| 摘要 |
PURPOSE:To keep the surface temperature of a photosensitive body uniformly by arranging plural heating means for heating a cylindrical photoconductive photosensitive body dividedly in the axial direction and controlling the heating means by plural temperature detecting means dividedly arranged in the axial direction. CONSTITUTION:A rotary shaft 2 is supported by a supporting body 3 at the center part of the cylindrical photosensitive body 1 and the heaters 4a-4e divided by heat insulating members 6 are arranged in the rotary shaft 2 in the axial direction. The temperature detecting elements 5a-5e for detecting the surface temperature of the photosensitive body are dividedly arranged on the outside of the photosensitive body 1 so as to be opposed to the heaters 4a-4e. The elements 5a-5e are connected to a control device 7, and when respective detecting signals reach the prescribed temperature, control the heaters 4a-4e individually. Thus, the surface temperature of the photosensitive body can be uniformly kept almost over the whole length during the copying work. In addition, the power consumption can be reduced and the photosensitive body can be prevented from damage due to partial excessive temperature rise. |
