Transfer apparatus

Details Transfer apparatus Transfer apparatus

1997-01-08

1998-07-07

Grimley, Arthur T.

Electrophotography

Internal machine environment

Particle or contaminant control

399313, G03G 1516

Patent

active

057782814

ABSTRACT:
A transfer apparatus for electrostatically transferring a toner image of a given polarity supported on an image support to a recording medium includes a transfer roll and a cleaning member. The transfer roll comes in rolling contact with the image support in synchronization therewith and has a transfer electric field of an opposite polarity to toner formed in a gap between the transfer roll and the image support. The cleaning member abuts the transfer roll to remove residues on the transfer roll. A charged property of a contact surface portion between the cleaning member and the transfer roll is set so that a charge polarity on a surface of the transfer roll produced as the cleaning member abuts the transfer roll becomes the same as a toner polarity on the image support.

REFERENCES:
patent: 4382673 (1983-05-01), Nakajima et al.
patent: 4588279 (1986-05-01), Fukuchi et al.
patent: 4931839 (1990-06-01), Tompkins et al.
patent: 4998143 (1991-03-01), Kumasaka et al.
patent: 5233394 (1993-08-01), Fujita et al.
patent: 5438398 (1995-08-01), Tanigawa et al.
patent: 5468584 (1995-11-01), Go et al.
patent: 5530532 (1996-06-01), Iino et al.
patent: 5557384 (1996-09-01), Takano et al.
patent: 5579096 (1996-11-01), Saito et al.

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