Image forming apparatus having toner density control

Details Image forming apparatus having toner density control Image forming apparatus having toner density control

2011-01-25

2011-01-25

Beatty, Robert (Department: 2852)

Electrophotography

Control of electrophotography process

Control of developing

Reexamination Certificate

active

07877031

ABSTRACT:
An image forming apparatus capable of setting a criterion individually for respective image forming apparatuses, which is used in determining whether or not a developer is properly supplied to a developing unit, thereby stabilizing a developer toner density. With a shutter member closed, reflection light from a reflection sheet is received by a toner density detection sensor, and an output voltage is stored in a memory. After the shutter member is opened, reflection light from a developing sleeve is received by the sensor, and an output voltage is stored in the memory. If an amount of change in voltage per unit toner density calculated based on the output voltages does not fall within a predetermined range, an operation of a main unit of the image forming apparatus is stopped. If the amount of voltage change falls within the predetermined range, the amount of voltage change is stored in the memory.

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