Image forming apparatus

Details Image forming apparatus Image forming apparatus

2006-08-24

2008-08-26

Ngo, Hoang (Department: 2852)

Electrophotography

Image formation

Combined or plural functions by single component

C399S257000

Reexamination Certificate

active

07418223

ABSTRACT:
An image forming apparatus having a plurality of image forming stations each provided with an image bearing member, a developing device for collecting any untransferred toner on the image bearing member and at the same time, developing an electrostatic image with a toner, and a transfer device for transferring the toner image on the image bearing member to a transfer material, wherein when in a first station and a second station downstream thereof with respect to the movement direction of the transfer material, of the plurality of image forming stations, a toner discharging operation of discharging the toner from each developing device is performed during a non-image forming operation, the toner discharging amount in the second station is controlled so as to be greater than the toner discharging amount in the first station.

REFERENCES:
patent: 6314251 (2001-11-01), Gomi et al.
patent: 6952546 (2005-10-01), Yoshikawa
patent: 2006/0029405 (2006-02-01), Tanaka et al.
patent: 2004-21178 (2004-01-01), None
patent: 2004-117960 (2004-04-01), None

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