Special receptacle or package – For folded sheetlike article
Patent
1993-11-30
1995-06-27
Gehman, Bryon P.
Special receptacle or package
For folded sheetlike article
383 8, 383 10, 383 66, 383203, 383207, B65D 6528, B65D 3306
Patent
active
054272459
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an opening device for a bag made from flexible material for packaging compressible products, for example hygiene products such as nappy-pants, the said bag being formed from a flexible wrapping which surrounds the products and keeps them compressed, and having a substantially parallelepipedal shape after having been filled, comprising two front walls, two side walls, one bottom wall and one top wall, and an attached handle fixed by a weld zone to the periphery of the upper part of the wrapping.
The opening device in a bag of this type, known from European Patent Application EPA-349050, is defined by the perforation lines made in one wall of the bag which is perpendicular to the direction of compression of the compressed products, in other words in a side wall. In order to prevent the compressed products from escaping from the bag when it is opened, it is provided for the opening defined by the perforation lines to have a width which is less than the width of the products, and preferably a width which increases towards the bottom.
Moreover, European Patent Application EP-A-391460 discloses a packaging bag of the same type, provided with an opening device comprising a continuous line of weakness arranged partly in one of the walls under tension from the pile of compressed products (in particular the side wall), and partly in an unstressed adjacent wall (the top wall), terminating in a pull-off tongue, so as to define a detachable opening zone covering up to 75% of the surface of the articles.
In use, however, it turns out that these packagings are not really satisfactory, in particular in the case where the products contained in the packaging are highly compressed, for example from 30 to 50% by volume as is desirable in the case of hygiene articles such as nappy-pants in order to reduce the storage and transport volume and to save on the raw materials for the packaging. Indeed, when the first products are removed, the side wall is opened or torn almost completely, which results, on the one hand, in the undesired issuing forth of products, and, on the other hand, in its being impossible to close the opening of the bag in order to protect the remaining products from contamination, in particular by dust, which is important for hygiene products.
Furthermore, the presence on packaging bags of this type of an attached handle, made from a flexible material other than that of the bag and, in particular, with a greater tear resistance, and fixed by welding to the periphery of the top wall of the bag, forms a reinforced band in this zone of the bag, which makes it more difficult to open part of the bag by pulling on precut lines passing through this zone.
The object of the present invention is to provide an opening device for a bag for packaging compressible products, enabling the packaged products to be removed easily one by one from the packaging, even when they are highly compressed, without there being any risk of the products escaping inadvertently, whilst at the same time ensuring hygienic packaging conditions for the products which are not used immediately.
Another object of the invention is to provide an opening device which enables the increased tear resistance of the wrapping of the bag to be overcome easily in the band zone of the attached handle.
The opening device according to the invention consists of a line of weakness forming a discontinuous contour, comprising two first vertical precut lines made respectively in the upper part of each of the front walls and being extended substantially in a straight line by two second precut lines made both in the upper edge of each of the front walls and in the flexible material forming the attached handle fixed to the wrapping by welding, including in the said weld zone, the said second precut lines being connected together by a third horizontal precut line made in the top wall.
According to the invention, the precut lines consist of perforations made in the flexible materials forming the wrapping of the bag and the attached handle.
REFERENCES:
patent: 4867575 (1989-09-01), Wood
patent: 4934535 (1990-06-01), Muckenfuhs et al.
patent: 4966286 (1990-10-01), Muckenfuhs et al.
patent: 4982845 (1991-01-01), Prascak et al.
patent: 5048687 (1991-09-01), Suzuki et al.
patent: 5054619 (1991-10-01), Muckenfuhs
Gehman Bryon P.
Peaudouce
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