Copy sheet registration assembly for electrophotographic copier

Details Copy sheet registration assembly for electrophotographic copier Copy sheet registration assembly for electrophotographic copier

1984-07-06

1986-11-04

Butler, Douglas C.

Sheet feeding or delivering

Feeding

With means to align sheet

271307, B65H 906

Patent

active

046206990

ABSTRACT:
Apparatus for registering a copy sheet prior to feeding the sheet to the image-transfer station of an electrophotographic copier. Opposing pairs of relatively rigid feed rollers are arranged on shafts in alternating relationship with opposing pairs of relatively compliant feed rollers, which are of somewhat larger diameter than the rigid rollers so as to form nips of appreciably greater extent in the direction of feed. Registration gates mounted for rotation on one of the roller shafts through slipping couplings are selectively restrained against rotation with the roller shaft either in a non-blocking position out of the feed path or in a blocking position within the nip area of the compliant rollers but upstream of the nip area of the rigid rollers. A crimper having an anvil rotating with one of the registration gates and a hammer supported by the anvil for pivotal movement into a recess in the anvil deforms a leading edge portion of the copy sheet as it is advanced from the registration rollers to facilitate separation of the sheet from the photoconductor after image transfer by a pickoff element spaced from the photoconductor.

REFERENCES:
patent: 3469834 (1969-09-01), Stange et al.
patent: 3687539 (1972-08-01), Furuichi
patent: 4060230 (1977-11-01), Church et al.
patent: 4326792 (1982-04-01), Landa
patent: 4410262 (1983-10-01), Ariyama et al.
patent: 4417800 (1983-11-01), Hirose et al.
patent: 4434979 (1984-03-01), Kobler et al.

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