Patent ID: 7869749

Claim:
A semiconductive rubber roller comprising a toner-transporting portion formed as an outermost layer on the rubber roller, wherein the toner transporting portion has a thickness of 3 to 15 mm and is formed essentially of vulcanized rubber containing 0.1 to 30 parts by mass of halogenated copper phthalocyanine for 100 parts by mass of a rubber component of said vulcanized rubber, said rubber component comprising a combination of chloroprene rubber and epichlorohydrin copolymer, a combination of chloroprene rubber, epichlorohydrin copolymer and polyether copolymer, or a combination of chloroprene rubber and acrylonitrile butadiene rubber, wherein said semiconductive rubber roller has an electrical resistance value measured at a temperature of 23° C. and a humidity of 55% in a range of 10 3 to 10 9 Ω, when a voltage of 100V is applied thereto.