Unidirectional pinch rollers for a cloth spreading machine

Details Unidirectional pinch rollers for a cloth spreading machine Unidirectional pinch rollers for a cloth spreading machine

1991-09-17

1993-03-16

Stodola, Daniel P.

Advancing material of indeterminate length

Shiftable part allowing hand loading

With shiftable roller

226181, 226186, G03B 156, B65H 2002

Patent

active

051937280

ABSTRACT:
An end cutter includes a pair of rollers (64,73) operatively arranged to frictionally engage cloth passing through the nip thereof. One of the rollers is mounted for unidirectional rotation such that the cloth may be pulled forwardly from a roll, but cannot retract when such pulling force is released. The logic includes a pressure comparator and pneumatically-operated safety dump valve (92,94) for sensing whether the cutter (31) has encountered a motion-impeding obstruction on its forward cutting stroke, and automatically releases the force urging the cutter to move forwardly in such event. The cutter is mounted on a rodless cylinder (48).

REFERENCES:
patent: 3743153 (1973-07-01), Moss
patent: 3884407 (1975-05-01), Sugimizu
patent: 3884747 (1975-05-01), Soto
patent: 4029247 (1977-06-01), Sakariason
patent: 4053092 (1977-10-01), Edwards
patent: 4508252 (1985-04-01), Ivary et al.
patent: 4527174 (1985-07-01), Fujiwara et al.
patent: 4690344 (1987-09-01), Yokata

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