Patent ID: 9563145
Date: 2017-02-07
CPC Classifications: G03G

Claim:
1. An image forming apparatus, comprising: an image carrier that carries, on its surface, a developer image formed by a developer including external additives, a charging member to which a charging voltage is applied for charging the surface of the image carrier, a developer carrier that carries the developer and to which a development voltage is applied for forming the developer image on the surface of the image carrier, a developer supply member to which a supply voltage is applied for supplying the developer to the developer carrier, a main controller that controls an image formation mode for developing the developer image on a recording medium and controls a cleaning sequence mode that is other than the image formation mode and cleans the charging member, and a voltage controller that changes outputs of the charging voltage, the development voltage and the supply voltage, and executes the cleaning sequence mode based on instructions of the main controller, wherein when executing the cleaning sequence mode, the voltage controller makes an absolute value of the charging voltage larger than that in the image forming mode, and afterwards sets the output of the charging voltage to an OFF state, and the voltage controller performs another voltage output control that is a process in which a polarity of the development voltage in the cleaning sequence mode is made opposite to that in the image forming mode, and the output of the supply voltage is set to the OFF state.