Image forming apparatus and method of controlling same

Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light

Reexamination Certificate

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Details

C347S116000, C347S225000, C347S243000, C347S248000, C359S204200, C359S205100, C359S216100

Reexamination Certificate

active

07471307

ABSTRACT:
An electrophotographic image forming apparatus senses amounts of color misregistration of toner images, which are formed using n-number (where n is a natural number and n=2 holds) of photosensitive bodies, when light beams from a plurality of light sources are made to deflect and scan across the n-number of photosensitive bodies by a single rotating polygonal mirror. The timing of light emission from the light sources is controlled in such a manner that light beams from the light sources will be deflected and scanned by mirror surfaces of the polygonal mirror, from among the plurality of mirror surfaces that form the polygonal mirror, such that the amount of color misregistration of every toner image will be less than (n−1)
pixels.

REFERENCES:
patent: 6308018 (2001-10-01), Yoshida et al.
patent: 6906739 (2005-06-01), Suzuki et al.
patent: 2003/0179428 (2003-09-01), Suzuki et al.
patent: 2004/0174427 (2004-09-01), Iwamoto
patent: 2005/0062836 (2005-03-01), Nakajima
patent: 2005/0093968 (2005-05-01), Iwamoto
patent: 2006/0103716 (2006-05-01), Iwamoto
patent: 10-186250 (1998-07-01), None
patent: 2000-141750 (2000-05-01), None
patent: 2003-322811 (2003-11-01), None

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