Image forming apparatus with selectively movable transfer...

Details Image forming apparatus with selectively movable transfer... Image forming apparatus with selectively movable transfer...

2008-07-15

2008-07-15

Gray, David M (Department: 2852)

Electrophotography

Image formation

Transfer

C399S299000

Reexamination Certificate

active

07400852

ABSTRACT:
Rotation of photosensitive drums21, 22, 23and24is started and a full-color mode by a transfer roller drive unit is set for the exposing by an exposing unit11. When the full-color mode is set, a transfer belt25contacts all the photosensitive drums21, 22, 23and24. Then, after a paper sheet P passes through a secondary transfer roller57, an all-separate mode by the transfer roller drive unit is set, and the rotation of the photosensitive drums21, 22, 23and24is stopped. When the all-separate mode is set, the transfer belt25separates from all the photosensitive drums21, 22, 23and24.

REFERENCES:
patent: 6470166 (2002-10-01), Mizoguchi et al.
patent: 2003-029498 (2003-01-01), None
patent: 2003-122089 (2003-04-01), None
patent: 2004-004398 (2004-01-01), None
patent: WO 2005/036276 (2005-04-01), None

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