Envelopes – wrappers – and paperboard boxes – Wrapper – Including means to facilitate severing the wrapper
Patent
1991-11-08
1994-10-18
Shoap, Allan N.
Envelopes, wrappers, and paperboard boxes
Wrapper
Including means to facilitate severing the wrapper
229925, 229926, 383107, 383200, 383211, B65D 6532
Patent
active
053560680
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a foil-like material for a folding pack and to a corresponding folding pack, in which the foil-like material is so folded round an article to be packaged and is so closed that the article is surrounded by it on all sides in an airtight manner. The foil-like material or the folding pack comprises a single foil sheet, of which the mutually opposite edge regions laterally framing the inner region of the foil sheet are each equipped with an adhesive layer.
Correspondingly produced folding packs serve for the packaging of, for example, freeze-dried coffee, biscuits, so-called sweet bars or other foodstuffs which are to be packaged in an airtight and moisture-proof or aroma-tight manner.
PRIOR ART
It is known to bring a single-ply, one-piece foil sheet together round the article to be packaged, in such a way that the foil sheet can be folded round the packaged article about bending edges extending in the direction of transport, the free seam edges subsequently being sealed to one another by means of a longitudinal seam. The sealed-together longitudinal-seam regions form a so-called longitudinal-seam fin which is subsequently swung round over its entire surface onto the outer face of the pack, so that it does not project disruptively from the pack. The two end faces of the pack are also sealed together in a similar way, so that the packaged article is thereafter closed on all sides by the foil sheet in an airtight, moisture-proof and aroma-tight manner.
The foil sheet itself consists, as a rule, of a composite material or of aluminium.
These known folding packs are satisfactory from a technical point of view. A disadvantage, however, is that they can be opened only with difficulty and that, without the aid of a cutting tool or without destroying the packaged article, opening is possible only with very great difficulty.
SUMMARY OF THE INVENTION
The object on which the invention is based is, whilst avoiding these disadvantages known from the state of the art, to provide a folding pack and the material used for this which make it possible to open folding packs of this type in an economically simple way, even without the aid of cutting tools, without difficulty and in a manner which takes good care of the packaged article.
The above object is achieved according to the present invention by providing a folding pack including a foil-like material, wherein the foil-like material is so folded around an article to be packaged and is so closed such that the article is surrounded by it on all sides in an airtight manner.
The folding pack according to the invention accordingly consists of a single foil sheet. The mutually opposite edge regions of this foil sheet which laterally frame the inner region of the latter are each equipped with an adhesive layer. The inner region itself, directly wrapping the article to be packaged, is not equipped with an adhesive layer. This foil sheet according to the invention is characterized in that the two mutually opposite edge regions each have at least one not permanently adhesive region, these regions of the two edge regions being located one above the other in the state folded together to form a folding pack. Furthermore, along the peripheral line of one of these two edge regions, the foil sheet is partially separated materially from the remaining edge region, the adhesive layers being present between these two not permanently adhesive regions and the respective adjacent inner region, so that the inner region is completely framed laterally by the adhesive layers. As in the state of the art, the article to be packaged is therefore framed on all sides by an adhesive layer, thus making it possible to obtain a sealed pack. Because one of the two edge regions located one above the other is materially separated and because these two regions are formed so as not to adhere to one another, it is possible to design the edge region with a tab located on one side, so that the folding pack can be opened very easily by pulling on this tab. This eas
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patent: 5129518 (1992-07-01), Tanaka et al.
patent: 5184771 (1993-02-01), Jud et al.
Pascua Jes F.
Shoap Allan N.
Syspack, S.A.
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