| 摘要 |
<p>To form a sharp image free from image flow or fog with an electrophotographic apparatus which uses an a-Si photo-sensitive drum charged uniformly by having resort to the discharge phenomenon, the electrophotographic apparatus comprises an electrophotographic photo-sensitive drum having a surface (1c, 1c1, 1c2) being represented by the elementary ratio composition formula a-Si1-xCx:H, with 0.95 ≤ x < 1, the dynamic indentation hardness of the upper surface layer being 300 kgf/mm<2> or below, the hardness of said surface layer being higher on the inner side towards said photoconductive layer than on the outer surface side, preferably being gradually increasing as one goes from the outer surface side toward the inner side, at said photoelectric layer, and a developing unit (4) using a developer composed of carrier and toner particles being caused to rub the drum surface and being recovered in a developer vessel (41). The temperature of said photosensitive drum surface with respect to said developer vessel is held in a range of 0 to +10 DEG C. The developer used for the development contains a conductive abrasive having a volume resistivity ranging from 10<2> to 10<10> OMEGA .cm. The peripheral speed of a transfer roller (5) is set to be slightly higher than the peripheral speed of the drum. <IMAGE></p> |
