| 摘要 |
PURPOSE:To prevent the color of toner from becoming turbid and the quality of a copy image from being deteriorated by polishing the surface of a photosensitive material with a black developer including an abrasive according to information from a counter means which detects the number of copies the same original. CONSTITUTION:When the plural number of copies of the same original is performed, the number of copies is detected with a number counter, and for example, when a detected number of copies is multiple on 10, the clutch of a developing device is activated and a photosensitive belt 1 makes one revolution with a control part at a state where a copy lamp 12 and an electrification charger 16 are turned off after developing by a developing device 6 is completed. At this time, the black developer including the abrasive is slided with the photosensitive belt 1, and the surface of the photosensitive belt 1 is polished and cleaned. Thereby, the toner remaining on the surface of a photosensitive material without being removed with a cleaning device can be removed, and memory phenomenon can be prevented, and the quality of a color image can be improved. |
