Image forming apparatus, process cartridge and cleaningless...

Details Image forming apparatus, process cartridge and cleaningless... Image forming apparatus, process cartridge and cleaningless...

2008-01-01

2008-01-01

Royer, William J. (Department: 2852)

Electrophotography

Image formation

Combined or plural functions by single component

C399S270000, C399S277000

Reexamination Certificate

active

07315711

ABSTRACT:
An image forming apparatus of includes a developing device bifunctioning as a cleaning device for collecting toner grains left on a photoconductive drum after the transfer of a toner image from the drum to a paper sheet or similar image transfer medium. In the event of toner collection, a DC voltage is applied that causes the residual toner to move from the drum toward a developing sleeve. A main-pole magnet generates, at a position where the developing sleeve faces the drum, a magnetic field of between 100 mT and 200 mT in a direction normal to the surface of the sleeve.

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