Image forming apparatus and density correction method

Details Image forming apparatus and density correction method Image forming apparatus and density correction method

2009-02-11

2011-10-11

Porta, David (Department: 2884)

Electrophotography

Control of electrophotography process

Of plural processes

C399S072000, C399S258000

Reexamination Certificate

active

08036554

ABSTRACT:
When a two-component developer stored in a developer tank has been replaced, an image forming apparatus performs (a) a first formation step of forming a reference toner image on a photoreceptor, (b) a detection step of detecting an amount of toner of the reference toner image, and (c) a supply step of supplying a predetermined amount of toner to the developer tank when the amount of toner detected in the detection step is less than a threshold. Moreover, the image forming apparatus repeats the first formation step, the detection step, and the supply step until the amount of toner detected in the detection step becomes not less than the threshold. This makes it possible to provide an image forming apparatus that is stable in image quality even immediately after replacement of developers.

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