| 摘要 |
PURPOSE:To obtain an excellent image which has neither fogging nor a decrease in density by providing a heating device nearby an organic photoconductor which is charged electrostatically and positively and holding the temperature of said organic photoconductor at constant temperature or higher. CONSTITUTION:A photosensitive body 10 incorporates a heater lamp 10a so as to hold its surface temperature at a prescribed temperature or higher. When a power switch is turned on, a lamp 10 is lighted and the photosensitive body 10 is heated to the prescribed temperature. When copying operation is started, the photosensitive body 10 is rotated as shown by an arrow (x) and charged uniformly and positively to enter an exposure process. At this time, the photosensitive body 10 is heated to the prescribed temperature to improve the mobility of positive holes and reduce trapped positive holes, thereby increasing accumulated charges in the photosensitive body 10. Consequently, neither the fogging nor the decrease in density is caused even after repetitive copying operation and a copy image of the same good quality as initial quality is obtained. |
