Apparatus for sealing a hem in a moving web of film using angula

Details Apparatus for sealing a hem in a moving web of film using angula Apparatus for sealing a hem in a moving web of film using angula

1986-09-08

1988-01-05

Schmidt, Frederick R.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493208, 493225, 493394, 493928, 1565831, 1565834, B31B 2364, B31B 2386

Patent

active

047173734

ABSTRACT:
Apparatus for heat sealing a hem in a moving web of plastic film using a plurality of rollers or wheels mounted on a block at spaced locations for engaging the film along the path of a heat seal to be formed in the hem. The rollers are heated by contact of one of their sides against a heated block. The small force holding the rollers against the heated block is provided by a slight angular orientation of the roller relative to the direction of film travel.

REFERENCES:
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patent: 3058403 (1962-10-01), Kugler
patent: 3406610 (1968-10-01), Golden
patent: 3414032 (1968-12-01), Jortikka
patent: 3759772 (1973-09-01), Andersson
patent: 4140046 (1979-02-01), Marbach
patent: 4202721 (1980-05-01), Roberts

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