Color image forming apparatus and mono color printing method...

Electrophotography – Control of electrophotography process – Control of cleaning

Reexamination Certificate

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Details

C399S066000, C399S101000

Reexamination Certificate

active

07447455

ABSTRACT:
Disclosed are a color image forming apparatus for mono color printing and a method thereof. The apparatus includes photoconductors, a charger, a development unit for forming a developer image on each of the photoconductors, a transfer unit including an image transfer member for receiving the developer image from each of the photoconductors and a transfer voltage supply member for supplying a transfer bias voltage to the image transfer member, a first cleaning unit for cleaning the photoconductors, and a control unit for controlling the photoconductors, charger, development unit and transfer unit in a mono color printing mode to form a developer image on an image area of a selected photoconductor, to transfer the formed developer image to a non-image area of the image transfer member, and to divide the transferred developer image into portions and reverse-transfer the divided portions from the image transfer member to remaining photoconductors.

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patent: 5107285 (1992-04-01), Hamada et al.
patent: 5732310 (1998-03-01), Hiroshima et al.
patent: 5797063 (1998-08-01), Umezawa et al.
patent: 5828926 (1998-10-01), Iwata et al.
patent: 6032006 (2000-02-01), Yanagida
patent: 7263313 (2007-08-01), Kim et al.
patent: 09-101666 (1997-04-01), None
patent: 10-161426 (1998-06-01), None
patent: 2003-076103 (2003-03-01), None
patent: 2003-280318 (2003-10-01), None
patent: 1020010102829 (2001-11-01), None
Machine translation of JP 2003-076103 A dated Mar. 13, 2008.

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