| 摘要 |
PURPOSE:To enable to store electrostatic creeping image for a long time, by constituting the photo receptor that two photo conductive layers having rectifying property for one are laminated on the conductive base, in the facsimile taking the electrostatic picture formed on the photo receptor as recording medium. CONSTITUTION:The 1st photo conductive layer having rectifying property is formed on a conductive base 11, the 2nd photo conductive layer 13 different from the charging property from the 1st photo conductive layer is formed on it, and the photo receptor 1 in which two types of photo conductive layers are sequentially laminated, is constituted. When negative corona charge is made on the long surface of the photo receptor 1 with the corona charging devices 2, 2' placed around the photo receptor 1, the positive charges move to the boundary of the first photo conductive layer 12 and the second photo conductive layer 13. Next, positive corona charge is made by a little to reduce the surface potential. With this state, exposure of picture is made via original, then the charges corresponding to background section are disappeared and electrostatic creeping image is formed without long time change. |
