Flexible bags – Plural
Patent
1995-11-03
1998-03-31
Garbe, Stephen P.
Flexible bags
Plural
532847, 53469, 53479, 383 94, B65D 3314
Patent
active
057330450
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a web comprising mutually subsequently disposed package blanks (pockets) and a method of filling the pockets of the web.
BACKGROUND AND PRIOR ART
There is a need in the art for a web comprising mutually subsequently disposed pockets in which the web is disposed to be moved along mechanical retainer devices which, in such instance, hold the pockets in the open position in order to make it possible to supply contents to the pockets. Once the contents have been supplied, the pockets are to be closed.
EP-B1-0 054 564 describes a web of the above type. The web displays two opposing walls and longitudinal first and second edges. The web includes mutually subsequently disposed pockets with a bottom portion at the first edge and two connection zones which are directed transversely in relation to the longitudinal direction of the web and which form side closures of the pockets. Transverse slots are provided between the connection zones in two mutually adjacent pockets in order to separate the pockets from one another.
The web includes two substantially opposing strip portions which extend in the longitudinal direction of the web at its above-disclosed second edge. Each strip portion is provided with a continuous retainer device for cooperation with mechanical guide members for keeping the strip portions in spaced apart relationship from one another and thereby for holding the pockets in opened positions in connection with contents being fed into the pockets. In both walls, the web is provided with slots disposed in the longitudinal direction of the web, each one of which being located on either side of the above-mentioned transverse slots, whereby two slots disposed adjacent one another in the longitudinal direction of the web are located in spaced apart relationship from one another.
Once the contents have been supplied to the pockets, these are closed in a region below the slots disposed in the longitudinal direction of the web, whereafter the material between the closure and the second edge of the web is removed from the web. This results in an undesirably large quantity of the material of the web being removed from the web once the pockets have been supplied with their contents. This removed material merely constitutes material waste.
SUMMARY OF THE INVENTION
The present invention provides a web and a method of filling the web, in which the above-outlined material wastage is eliminated. This is achieved by folding the strip portion over and around the retainer devices into facing relation with the outer surfaces of the walls of the web to cover the longitudinal slots, and welding the strip portions to the walls.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will now be described in greater detail hereinbelow, with particular reference to the Drawings, in which:
FIGS. 1a,b are perspective views of embodiments of one portion of a web according to the present invention;
FIGS. 2a,b are sections taken along the line II--II in FIG. 1 in alternative embodiments of the web;
FIG. 3 is a schematic top plan view of a filling station;
FIG. 4 is a top plan view of one embodiment of a folding and sealing station in the apparatus; and
FIGS. 4a-f are the sections A-F in FIG. 4.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
FIGS. 1a,b and 2a,b show one embodiment of a continuous web 20 of flexible material, as a rule plastic material or similar material. The term "similar material" is taken to signify any optional material possessing such properties that a web of the material is suitable for use in the practical application of the invention described herein. The web displays two opposing walls 21a,b and longitudinal first and second edges 22 and 23, respectively, and includes a number of mutually subsequently disposed package blanks or pocket 26. The pockets each have a bottom portion at the above-mentioned first edge 22 and two connection zones or joints 25 which are transversely directed in relation to the longitudinal direction of the web and are
REFERENCES:
patent: 3813845 (1974-06-01), Weikert
patent: 4514962 (1985-05-01), Ausnit
patent: 4558556 (1985-12-01), Jostler
patent: 4630311 (1986-12-01), Bentson
patent: 4654878 (1987-03-01), Lems
patent: 4665552 (1987-05-01), Lems et al.
patent: 4832505 (1989-05-01), Ausnit et al.
Broden Ingemar
Jostler Jan
Garbe Stephen P.
Joker System Aktiebolag
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