Developing device and image forming apparatus

Details Developing device and image forming apparatus Developing device and image forming apparatus

2011-07-05

2011-07-05

Chen, Sophia S (Department: 2852)

Electrophotography

Internal machine environment

Particle or contaminant control

C399S043000, C399S055000, C399S279000

Reexamination Certificate

active

07974549

ABSTRACT:
A developing device includes: a developing roller on the surface of which intersecting inclined grooves are formed by rolling working; and a seal member which comes into contact with the developing roller, wherein ridge portions of a convex portion surrounded by the inclined grooves of the surface of the developing roller are formed such that rotational resistance due to the contact of the seal member on the downstream side of a rotation direction opposite to a rotation direction of the developing roller at the time of development is larger than rotational resistance due to the contact of the seal member on the downstream side of a rotation direction of the developing roller at the time of development, and at the time of refreshing of the seal member, the developing roller is rotated in the opposite direction to a direction at the time of development.

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