Electrophotography – Image formation – Photoconductive member
Reexamination Certificate
2011-08-09
2011-08-09
Gray, David M (Department: 2852)
Electrophotography
Image formation
Photoconductive member
Reexamination Certificate
active
07995950
ABSTRACT:
An image forming apparatus including an image bearing member having a static friction coefficient of from 0.1 to 0.3, a latent electrostatic image forming device, a developing device, and a cleaning device including a cleaning blade to remove remaining toner, in which the contact pressure of the cleaning blade to the image bearing member ranges from 1.5 to 10 g/cm, and the image bearing member and the cleaning blade satisfy the following relationships (1) and (2):in-line-formulae description="In-line Formulae" end="lead"?0.01 (kg)≦(Toff−T0)/r≦0.15 (kg) Relationship (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?1.2≦(Ton−T0)/(Toff−T0)≦3.8, Relationship (2)in-line-formulae description="In-line Formulae" end="tail"?wherein T0(kgcm) represents the rotation torque of the image bearing member when the cleaning blade is not in contact therewith, Toff, the rotation torque when the cleaning blade contacts the image bearing member and the toner is not thereon, Ton, the rotation torque when the cleaning blade contacts the image bearing member and the toner is thereon for development, and r represents the radius of the image bearing member.
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Do Andrew V
Gray David M
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Ricoh Co. Ltd.
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