Package making – Progressively seamed cover web or web folds
Patent
1978-02-09
1979-08-21
Culver, Horace M.
Package making
Progressively seamed cover web or web folds
53329, 53373, 1565831, B65B 902, B65B 5114, B65B 5116, B65B 5126
Patent
active
041648331
ABSTRACT:
A machine for heat sealing articles between two continuous webs of plastic material comprises two parallel synchronously driven shafts, each of which has a pair of wheels on it which are brought into pressure relationship for heat sealing. One shaft is mounted for yielding perpendicularly to its rotational axis and carries a cam follower disc. The follower disc is raised intermittently and the seal wheels are thereby separated, to relieve pressure and omit sealing, with a cam that is on the other shaft and is engaged periodically for rotation by means of a clutch.
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Culver Horace M.
Pratt Manufacturing Corp.
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