Image forming apparatus that adjusts operating conditions...

Details Image forming apparatus that adjusts operating conditions... Image forming apparatus that adjusts operating conditions...

2005-08-30

2010-02-16

Gray, David M (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

C399S026000, C399S050000

Reexamination Certificate

active

07664412

ABSTRACT:
An image forming apparatus and an image forming method, which are capable of forming images at stable image quality by executing adjustment of operating conditions at appropriate timings, are provided. When a Vsync count corresponding to an integrated value of a rotation count of an intermediate transfer belt reaches a predetermined value V1or V2, a charging current Iw is increased by one level and an adjusting operation of a developing bias is executed (at a time t4or t5), to thereby stabilize an image density. Further, when remaining service life of a developer reaches a predetermined value (50%) (at a time t6), if the Vsync count at that moment suggests that the time to change the charging current Iw is drawing near, the change thereof is executed ahead of the schedule, whereby the adjusting operation of the developing bias, which should otherwise be executed at the time t7, is omitted.

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