Electrophotography – Internal machine environment – Particle or contaminant control
Reexamination Certificate
2006-01-27
2008-10-28
Gleitz, Ryan (Department: 2852)
Electrophotography
Internal machine environment
Particle or contaminant control
C399S049000
Reexamination Certificate
active
07444098
ABSTRACT:
There is described an image forming apparatus equipped with a cleaning unit to clean a belt-type transfer member. The cleaning unit includes: a conductive opposing roller that contacts an inner surface of the intermediate transfer member; a first conductive blush member and a second conductive blush member, both of which are pressed against the conductive opposing roller while putting the intermediate transfer member between them; a cleaning-voltage applying power source to apply a cleaning voltage having a polarity opposite to that of the residual toner onto the first conductive blush member; and an opposing-roller potential controlling unit to control an electric potential state of the conductive opposing roller, so that an electric potential difference, between the first conductive blush member and the conductive opposing roller at a time when the secondary transferring unit is deactivated, is larger than that at a time when the primary transferring unit is activated.
REFERENCES:
patent: 7215920 (2007-05-01), Shida
patent: 2004/0057762 (2004-03-01), Thayer
patent: 60170879 (1985-09-01), None
patent: 6-130875 (1994-05-01), None
patent: 6-332342 (1994-12-01), None
patent: 2000-4079 (2000-01-01), None
Hamada, legal representative Akira
Hamada, legal representative Yoshiko
Kimura Takenobu
Sato Yotaro
Cantor & Colburn LLP
Gleitz Ryan
Konica Minolta Business Technologies Inc.
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