Conductive roller

Details Conductive roller Conductive roller

2011-04-12

2011-04-12

Bryant, David P (Department: 3726)

Roll or roller

Concentric layered annulus

Specific composition

C492S049000, C492S028000

Reexamination Certificate

active

07922637

ABSTRACT:
The present invention provides a conductive roller which has excellent resilience in response to deformation and exhibits small variation in electrical resistance. The conductive roller has a metallic core, a conductive elastic layer formed on the outer surface of the core to which layer conductivity has been imparted by carbon black, and a surface-treated layer formed through impregnating a surface of the conductive elastic layer with a surface-treatment liquid, wherein the difference ΔHs (Hs1−Hs2) between micro-hardness Hs1of a surface of the conductive roller and micro-hardness Hs2of the conductive elastic layer after removal of the surface-treated layer, the hardness being determined by means of a micro-hardness tester, is 5% or less of the micro-hardness Hs2.

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