Image forming apparatus

Details Image forming apparatus Image forming apparatus

2011-06-07

2011-06-07

Gray, David M (Department: 2852)

Electrophotography

Control of electrophotography process

Control of developing

C399S027000, C399S252000, C399S285000

Reexamination Certificate

active

07957658

ABSTRACT:
An image forming apparatus include an image bearing member, a developing container receiving a developer, a developer carrying member for carrying and conveying the developer, a developer feed member for supplying the developer to the developer carrying member, a detection device for detecting an amount of developer in the developing container by detecting an electrostatic capacitance between the developer carrying member and the developer feed member, and a control device for changing a rotational speed of the developer feed member into a plurality of speeds corresponding to the plurality of image forming speeds. The control unit controls the rotational speed of the developer feed member prior to the execution of a detection operation of the detection device so as to be faster than the slowest speed of said plurality of speeds.

REFERENCES:
patent: 6501933 (2002-12-01), Ishii
patent: 2001/0050706 (2001-12-01), Ishii
patent: 2007/0110481 (2007-05-01), Yamada et al.
patent: 4-234777 (1992-08-01), None
patent: 6-19296 (1994-01-01), None
patent: 8-114977 (1996-05-01), None
patent: 2001-350339 (2001-12-01), None

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