Product package having reliable openability

Details Product package having reliable openability Product package having reliable openability

1996-03-11

1997-11-25

Sipos, John

Package making

Methods

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

531336, 53553, 53449, 156344, 428 43, B65B 6118

Patent

active

056899351

ABSTRACT:
A plastic packaging material which, when formed as a package having seams, will provide a predictable line of failure along a seam when the package is opened to prevent the package from tearing down the side. The predictable failure path is provided through a lamination process involving specific resins or blends of resins laminated in three (or more) layers in which an extruded inner layer forms a weak inner bond wholly within that inner layer to create the predictable line of failure and in which the process of forming the material does not inhibit processing speed, efficiency, and economics of materials used to provide this reliable openability.

REFERENCES:
patent: 2260064 (1941-10-01), Stokes
patent: 3559800 (1971-02-01), Butler
patent: 3939972 (1976-02-01), Mayworm
patent: 5196247 (1993-03-01), Wu et al.
patent: 5409772 (1995-04-01), Yabusa et al.
patent: 5443877 (1995-08-01), Kramer et al.

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