Post-applied zipper base with grip strip

Details Post-applied zipper base with grip strip Post-applied zipper base with grip strip

1991-03-04

1992-03-03

Elkins, Gary E.

Flexible bags

With closure

Independent closures for single access opening

383 65, 428 343, 428 43, B65D 6528

Patent

active

050926845

ABSTRACT:
A method and apparatus for producing an improved easy-open container wherein a continuous base layer is integrally extruded with structure for gripping thereon and applied to existing film to seal perforated lines of tearing therein. Interlocking zipper elements are contemporaneously extruded and fused to the continuous base layer. Die clutter is reduced and the method produces a flexible container having desirable sealing, opening and gripping features.

REFERENCES:
patent: 3226787 (1966-01-01), Ausnit
patent: 3780781 (1973-12-01), Uramoto
patent: 3827472 (1974-08-01), Uramoto
patent: 4363345 (1982-12-01), Scheibner
patent: 4589145 (1986-05-01), Van Erden et al.
patent: 4755248 (1988-07-01), Geiger et al.
patent: 5022530 (1991-06-01), Zieke
patent: 5023122 (1991-06-01), Boeckmann et al.

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