Multifeed detector

Details Multifeed detector Multifeed detector

1978-06-28

1980-05-20

Schacher, Richard A.

Sheet feeding or delivering

Feeding

Separators

271122, 271125, 271263, B65H 304

Patent

active

042035864

ABSTRACT:
A multifeed detection system is disclosed that includes a drag roll which is in contact with and loaded against a driven feed belt. A slip clutch applies a torque to the drag roll. The drag roll is in synchronism with a constant speed motor that drives the feed belt. A double sheet entering the nip between the drag roll and the feed belt will cause the drag roll to hesitate with the hesitation being detected by a sensor that activates shut-down of the feeding system.

REFERENCES:
patent: 3108801 (1963-10-01), Van Dalen
patent: 3130394 (1964-04-01), Hinz
patent: 3272500 (1966-09-01), Van Dalen
patent: 3754754 (1973-08-01), Peterson
patent: 4060232 (1977-11-01), Gibson

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