Methods of producing a photoconductor unit for charging evenly a photoconductive surface

摘要

An image forming apparatus includes an image bearing member and a charging roller with a pair of gap forming members (103). The image bearing member has a photoconductive surface including an image forming area for bearing an electrostatic latent image. The charging roller of circular cross section has a metallic core (101) and a rotational axis in parallel with and close to the image bearing member, and a charging surface (102) with a first radius for charging the photoconductive surface. Each of the pair of gap forming members of circular cross section has a second radius such that a difference between the second radius and the first radius is substantially constant through a whole rotational phase of the charging roller, so that the gap forming members form a uniform gap between the moving image forming area and the rotating charging surface.