Apparatus and method for making Z-folded zippered film

Details Apparatus and method for making Z-folded zippered film Apparatus and method for making Z-folded zippered film

1990-09-27

1991-09-10

Schmidt, Frederick R.

Manufacturing container or tube from paper; or other manufacturi

Securing

493214, 493390, 156 66, B65H 1800

Patent

active

050470027

ABSTRACT:
A method and apparatus for producing rolls of thermoplastic film stock wherein zipper elements are interlocked for structural support while the web is open, resembling a "Z" in cross-section, and ready for use on container and packaging machines.

REFERENCES:
patent: 3815317 (1974-06-01), Toss
patent: 4341575 (1982-07-01), Herz
patent: 4582549 (1986-04-01), Ferrell
patent: 4625496 (1986-12-01), Ausnit
patent: 4646511 (1987-03-01), Boeckmann et al.
patent: 4666423 (1987-05-01), Herrington
patent: 4704842 (1987-11-01), Boeckmann et al.
patent: 4709398 (1987-11-01), Ausnit
patent: 4905451 (1990-03-01), Jaconelli et al.
patent: 4941307 (1990-07-01), Wojcik
patent: 4994128 (1991-02-01), Toshima

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