Image forming apparatus having control structure for cleaning th

Details Image forming apparatus having control structure for cleaning th Image forming apparatus having control structure for cleaning th

1996-03-13

1998-03-17

Grimley, Arthur T.

Electrophotography

Control of electrophotography process

Control of transfer

399 71, 399101, 399302, 399388, G03G 1516, G03G 2100

Patent

active

057297886

ABSTRACT:
A transfer sheet detect sensor for detecting the presence or absence of a transfer sheet is disposed between a point of contact where a developing device for developing an electrostatic latent image formed on an image carrier to form a toner image is contacted with a transfer roller in a transfer portion and a point of tucking provided just upstream of the contact point where the transfer sheet is tucked into the image carrier just upstream of the contact point, the transfer roller is disposed such that it can be contacted with and retreated (separated) from the image carrier, and a cleaning roller is provided such that it can be contacted with the transfer roller while the transfer roller is retreated to its separated position, whereby a given cleaning voltage is applied to the transfer roller when the transfer roller is cleaned by the cleaning roller.

REFERENCES:
patent: 3923391 (1975-12-01), Washio et al.
patent: 5101238 (1992-03-01), Creveling et al.
patent: 5233394 (1993-08-01), Fujita et al.
patent: 5253022 (1993-10-01), Takeuchi et al.
patent: 5318631 (1994-06-01), Tsukamoto
patent: 5504565 (1996-04-01), Tomiki et al.
patent: 5530535 (1996-06-01), Matsuoka
patent: 5534984 (1996-07-01), Inoue

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