Flexible bags – Bag having means to facilitate opening it by severing bag... – Line of weakness delineates substantially the entire tearing...
Patent
1993-10-21
1995-08-29
Foster, Jimmy G.
Flexible bags
Bag having means to facilitate opening it by severing bag...
Line of weakness delineates substantially the entire tearing...
206440, B65D 6528
Patent
active
054454549
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/EP92/00397 filed Feb. 26, 1992.
The invention concerns a tubular bag packaging, for medicinal supply articles such as bandages or rigid dressings, in particular, consisting of a tough film web made up of several layers in a composite structure whose opposite borders are glued or welded together along a longitudinal seam to form a tube enveloping the material to be packed and which is sealed at its ends by means of two parallel transverse seams and which exhibits at least one aid to opening, enabling it to be torn open quickly and completely in order to remove the contents, whereby at least one of the transverse seams exhibits a controllable, Given weakening in the form of an incision, which divides the transverse seam only in one exterior part of its width, whereby a weakening line emanating from the area of this incision and running across the length of the packaging is provided for the tear.
A tubular bag packaging for pressure-sensitive material, for example layers of cheese slices, is known from FR-A-2190 684. A film web made of composite material of polyamide and polyethylene, the latter forming the inner layer and the polyamide the outer layer, serves as packaging material. When the borders of the film web are glued or welded together, a sealing seam running lengthwise is formed, whereas the ends are sealed tightly by means of transverse seams. An incision in the ends of the longitudinal seam in the vicinity of the inner angle of the fin of the seam serves as an aid to opening. The notch extends preferably into the area where the longitudinal and transverse seams intersect. A tear-off strip results at the end of the longitudinal and transverse seam and when this strip is pulled along the line of the longitudinal seam, it serves to open the packaging. Removing the contents of the packaging after the longitudinal seam has been torn off proves to be a disadvantage for the consumer, as the transverse seams are not opened at the same time, and the manipulation required to take out the contents is thus unnecessarily complicated. A line of weakening does not exist, either, in the direction of the intended tear at the base of the fin of the longitudinal seam, which is why only a film web which allows itself to be torn open easily can be used. This may be permissible for foodstuffs, which, as a result of the limited imperishability guarantee involved, only remain in the packaging for a short time, but it is not, however, acceptable as far as medicinal supply articles, such as bandages or rigid dressings, are concerned, which, as the case may be, remain in the packaging for a long time, are transported, stacked, restacked or distributed in it and require as packaging a particularly durable tubular bag packaging which, however, must be capable of being opened easily, quickly and completely the moment it is used.
A tubular bag packaging for material in the form of a bar or cake, such as, for instance, chocolate products, consisting of a sheet-like or paper-like covering possessing two transverse seams, running parallel to one another, formed by glueing or welding, and one longitudinal seam running vertically to these transverse seams, formed by means of face ends protruding as a tear-off strip and also joined firmly to one another by means of glueing or welding, and which can be opened by pulling the tear-off strip along this seam line, is known from DE-OS 36 18 765. In one face end of the tear-off strip in the vicinity of the transverse seam there is an aid to opening in the form of an opening which at least touches the; longitudinal seam and is open at the side. The opening concerned is an approximately semi-circular notch which has been punched out. A disadvantage of this tubular bag packaging is the low notch effect, which means that there is insufficient weakening in the area of intersection of the transverse and longitudinal seams, resulting in an aid to opening which is only of limited use when the packaging is torn open. The outcome is that several limits are set to the a
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Foster Jimmy G.
Lohmann GmbH & Co. KG
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