Patent Number: 6,254,976

Title: Electrophotographic charging member

Abstract: A charging member for amorphous silicon photoreceptors which can be supplied with a uniform and stable resistivity, exhibits an excellent durability and is insusceptible to variation of resistivity against environmental conditions, pinhole leak and contamination on the photoreceptors, showing a good quality and a long life. An electrophotographic charging member for charging a photoreceptor (preferably, mainly composed of amorphous silicon), which comprises a porous anodized aluminum film formed by anodically oxidizing a support the surface of which is made of aluminum or aluminum alloy. In the charging member, it is preferred that the pores in the porous anodized aluminum film be filled with a metal or an electrically conductive material made of an oxyacid salt of transition metal or pure water be attached to the inner wall of the pores in the porous anodized aluminum film. The charging member of the present invention may comprise a surface protective layer on the porous anodized aluminum film. The surface protective layer preferably is made of an organic high molecular compound or inorganic high molecular compound having electrically conductive fine particles dispersed therein. Alternatively, the surface protective layer may comprise an abrasive dispersed therein.

Inventors: Ono; Masato (Minami Ashigara, JP)

Assignee: Fuji Xerox Co., Ltd.

International Classification: G03G 15/02 (20060101); B32B 003/26 (); G03G 015/00 ()

Expiration Date: 07/03/2018