| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the need of the removing operation of an alumite layer and to execute perfect electric connection by the use of an ordinary flange by fitting the conductive flange in cylinder base substance where the maximum height of the surface roughness of the inner surface of a flange fitting part is set to a specified value. SOLUTION: In this cylindrical electrophotographic photoreceptor 1, the flange fitting parts in which the conductive flange 3 is fit are formed at both ends of the aluminum cylinder base substance 2. The inner surface of the flange fitting part is made the rough surface so that the maximum height of the surface roughness in an alumite treated state may be >=5μm. The surface of the base substance 2 the inner surface of the flange fitting part of which is made the rough surface is anodized. By press-fitting and engaging the flange 3 in the flange fitting part, one part of the alumite layer formed on the inner surface of the flange fitting part is ruptured, and the aluminum material of the base substance 2 and the flange 3 are connected and electrically coupled. |
