Film and package having strong seals and a modified ply-separati

Details Film and package having strong seals and a modified ply-separati Film and package having strong seals and a modified ply-separati

1984-07-20

1986-10-07

Kittle, John

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428349, 4284761, 428516, 428520, B65D 1100, B32B 2708

Patent

active

046159266

ABSTRACT:
The invention discloses a multiple layer packaging film, packages made therefrom and a method of opening the packages. The invention provides inseparable seal strength and in some cases hermetic seals, in combination with peelable ply separation opening for access to the contents of the package, while at the same time providing excellent barriers to transmission of oxygen and moisture. Certain embodiments provide for improved abuse resistance, excellent graphics, and other improvements. The method of opening the package depends on separating opposing ones of the package sidewalls, forcing the opening tear to be propagated partially through the film to a peelable layer interface, with subsequent ply separation along the interface to effect completion of opening of the package.

REFERENCES:
patent: 3988499 (1976-10-01), Reynolds
patent: 4254169 (1981-03-01), Schroeder
patent: 4284672 (1981-08-01), Stillman
patent: 4289830 (1981-09-01), Knott, II
patent: 4407873 (1983-10-01), Christensen et al.
patent: 4457960 (1984-07-01), Newsome
patent: 4469742 (1984-09-01), Oberle et al.
patent: 4501797 (1985-02-01), Super et al.

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