Flexible bags – Tamper indicating
Patent
1996-07-15
1997-10-14
Pascula, Jes F.
Flexible bags
Tamper indicating
229 71, 229 72, 229 80, B65D 3334, B65D 2704
Patent
active
056764669
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a multiple-use shipping bag as known from German utility model 90 16 450.4.
From this prior art document as well as from other references the problem to prevent waste is known; in particular envelopes or similar shipping containers should be designed as recyclable products and, for this reason, should be manufactured out of durable plastics material.
However, such a conventional multiple-use shipping bag, besides the material used, still mainly focuses on classical envelopes (like the ones made from paper or cardboard) such that a closing by the user and thereby a handling of the devices is troublesome and unsatisfying: Such a prior art shipping bag in particular, like the classical envelope, provides for the closure flap at the back side to be glued to the envelope by (multiple-use) glue or adhesive tape. Thereafter, a conventional stamp has to be applied to the front side, which, when the shipping bag is to be re-used, will have to be drawn off with effort.
Finally, production of such a shipping bag is difficult and cumbersome, since strong and comparatively thick plastics material must be cut, folded in shape and permanently sealed along the seams like a conventional envelope. In addition, there is the manufacturing challenge to provide an address window on the front side of the prior art shipping container.
A further recyclable shipping container is known from German utility model 91 08 653.1, which has been designed with at least one of the walls entirely made of transparent plastics material. By that means, an addressing of letters would be facilitated, however, for general use in postal services such a shipping container is not ideal since the contents of the shipping container, beyond the address, would be visible from the outside.
Finally, from German patent application DE 37 44 621 A1, not only a multiple-use shipping bag made of plastic foil with a transparent front side is known, in addition, the front side has a cut-out section in the area where the stamps or stamp imprints are to be placed, allowing access to the paper inside (which is to be provided with the franking directly). In this case, not only is confidential information potentially visible from the outside, also the partial opening of the container in the area of franking is a feature which could, particularly in a humid environment, impair the goods to be dispatched, and for this reason, this prior art container would not be suitable for universal use.
Thus, it is the principle object of the present invention to provide a multiple-use shipping bag which permits an easier handling as well as simplified production, and which, in addition, may be used for mailings without the content of the bag (with the exception of the address) visible from the outside.
This object is achieved by the multiple-use shipping bag having the features of patent claim 1.
The multiple-use shipping bag according to the invention provides for a compartment for goods to be mailed between the transparent layer and the back wall, and on the front side, the shipping bag can be closed simply by inserting or introducing the closure flap into the pocket formed between the transparent layer and the front wall, without further adhesive tapes or joints necessary.
Also, since the front wall is connected to the transparent layer through the connection in the address window region, the pocket for the closure flap is created in a simple manner, without additional joints necessary which would have caused increased production effort.
For production, it has additionally turned out to be particularly useful not only to provide the transparent layer inside the envelope for covering the address window in this region, but also to provide it as a full layer extending between the lateral edges of the shipping container. Particularly, the material for the transparent layer is to be chosen with the feature of better and quicker melting than the other plastics material layers of the front wall and the back wall, such that the transparent layer works as
REFERENCES:
patent: 1135064 (1915-04-01), Shipley
patent: 1385248 (1921-07-01), De Vaughn
patent: 1964596 (1934-06-01), Overly
patent: 3150473 (1964-09-01), Lemelson
patent: 3151803 (1964-10-01), Kaminski
patent: 3315878 (1967-04-01), Hiersteiner
patent: 4288028 (1981-09-01), Diaz
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