Electrophotography – Image formation – Development
Patent
1997-12-11
1999-12-07
Royer, William
Electrophotography
Image formation
Development
399228, 399235, 399270, 399271, G03G 1506
Patent
active
05999777&
ABSTRACT:
An image forming apparatus includes an image bearing member for bearing an electrostatic latent image; a first developing device for developing the electrostatic latent image on the image bearing member; a second developing device, faced to the image bearing member and having a movable developer carrying member for carrying toner and carrier, for effecting development after a first developed image provided by the first developing device passes through a position where the developer carrying member is faced to the image bearing member; and a preventing device for forming an alternating electric field between the developer carrying member and the image bearing member, while the second developing device is at reset to prevent the carrier of the second developing device from rubbing the first developed image.
REFERENCES:
patent: 4777107 (1988-10-01), Kurematsu et al.
patent: 4791452 (1988-12-01), Kasai et al.
patent: 4844008 (1989-07-01), Sakemi et al.
patent: 5294967 (1994-03-01), Munakata et al.
patent: 5655191 (1997-08-01), Furuya et al.
Hasegawa Kazuhiro
Masuda Koji
Ogata Takao
Sakemi Yuji
Canon Kabushiki Kaisha
Noe William A.
Royer William
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