Easy-open flexible pouch and apparatus and method for making sam

Flexible bags – Wall details – Specified seam structure

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Details

206484, 53373, 156581, B65D 3000

Patent

active

048080101

ABSTRACT:
A pouch and a method and apparatus for forming an easy open pouch in a vertical form-fill-seal process wherein a pouch is formed from a sheet of thermoplastic film and a heat seal between pouches as they are filled serves as the top closure for the lower pouch and a bottom closure for the upper pouch, the easy open feature being provided by a U-shaped portion having a plurality of seal ribs, and a tear initiation notch.

REFERENCES:
patent: D138697 (1944-09-01), Salfisberg
patent: 2230849 (1941-02-01), Salfisberg
patent: 2329360 (1943-09-01), Salfisberg
patent: 3155282 (1964-11-01), Leblane
patent: 3184121 (1965-05-01), Volckening
patent: 3278085 (1964-06-01), Brown
patent: 3510054 (1970-05-01), Sanni et al.
patent: 4506494 (1985-03-01), Shimoyama et al.
Drawing-American Can Film, Prodo Pak-8/26/87.

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