Image forming apparatus

Details Image forming apparatus Image forming apparatus

2006-05-09

2006-05-09

Brase, Sandra L. (Department: 2852)

Electrophotography

Control of electrophotography process

Control of developing

C399S027000, C399S258000

Reexamination Certificate

active

07043171

ABSTRACT:
An image forming apparatus includes a developing device for developing an electrostatic image formed on an image bearing member with developer including toner and carrier, a density sensor for detecting a density of the toner, a control unit for controlling the amount of toner to be supplied to the developing device by comparing an output of the density sensor with a target value, a changing unit for changing the target value when the output of the density sensor falls into an error level, and a recovering unit for supplying the toner based on the target value changed by the changing unit to perform a recovery operation.

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patent: 2003/0147661 (2003-08-01), Ogata

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