Simultaneous cleaning of residual toner and toner image formatio

Details Simultaneous cleaning of residual toner and toner image formatio Simultaneous cleaning of residual toner and toner image formatio

1998-05-21

1999-12-07

Royer, William J.

Electrophotography

Control of electrophotography process

Control of transfer

399297, 399298, 399302, G03G 1500, G03G 1516

Patent

active

05999763&

ABSTRACT:
The present invention provides an image forming apparatus which includes a movable image bearing member for bearing a toner image, a movable intermediate transfer member to which the toner image on the image bearing member is electrostatically transferred at a first transfer position, and a charger for charging residual toner remaining on the intermediate transfer member after the toner image on the intermediate transfer member has been electrostatically transferred onto a transfer material at a second transfer position with polarity opposite to charging polarity of the normal toner on the image bearing member. An electric field is formed so that the residual toner charged by the charger from the intermediate transfer member onto the image bearing member and a transfer of a next toner image from the image bearing member onto the intermediate transfer member are simultaneously performed at the first transfer position. Also included is a controller for controlling so that a relative position of a first toner image transferred to a first transfer material from the intermediate transfer member with respect to the intermediate transfer member and a relative position of a second toner image transferred to a second transfer material from the intermediate transfer member with respect to the intermediate transfer member are differentiated.

REFERENCES:
patent: 5600431 (1997-02-01), Takeda et al.
patent: 5732310 (1998-03-01), Hiroshima et al.
patent: 5752130 (1998-05-01), Tanaka et al.
patent: 5809373 (1998-09-01), Yoda et al.

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