Developing roller and imaging apparatus using the same

Details Developing roller and imaging apparatus using the same Developing roller and imaging apparatus using the same

2011-03-15

2011-03-15

Beatty, Robert (Department: 2852)

Electrophotography

Image formation

Development

Reexamination Certificate

active

07907878

ABSTRACT:
A developing roller includes an ultraviolet-curing type resin layer and using a carbon-based electrically conducting agent for giving an electrical conductivity to the resin layer, as well as an imaging apparatus using the same. The developing roller1includes a shaft member2of a metal pipe and a resin layer4. The resin layer4is a resin having fine particles dispersed therein, wherein the ratio a/b of average particle size of fine particles a to total thickness of resin layers b is greater than 2.0 and less than or equal to 5.0.

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