Color image forming device having a temperature detector

Details Color image forming device having a temperature detector Color image forming device having a temperature detector

2005-08-03

2008-03-11

Ngo, Hoang (Department: 2852)

Electrophotography

Control of electrophotography process

Having temperature or humidity detection

C399S301000

Reexamination Certificate

active

07343110

ABSTRACT:
A color image forming device can minimize a registration error in a color image. A plurality of image forming units form the color image on a recording material. An image position detector detects a position of each patch pattern of a toner image formed on the recording material. A temperature detector detects a temperature inside the color image forming device. A registration error correction control part performs a first correcting operation and a second correcting operation, the first correcting operation for correcting a registration error of image in accordance with the position detection signal of the image position detector, the second correcting operation for correcting a registration error predicted by referring to a correction table, which includes a correction value previously determined in response to the temperature inside the color image forming device and an offset value, which is changed each time the first correcting operation is performed. The second correcting operation corrects the registration error by a value corresponding to the correction value plus or minus the offset value.

REFERENCES:
patent: 6418295 (2002-07-01), Sato
patent: 7133056 (2006-11-01), Tanaka et al.
patent: 3-293679 (1991-12-01), None
patent: 2000-231233 (2000-08-01), None
patent: 2003-207976 (2003-07-01), None

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