed by a spiral winding of a Strip with overlapping connections is created, wherein one of the side of the strip is coated with a thermoplastic material, and in which the one of the edges of this strip is folded in such a way that the folded edge of a Y / indung on the unfolded Edge of the previous turn comes to rest, characterized in that the strip formed as a strip of impermeable material is that the strip is arranged so that its thermoplastic coated side is the outside is that the fold is carried out inwards, and 409832/0692 Information on the telephone is non-binding, - Yes - that the two. Edges through with the help of a heating mandrel Hot glue can be set. 2.) Method according to claim 1, characterized in that that a second protective or barrier layer is provided, which by spiral winding a second strip of impervious material is provided on the first layer, the second strip has a heat-adhesive inside, which is used to define the second layer on the first is heated. 3.) Method according to claim 2, characterized by dadur.ch that the two strips are placed one on top of the other and are being wound up to form the barriers will. 4 ·) Method according to one of claims 1 to 3, characterized marked that the inside of the Strip is coated with anti-friction varnish. 5.) Tight packaging with an inner protective or barrier layer, which is made by spirally winding one on one of its sides with a thermoplastic material coated and on one of its edges: with a folding cloth provided strip is formed, thereby - III - 409832/0692 -ss- denotes that the strip at cjeiner outwardly turned, coated side consists of impermeable I laterial, with its folding flap according to is directed inwards and is hot-glued onto the unfolded edge of the first layer. 6.) Packaging according to claim 5, characterized by a second protective or barrier layer, which is made by spiraling a strip of impermeable Material is formed on the first layer, with the lower side of the strip on the first layer is hot glued. 409832/0692 Blank page