Fitzpatrick, Cella, Harper & Scinto
Contact-type charging member which includes an insulating metal oxide in a surface layer thereof
 A charging member for use in a contact charging device which charges a charge-receiving member such as a photosensitive drum in a copier or printer by applying a voltage to the charging member and contacting the charging member to the charge-receiving member. The charging member includes at least an elastic layer and a surface layer disposed thereon which contacts the charge-receiving member. The surface layer includes at least a semiconductive resin and an insulating metal oxide contained in the semiconductive resin, and the surface layer has a maximum height of surface roughness (Rmax) of 10 .mu.m to 100 .mu.m. 
Canon Kabushiki Kaisha
G
G03G
inventional
Yasuyuki Takashi
Suzuki Yamashita