Apparatus for forming a hem in a moving web of film

Details Apparatus for forming a hem in a moving web of film Apparatus for forming a hem in a moving web of film

1987-12-14

1989-01-03

Olszewski, Robert P.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493193, 493928, 493248, B31B 190

Patent

active

047954124

ABSTRACT:
In the manufacture of draw tape bags hems are formed in the opposing panels of the moving web of folded thermoplastic film by utilizing tucker bars, that tuck the hem for the draw tape bags, equipped with a series of rubber wheels that pull the film diagonally so that it is tight against the edge of the folding boards.

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patent: 3656415 (1972-04-01), Hook, Jr.
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patent: 3812269 (1974-05-01), Barnes et al.
patent: 4055109 (1977-10-01), Kan
patent: 4202721 (1980-05-01), Roberts
patent: 4717373 (1988-01-01), Catchman et al.

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