Plastic article or earthenware shaping or treating: apparatus – With mechanical means forming or expanding pores
Reexamination Certificate
2007-06-05
2007-06-05
Davis, Robert B. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
With mechanical means forming or expanding pores
C425S113000, C425S129100, C425S326100, C425S468000, C425S575000, C425S577000
Reexamination Certificate
active
10338055
ABSTRACT:
A method of manufacturing a charge roller utilizes a foam rubber substance where epichlorohydrin oxide rubber and an acrylonitrile butadiene rubber are mixed at a ratio of 5:95, or utilizing a crosslinking rubber substance consisting of epichlorohydrin oxide rubber and acrylonitrile butadiene rubber having a polar low molecular polymeric characteristic, thus allowing the charge roller to maintain a low volume resistivity of 107Ωcm to 108Ωcm. As a result, the surface of a photosensitive drum can be charged by a minimum charging voltage, to thereby significantly reduce an amount of ozone. A method of manufacturing a charge roller employs peroxide as a cross linking agent for rapidly cross-linking molecular chains between an epichlorohydrin oxide rubber and acrylonitrile butadiene rubber forming a main composition of a foam rubber substance.Since a non-crosslinked low molecular polymeric substance existing at a resilient rubber is significantly reduced, the low molecular polymeric substance of the charge roller may not be migrated onto a surface of the photosensitive drum even if the charge roller is in contact with a photosensitive drum for a long time period during a stoppage of operation of an image forming apparatus, As a result, the charge roller may not cause an abnormal phenomenon on the surface of the photosensitive drum.
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Jo Hae-Seog
Jung Hee-Won
Bushnell , Esq. Robert E.
Davis Robert B.
Rao G. Nagesh
Samsung Electronics Co,. Ltd.
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