Special receptacle or package – For body treatment article or material – Bandage – drape or dressing
Patent
1993-10-21
1995-04-25
Meyers, Steven N.
Special receptacle or package
For body treatment article or material
Bandage, drape or dressing
229 8705, 383211, A61B 1706, B65D 6500
Patent
active
054091152
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention concerns a tubular bag packaging, for bandage-like materials in particular, consisting of a web of foil 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 hermetically 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.
A tubular bag packaging for pressure-sensitive material, for example layers of cheese slices, is known from FR-A-2 190 684. A web of foil 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 web of foil 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 that part of the longitudinal seam projecting beyond the ends of the packaging and intersecting with the transverse seams 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 seam and when this strip is pulled along the line of the 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 customer, as the transverse seams are not opened at the same time and the manipulation required is unnecessarily complicated. This difficulty may still be reasonable and acceptable when it involves the removal of foodstuffs, but an aid to opening of this kind on the packaging of medical Goods such as bandages for staunching the flow of blood etc. is not acceptable. In addition the notch must be constructed in such a manner that it penetrates far enough into the area of intersection of the longitudinal and transverse seams, on the one hand, but, on the other hand it must not be so deep that it endangers the hermetic seal of the foodstuff contents. This requires at least a separate working operation during automatic packaging, thus reducing the speed of packaging.
A tubular bag packaging for material in the form of a bar or cake, such as, for instance, chocolate products, consisting of a foil-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 tab and also joined firmly to one another by means of glueing or welding and which can be opened by pulling the tear-off tab along this seam line, is known from DE-OS 36 18 765. The task to he solved by this invention is that of creating a tubular hag packaging for material in the form of a bar or cake, for example chocolate products, which can be packed at high speed and opened easily along the longitudinal seam without its covering being damaged. It is proposed, as a solution, that on at least one face end of the tear-open tab in the vicinity of at least one transverse seam an opening he constructed which touches the longitudinal seam at least and is open at the side. The opening is an approximately semi-circular notch which has been punched out. A disadvantage of this tubular bag packing is the low stress concentration, 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 the applicability of the proposed aid to opening is restricted and the latter can basically only he used for material in the form of a cake or bar and for packaging which can he torn easily.
Folding packaging is known from DE-OS 39 17 048, made out of a single web of foil and folded and sealed around the materia
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Lohmann GmbH & Co. KG
Meyers Steven N.
Patterson Marie Denise
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