05259904 is referenced by 79 patents and cites 14 patents.

A plastic bag with a recloseable zipper-type closure is formed with grip strips on its lips to ease the opening of the bags. The grip strips are extruded from a grip strip extruder which is moved relative to a movement of the zipper type profile to produce a regularly repeating pattern. The strips facilitate opening the bag even with wet or oily fingers. A method and apparatus for forming the same is also disclosed.

Title
Oscillating grip strip for recloseable plastic bags and method and apparatus for making the same
Application Number
7/880253
Publication Number
5259904
Application Date
May 8, 1992
Publication Date
November 9, 1993
Inventor
Steven Ausnit
New York
NY, US
Agent
Kane Dalsimer Sullivan Kurucz Levy Eisele and Richard
Assignee
Minigrip
NY, US
IPC
B31B 1/90
B29C 47/18
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