Developing device and image forming device and preventing...

Details Developing device and image forming device and preventing... Developing device and image forming device and preventing...

2006-06-29

2009-10-13

Gray, David M (Department: 2852)

Electrophotography

Image formation

Development

Reexamination Certificate

active

07603066

ABSTRACT:
A developing device including a first developing roller and a roller drive mechanism is disclosed. The first developing roller comprises a tubular sleeve, on the surface of which developer is supplied, and a magnetic roller that comprises a drawing magnetic pole for drawing developer and a peel-off magnetic pole for peeling off developer, both of which are arranged on the inner circumference of the sleeve. The drawing magnetic pole is arranged to be adjacent to and upstream of the peel-off magnetic pole in the first rotational direction, in which the magnetic roller rotates during an image forming operation. The roller drive mechanism rotates the magnetic roller in the first rotational direction during the image forming operation, and can rotate the magnetic roller in a second rotational direction that is opposite the first rotational direction.

REFERENCES:
patent: 2005/0260015 (2005-11-01), Ito
patent: 02226272 (1990-09-01), None
patent: 5-346731 (1993-12-01), None
patent: 06083172 (1994-03-01), None
English Translation of JP02226272.

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