Multicolor image forming apparatus and transfer roller reindexin

Details Multicolor image forming apparatus and transfer roller reindexin Multicolor image forming apparatus and transfer roller reindexin

1990-05-07

1991-06-04

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355271, 355277, 355317, 355326, G03G 500, G03G 2100

Patent

active

050218298

ABSTRACT:
A multicolor image forming apparatus which includes an image forming drum which has a gap or though in its periphery used for securing the ends of a photoconductive sheet. A transfer roller engages the drum to receive a series of different color toner images in registration to form a multicolor image. The transfer roller is driven by engagement with the periphery of the drum in a pressure nip between the drum and roller. When the gap in the drum passes through the nip, an independent motor rotates the transfer roller to a home position, thereby reindexing the roller between each series of images.

REFERENCES:
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patent: 4149796 (1979-04-01), Adachi et al.
patent: 4197445 (1980-04-01), Moser
patent: 4341464 (1982-07-01), Vola
patent: 4705386 (1987-11-01), Ogita et al.
patent: 4733269 (1988-03-01), Kasahara et al.
patent: 4739361 (1988-04-01), Roy et al.
patent: 4862214 (1989-08-01), Kasahara et al.
patent: 4872037 (1989-10-01), Kasahara et al.
U.S. 07/488,546, Jamzohel et al., filed Mar. 5, 1990.

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