Electrophotography – Image formation – Treatment of developed image prior to transfer
Patent
1997-07-08
1999-01-05
Grimley, Arthur T.
Electrophotography
Image formation
Treatment of developed image prior to transfer
399 66, G03G 1514
Patent
active
058571353
ABSTRACT:
An image forming apparatus includes a developing device for developing an electrostatic latent image formed in a prescribed region on an image carrier corresponding to an original document with a charged developer to form a developer image on the image carrier, a transfer charger for transferring the developer image onto an image receiving medium from the image carrier, and a pre-transfer charger for applying an electric charge having the same polarity as that of the charged developer to the image carrier before transferring the developer image onto the image receiving medium. The apparatus further includes a controller for controlling the pre-transfer charger so that the electric charge is applied only to a given area extending from a front end of the prescribed region on the image carrier on which the developer image is formed, the given area smaller than the prescribed region.
REFERENCES:
patent: 4482240 (1984-11-01), Kuge et al.
patent: 4825250 (1989-04-01), Miyata et al.
patent: 4937630 (1990-06-01), Yoshikawa et al.
patent: 5155541 (1992-10-01), Loce et al.
patent: 5333037 (1994-07-01), Inoue et al.
Hayashida Masatoshi
Yokoyama Yuichi
Chen Sophia S.
Grimley Arthur T.
Kabushiki Kaisha Toshiba
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