Offset sealing method for plastic films

Details Offset sealing method for plastic films Offset sealing method for plastic films

1998-08-10

1999-03-02

Moon, Daniel B.

Package making

Methods

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

493213, 493214, B65B 6118

Patent

active

058756116

ABSTRACT:
A reclosable package includes two sheets of a first polymeric resin material facing one another and forming a package opening having an inside and an outside. A first zipper strip having a male zipper profile and a first flange area, and a second zipper strip having a female zipper profile and a second flange area, are extruded from a second polymeric resin material. The first flange area is sealed to the first sheet with a first seal on the outside of the package opening, and the second flange area is sealed to the second sheet with a second seal on the outside of the package opening. The first and second seals are offset from one another relative to the male and female zipper profiles, so that the first and second seals are not in a back-to-back relationship with respect to one another.

REFERENCES:
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patent: 3839128 (1974-10-01), Arai
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patent: 4894975 (1990-01-01), Ausnit
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patent: 5211482 (1993-05-01), Tilman
patent: 5425216 (1995-06-01), Ausnit
patent: 5558613 (1996-09-01), Tilman et al.

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