Roller member, and process for its manufacture

Details Roller member, and process for its manufacture Roller member, and process for its manufacture

2004-08-23

2008-12-09

Omgba, Essama (Department: 3726)

Roll or roller

With specific roller exterior surface structure

Surface projections, indentations, or slits

C492S031000, C492S035000, C492S036000, C492S056000

Reexamination Certificate

active

07462146

ABSTRACT:
In a roller member having at least a mandrel and a conductive elastic layer provided on the peripheral surface of the mandrel, the roller member has a surface roughness Rz jis 94 of from 0.5 μm to 10 μm, and the roller member contains voids in the vicinity of its surface. Substantially all of the voids have an average internal diameter of from 10 μm to 400 μm and an aspect ratio of from 1.3 or more to 10.0 or less, and having an angle of from 0° or more to 45° or less as an acute angle between an axis that takes the maximum internal diameter of each of the voids and a tangent to a concentric circle of the roller member at the center of each of the voids.

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