Web control means and method for bag making machine

Details Web control means and method for bag making machine Web control means and method for bag making machine

1990-01-12

1991-05-14

Spruill, Robert L.

Package making

Methods

Enclosing contents within progressively formed web means

533891, 53551, 226108, 493213, B65B 908, B65B 4116, B31B 184

Patent

active

050144987

ABSTRACT:
An apparatus and method for making and filling bags from plastic film, wrapping an endless supply about a forming and filling tube where the supply has a plastic zipper profile extending intermediate the edges of the film material, controlling the feed of film over a sharp edge of a former so that a tension free slack is maintained in the film to eliminate the possibility of distortion or damage to the small rib and groove interlocking zipper profiles on the film.

REFERENCES:
patent: 2955398 (1960-10-01), Dreeben
patent: 3721376 (1973-03-01), Christian et al.
patent: 3727820 (1973-04-01), Braun
patent: 3743154 (1973-07-01), Brewitz
patent: 3890547 (1975-06-01), Keck
patent: 4343421 (1982-08-01), Assmann et al.
patent: 4790126 (1988-12-01), Boeckmann
patent: 4798353 (1989-01-01), Peugh

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