Transfer roller of an electrophotographic printing apparatus for protecting photoconductive drum from staining and method of manufacturing transfer roller

摘要

There is disclosed, in an image forming apparatus using electrophotography having a photoconductive drum rotating in a clockwise direction and at a predetermined velocity, a charging roller for uniformly charging the photoconductive drum's outer surface, and a scanner unit for scanning the photoconductive drum's charged area to form a latent image thereon, a transfer roller for preventing the photoconductive drum from being stained with toner that is manufactured to have different properties at its center than at its edges so as to prevent a large quantity of positive charges from being applied to the edges of the photoconductive drum and the edges of the charging roller which are not in contact with the paper.