Stretcher for package forming

Details Stretcher for package forming Stretcher for package forming

1988-08-05

1989-09-26

Coan, James F.

Package making

Methods

Enclosing contents within progressively formed web means

53481, 53551, 493206, B65B 920, B65B 6100

Patent

active

048690481

ABSTRACT:
A method and apparatus for forming bags such as in a form, fill and seal machine wherein the bags are formed by drawing film downwardly over a filling tube and cross-sealing the bag tube and applying a lateral stretching force to the bag tube at the location of cross-sealing preventing wrinkles at the location of the seam formed by the cross-sealing with the stretching force applied at the extreme lateral edge of the film preferably by opposed cam surfaces at each of the bag edge which contact each other at a point just outside of the bag edges and progressively walk into the edge of the bag with the point of contact shifting in an outward direction while it progresses inwardly on the bag to apply a stretching force to the film of the bag for smoothing the entire width.

REFERENCES:
patent: 2732988 (1956-01-01), Feinstein
patent: 2751732 (1956-06-01), Woppman
patent: 3826061 (1974-07-01), Hunter
patent: 3849965 (1974-11-01), Dominici
patent: 4077308 (1978-03-01), Scully
patent: 4090344 (1978-05-01), Kelly
patent: 4534159 (1985-08-01), Kelly

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