Color electrophotographic image forming apparatus including...

Electrophotography – Image formation – Development

Reexamination Certificate

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Reexamination Certificate

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07933538

ABSTRACT:
A color electrophotographic image forming apparatus includes a rotary to support and move developing devices to a development position without an independent driving motor for rotating the rotary. A number V of developing devices supported by the rotary are sequentially moved to and stopped at the development position in which the developing device faces a photosensitive drum. A drive transmission mechanism is provided in which each time one of a number M of claw portions of a trigger cam is disengaged from and engaged with a solenoid, the trigger cam makes a 1/M revolution, and once every 1/M revolution of the trigger cam, a driving force is transmitted to a rotary gear from a rotary drive gear which is rotated integrally with the trigger cam so that the rotary is stopped after being rotated by an angle W which is an aliquot part of (360°/N).

REFERENCES:
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patent: 2003/0016965 (2003-01-01), Matsumoto
patent: 2004/0061278 (2004-04-01), Nakano
patent: 2005/0191091 (2005-09-01), Isobe et al.
patent: 2007/0092297 (2007-04-01), Shimura et al.
patent: 2007/0177901 (2007-08-01), Kawashima
patent: 2007/0212112 (2007-09-01), Kadota et al.
patent: 2004-145272 (2004-05-01), None
patent: 2005-227719 (2005-08-01), None
patent: 2007-199585 (2007-08-01), None
Notification of the First Office Action dated Aug. 7, 2009 in Chinese Application No. 200810099241.0, and an English-language translation therefor.
Japanese Office Action dated Nov. 11, 2008 in Japanese Application No. 2008-112000, and an English-language translation thereof.

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