Patent ID: 6862418
Filing Date: 2005-03-01
Classification: G03G

Abstract:
1. A color image forming apparatus comprising a multiple number of electrophotographic image forming stations for multiple development colors including black, arranged in line in the paper feed direction, each image forming station having a photoreceptor, a charger, an exposure device, a developing device, a transfer device and a cleaning device, characterized in that the photoreceptors satisfy the following relation: where X represents the reduction in film thickness (Å) per 1×10 7 mm of the traveling distance of the photoreceptor for black development and Y represents the reduction in film thickness (Å) per 1×10 7 mm of the traveling distance of the photoreceptors for the other development colors, and wherein the composition of the binder resin used in the photoreceptor for black development is different from one of the photoreceptors for the other development colors.