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

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

1989-06-26

1990-03-06

Sipos, John

Package making

Methods

Forming a cover adjunct or application of a cover adjunct to...

53451, 53479, B65B 6118

Patent

active

049054520

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:
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patent: 2230849 (1941-02-01), Salfisberg
patent: 2329360 (1943-09-01), Salfisberg
patent: 3155282 (1964-11-01), Leblanc
patent: 3184121 (1965-05-01), Volckening
patent: 3234069 (1966-02-01), Saas
patent: 3278085 (1966-10-01), Brown
patent: 3510054 (1970-05-01), Sanni et al.
patent: 4147583 (1979-04-01), Deutschlander
patent: 4506494 (1985-03-01), Shimoyama et al.
patent: 4582555 (1986-04-01), Bower
patent: 4682976 (1987-07-01), Martin
patent: 4795271 (1989-01-01), Lane

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