Patent ID: 9274442
Filing Date: 2016-03-01
CPC Classification: G03G

Claim Text:
1. An electrophoto graphic image forming apparatus comprising: an electrophotographic photosensitive member, a charging unit in contact with the electrophotographic photosensitive member so as to charge the electrophotographic photosensitive member with a charging member, and a developing unit which supplies toner to the electrophotographic photosensitive member on which an electrostatic latent image is formed, to form a toner image on the electrophotographic photosensitive member; wherein, the electrophotographic photosensitive member comprises: a support, a charge generation layer disposed on the support, and a charge transport layer disposed on the charge generation layer; the charge transport layer is a surface layer of the electrophotographic photosensitive member, the charge transport layer has a matrix-domain structure comprising a matrix and a domain, the domain comprises a polyester resin A having: a structural unit represented by the following Formula (A) and a structural unit represented by the following Formula (B), and the matrix comprises: at least one resin selected from the group consisting of a polyester resin C having a structural unit represented by the following Formula (C) and a polycarbonate resin D having a structural unit represented by the following Formula (D) and a charge transport substance, wherein, the charging member comprises an electro-conductive substrate, and an electro-conductive elastic layer; the electro-conductive elastic layer comprising a binder, and holding a bowl-shaped resin particle having an opening, so that at least a part of the bowl-shaped resin particle is exposed, and the charging member has a concavity derived from the opening of the bowl-shaped resin particle on the surface thereof, and a protrusion derived from an edge of the opening of the bowl-shaped resin particle on the surface thereof; the protrusion on the surface of the charging member coming into contact with the electrophotographic photosensitive member: wherein, X R n represents the number of repetitions of a structure in brackets, an average value of n in the polyester resin A is 20 or more and 120 or less; wherein, X wherein, R X Y wherein, R Y