PURPOSE: To prevent an electrostatic charging member from being deteriorated and to use a cleaning member for a long period by bringing the cleaning member into contact with the electrostatic charging member at least at some time during electrostatic charging for forming an image on an image carrier by the electrostatic charging member is not performed.
CONSTITUTION: By depressing a start button, a main motor is rotated, a photosensitive drum 2 coupled and driven by the main motor is rotated, and an electrostatic charging roller 3 pressed to the drum 2 is rotated by following the drum 2 in an electronic copying machine. The cleaning member 1 is pressed to the roller 3 by solenoid 10 only at the time of cleaning, and it is separated from the roller 3 except at the time of cleaning. The time when the member 1 is pressed is set to the time when the roller 3 is rotated three times, for example. In a contact electrostatic charging system in which the member 3 is directly brought into contact with the image carrier 2, fine powder and dust, etc., adhering to the member 3 are removed, and the potential drop and the local faulty electrostatic charging of the image carrier 2 are prevented, and the members 1 and 3 are prevented from excessively being rubbed each other.
HONDA TAKAO
ARATAIRA FUMIHIRO
