Image forming apparatus and method of determining...

Details Image forming apparatus and method of determining... Image forming apparatus and method of determining...

2011-05-03

2011-05-03

Gray, David M (Department: 2852)

Electrophotography

Diagnostics

Consumable

C399S029000

Reexamination Certificate

active

07937003

ABSTRACT:
A photosensitive layer of a photosensitive drum is charged and a surface of the photosensitive layer is exposed at a specified density and then a development bias is applied to a development roller. An absolute value of a detection voltage is obtained from a development current sensor. It is determined whether the obtained absolute value of the detection voltage is less than a threshold which is set in advance, whereby a determination is made as to whether the charging property of toner is degraded.

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