Document feeding apparatus

Details Document feeding apparatus Document feeding apparatus

1988-05-03

1989-12-26

Schacher, Richard A.

Sheet feeding or delivering

Feeding

Separators

271 311, 271132, B65H 308

Patent

active

048893323

ABSTRACT:
A document feeding apparatus feeds a document (18) from the endmost position (22) of a stack of documents (10) into a document path (34) using a vacuum suction head operating through an aperture (36) in a baseplate (16). A vacuum source (38) attracts a document (18) to the suction head (40) during a return stroke (50). No vacuum is applied during a forward stroke (48). The vacuum source (38) comprises a reciprocal air pump (54,108) having a potential energy store (66,90) used to power a rapid vacuum-creating return stroke despite a low-power drive source (44,96) to power the forward stroke. A barrel-pump (54) or bellows device (108) can be used as the reciprocal air pump. The vacuum-creating return stroke can be initiated either by solenoid (78) release or by operation of a cam (98) beyond a first angular position.

REFERENCES:
patent: 1999836 (1935-04-01), Guilbault
patent: 3226108 (1965-12-01), Bishop
patent: 4008889 (1977-02-01), Ayres
patent: 4050692 (1977-09-01), Marass
patent: 4569512 (1986-02-01), Bergerioux

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