Method for correcting registration errors by superimposing a...

Details Method for correcting registration errors by superimposing a... Method for correcting registration errors by superimposing a...

2008-09-19

2011-10-11

Gray, David (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

C399S301000

Reexamination Certificate

active

08036552

ABSTRACT:
A color image forming apparatus causes a light emitting unit to emit light to a superimposed pattern in which a black developer (Bk) is superimposed on a color developer (Y, M, C) as a background color, detects diffuse reflected light by a light receiving unit, calculates positional deviation among the colors using the black developer (Bk) as a reference color based on a detection result, and adjusts an image forming condition.

REFERENCES:
patent: 2002/0054200 (2002-05-01), Hayakawa
patent: 2004/0037584 (2004-02-01), Takahashi
patent: 2005/0200689 (2005-09-01), Shinohara et al.
patent: 2007/0110485 (2007-05-01), Katsuhara et al.
patent: 2002-023445 (2002-01-01), None
patent: 2004-102276 (2004-04-01), None
patent: 2007-079605 (2007-03-01), None
patent: 2007-240592 (2007-09-01), None

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