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US 5,312,189 AGranted
Bag made of foil material and a method of producing such a bag
AssigneeCellpack AG
InventorsRudolf Aeschbach, Martin Wiesmann
Life of this patent
Estimating the term…
Abstract
The bag includes at the area of a corner or a projection a pouring structure which is in part enclosed by a seam. The pouring structure includes a channel and a tube located in the channel in order to prevent a collapsing of the channel and to channel the discharging of the contents of the bag.
Claims4
A generally rectangular collapsible bag made of thin flexible foil material and having a sealed pouring channel at one corner thereof which corner can be severed to permit expelling the contents of the bag comprising:
- two flat flexible side walls interconnected at their edges by a peripheral seam to provide a filling space therebetween,
- a pouring channel structure located at said one corner of the bag comprising:
- a downstream end remote from said filling space and an upstream end near said filling space,
- a preshaped recess formed in said side walls to provide a hollow space having a cylindrical portion terminating in a bulge portion at the upstream end thereof,
- a seam extending across said one corner surrounding the cylindrical portion of said recess joining segments of said peripheral seam adjacent said one corner,
- said bulge ballooning radially from said cylindrical portion and projecting beyond the confines of said corner seam into said filling space,
- a reinforcing tube disposed in said cylindrical portion of said hollow space communicating freely with said bulge portion,
- whereby, when said one corner is severed said preshaped bulge portion of said pouring channel prevents collapse of said flat walls adjacent the upstream end of said tube so that the contents of the bag will flow freely from said filling space into said bulge portion and through said tube.
5 more elements
Dependencies are inferred from the claim text.