Electrophotography – Image formation – Transfer
Reexamination Certificate
2006-05-25
2008-08-05
Brase, Sandra L (Department: 2852)
Electrophotography
Image formation
Transfer
C399S310000
Reexamination Certificate
active
07409182
ABSTRACT:
In an image forming apparatus, a transfer brush with length of raised bristles on the surface of a metal holder equal to or smaller than 5.8 millimeters is used. Alternatively, a transfer brush with a maximum bristle inclination amount of raised bristles in a brush unit including a plurality of bristles equal to or smaller than 0.53 millimeter or a transfer brush with a maximum bristle inclination return amount of raised bristles in the brush unit equal to or smaller than 0.30 millimeter is used. An amount of biting into a paper conveyor belt in the brush unit is set to a value equal to or smaller than 2.5 millimeters. A paper conveyor belt with hardness of the rear side equal to or lower than 78 Hs is used. Alternatively, a paper conveyor belt with a coefficient of static friction on the rear surface equal to or lower than 0.75 is used.
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Brase Sandra L
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
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