Patent ID: 8649704

Claim:
A bias charging member comprising: a) a conductive core, b) a base material selected from the group consisting of isoprene rubber, chloroprene rubber, epichlorohydrin rubber, butyl rubber, polyurethane, silicone rubber, fluorine rubber, styrene-butadiene rubber, butadiene rubber, nitrile rubber, ethylene propylene rubber, epichlorohydrin-ethylene oxide copolymer rubber, epichlorohydrin-ethylene oxide-allyl glycidyl ether copolymer rubber, ethylene-propylene-diene terpolymer copolymer rubber, acrylonitrile-butadiene copolymer rubber (NBR) and natural rubber disposed on the conductive core, wherein the base material has a thickness of from about 10 mm to about 20 cm; and an outer surface layer disposed on the base material, the outer surface layer comprising a conductive additive and polycarbonate wherein the outer surface layer has a surface resistivity of equal to or greater than about 1×10 13 ohm/and wherein the outer surface layer has a thickness of from about 0.1 μm to about 500 μm.