Packaging pouch

Abstract

The disclosure aims at improving the strength of a bag for the packing of products such as moist towelettes. For this purpose, the invention provides to add an upper gusset linking the front and back faces of the packing back and to make integral the flap with such upper gusset through an opening provided on the front face of the packing bag. According to one exemplary embodiment, the packing bag having the general shape of an envelope, more particularly including a back face and a front face, the front face being provided with a dispensing opening which can be closed by a flap, the upper edges of the back and front faces being sealed on the internal layer of an upper gusset, said upper gusset, the flap and the front face being integral. Besides, the upper edge of the front face has at least one cut through which at least a part of the internal layer of the upper edge of the flap is sealed on a part of the internal layer of the upper gusset.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a National Stage Entry of International Application No. PCT / FR2008 / 000661, filed on May 13, 2008, which claims priority to French Application 0754972, filed on May 10, 2007, both of which are incorporated by reference herein.TECHNICAL FIELD OF THE INVENTION[0002]The present invention relates to a packing bag intended to contain and dispense products, for example moist towelettes, substantially in the shape of folded sheets stacked inside the packing bag, and also products in the shape of granules or powder. The invention relates to the field of the packing of products in general and more particularly to the packing of impregnated supports.STATE OF THE PRIOR ART[0003]In the state of the art, the European patent No 1 244 589 is known which discloses a bag for packing towelettes having the general shape of an envelope with a dispensing opening covered by an adhesive flap or liable to be stuck back, wherein the dispensing ...

AI Technical Summary

Benefits of technology

[0006]The presence of an upper gusset thus facilitates the operation of sealing the flap on the external surface of the envelope even though the packing bag is full. In addition, this configuration makes it possible to seal the internal layer of the flap with the internal layer of the upper gusset which makes it possible to improve the strength of the assembly thanks to the composition of the complex films. It should be noted that the external layers of the various elements (the upper gusset, the front face, the back face or the flap) forming the packing bag correspond to the faces which form the external envelope of the packing bag. On the contrary, the internal layers of such elements correspond to the face inside the packing bag when the latter is assembled or in the case of flap 8, to the face oriented inwards the bag.

[0009]the part of the internal layer of the upper edge of the flap intended to be sealed is free of any adhesive means;In these alternative solutions, the part of the flap which must be sealed is free of adhesive or the adhesive has been neutralised. By thus welding the internal layers of the multilayer films, the quality of the welding of the flap with the envelope is substantially improved. The flap of the packing bag thus obtained has less risk to be torn.

Problems solved by technology

In this solution, making the flap integral with the front face of the packing bag when the latter is full remains a problem.

As a matter of fact, the packing bag is swollen when it is full.

It is then delicate to seal the flap on the external surface of the envelope or to keep it sealed during the opening and closing cycles.

However, the means for fixing the flap of the envelope on the packing bag is not described in details and does not seem to make it possible to improve the strength of the product.

More particularly, such a flap may be torn.

On the other hand, using multilayer complex films having a heat-sealable internal layer (polyethylene) and a printable external layer (PVC, polypropylene, PET) also makes the operation of sealing the internal layer of the flap on the external surface of the envelope complicated, and gives bad results which can sometimes lead to the tearing of the flap on the constraints applied to this flap are too important.

As a matter of fact, when the packing bags are opened, the pre-cuts are torn and become easily detectable.

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