Image forming apparatus and image forming method involving...

Details Image forming apparatus and image forming method involving... Image forming apparatus and image forming method involving...

2006-06-27

2006-06-27

Grainger, Quana (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

C399S127000

Reexamination Certificate

active

07068957

ABSTRACT:
Optimization of a density control factor accompanying formation of a patch image is executed every time a predetermined period of time elapses since the end of a preceding image forming operation. Since an image is formed at regular intervals in this manner, it is possible to suppress a density variation which is created as toner carried on a developer roller is left unused for long. This effect further improves when the developer roller is rotated idle prior to formation of a patch image or regularly at predetermined timing.

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