Image forming device

Details Image forming device Image forming device

2005-12-06

2005-12-06

Ngo, Hoang (Department: 2852)

Electrophotography

Control of electrophotography process

Control of developing

C399S066000, C399S149000, C399S354000

Reexamination Certificate

active

06973275

ABSTRACT:
An image forming device includes an image forming unit that includes a photoconductive drum which carries an electrostatic latent image, a developing roller which forms a developing nip by contacting the photoconductive drum and develops the latent image by using toner, and a transfer roller that forms a transferring nip by contacting the photoconductive drum and transfers a toner image onto a recording paper. A transferring voltage impressing circuit impresses to the transfer roller, a voltage of an opposite polarity to a polarity of a transfer process, for a prescribed period of time during a period when the recording paper is absent in the transferring nip. A developing voltage impressing circuit impresses to the developing roller, a voltage of a same polarity as a developing process and lower than the developing process when a field impressed with the voltage of the opposite polarity by the transferring voltage impressing circuit passes the developing nip.

REFERENCES:
patent: 6400918 (2002-06-01), Ishii et al.
patent: 6801735 (2004-10-01), Komiya et al.
patent: 08-095453 (1996-04-01), None
patent: 10-039705 (1998-02-01), None

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