Image forming apparatus for forming images with at least two...

Details Image forming apparatus for forming images with at least two... Image forming apparatus for forming images with at least two...

2005-08-15

2008-09-09

Gray, David M. (Department: 2852)

Electrophotography

Control of electrophotography process

Control of transfer

C399S302000, C399S308000

Reexamination Certificate

active

07424233

ABSTRACT:
An image forming apparatus forms a multiple-color image with at least two process speeds. A secondary-transfer-bias applying unit applies a bias to a secondary transfer unit at a non-image-formation time. A secondary-transfer-output detecting unit detects an output value with respect to each of the at least two process speeds. A secondary-transfer-bias control unit determines a secondary transfer bias to be applied to the secondary transfer unit based on the output value detected.

REFERENCES:
patent: 6336025 (2002-01-01), Saeki
patent: 5-11562 (1993-01-01), None
patent: 8-292655 (1996-11-01), None
patent: 2579137 (1996-11-01), None
patent: 08286528 (1996-11-01), None
patent: 2002-116643 (2002-04-01), None
patent: 2002-229344 (2002-08-01), None
English Translation of JP 08-286528.

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