Electrophotography – Supplemental electrophotographic process – Exposure or charging
Patent
1997-07-07
1999-08-24
Royer, William
Electrophotography
Supplemental electrophotographic process
Exposure or charging
399315, 399398, G03G 2100
Patent
active
059435305
ABSTRACT:
An image-forming apparatus is disclosed. Unstably charged toner contained in a developer is attached to the surface of an image carrier by a developing sleeve for use in a developer unit. This toner is allowed to pass through the transfer position while keeping from contacting a transfer material. The toner is then uniformly charged by a pre-transfer charger or a separating charger to the same polarity as the developed normal toner. This increases an adhesion force of the toner to the surface of the image carrier, thereby preventing its attachment to a separating claw.
REFERENCES:
patent: 4956677 (1990-09-01), Akiyama
patent: 5392108 (1995-02-01), DeWaters et al.
patent: 5526106 (1996-06-01), Katsumi et al.
patent: 5663788 (1997-09-01), Sanpe
Canon Kabushiki Kaisha
Royer William
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