Floating adustable gusseting wheel

Details Floating adustable gusseting wheel Floating adustable gusseting wheel

1988-10-21

1990-04-10

Schmidt, Frederick R.

Manufacturing container or tube from paper; or other manufacturi

Bending

Folding

493439, B65H 4522

Patent

active

049156802

ABSTRACT:
Disclosed is an apparatus for introducing a gusset into a web of plastic film. The apparatus includes a pneumatically-biased protruding plate which varies the depth of the gusset to maintain a constant protruding plate-film web tension in response to variations in the transverse width of the film web. Further disclosed is a means for holding the zipper laterally stationary and in alignment while the gusset is introduced into the film web by the same apparatus.

REFERENCES:
patent: Re28959 (1976-09-01), Naito
patent: 2641166 (1952-07-01), Morrell
patent: 3503112 (1967-01-01), Siegel
patent: 3584545 (1971-05-01), Ehlscheid
patent: 3678813 (1972-07-01), Wech
patent: 4094729 (1978-06-01), Boccia
patent: 4417883 (1983-11-01), Granger et al.
patent: 4650455 (1987-03-01), Kondo

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