04285376 is referenced by 66 patents and cites 10 patents.

A reclosable bag made from a thin web plastic extrusion has a bag or pouch portion at the top of which an integral return bent gusset provides upwardly projecting multi-ply flanges by which separable resilient zipper-type fastener profiles comprising integral parts of the plastic extrusion are adapted to be pulled apart by pulling the flanges away from one another. The downwardly projecting portion of the gusset initially may provide an unbroken hermetic seal for the bag or pouch. Where preferred the gusset may be of sufficient length relative to the location of the separable resilient fastener to provide an infolded pouring funnel spout after the tip of the spout has been opened and the spout withdrawn or projected from the top opening from the bag. On the other hand, the infolded gusset may serve simply as a hermetic sealing web adapted to be ruptured for discharge of contents from the bag. After opening of the bag, it is adapted to be reclosed by securing the resilient separable fastener profiles together.

Title
Reclosable plastic bag construction made from a one piece extrusion
Application Number
5/813450
Publication Number
4285376
Application Date
July 7, 1977
Publication Date
August 25, 1981
Inventor
Steven Ausnit
New York
NY, US
Agent
Hill Van Santen Steadman Chiara & Simpson
Assignee
Minigrip
NY, US
IPC
B65D 33/02
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