| 摘要 |
PURPOSE:To form a photosensitive layer having uniform quality and to obtain an image which is free from a drop-out, etc. by specifying the range of the thickness of an elastic material layer and/or the surface roughness of a layer for supporting the photosensitive layer thereby considerably decreasing the uneven contact between a photosensitive drum and developing roller. CONSTITUTION:The thickness of the elastic material layer is specified to >=6mm and/or the surface roughness of the layer for supporting the photosensitive layer is specified to a 0.2-2mum range. The photosensitive drum has the construction consisting in attaching the elastic material layer 3 around a shaft 2 consisting of a rigid body, forming the layer 4 for supporting the photosensitive layer around the elastic material layer 3 and further providing the photosensitive layer 5 around said layer. The shaft 2 is freely rotatably attached to the body of a copying machine. The layer 4 which is molded to a sleeve shape is fitted onto the layer 3 so as not to be shifted and moved in the ordinary use condition. These layers are positioned concentrically with the shaft 2. The photosensitive layer 5 is provided by coating, etc. of inorg. or org. photoconductors such as OPC, selenium, zinc oxide and amorphous materials. |
