Image forming apparatus

摘要

An image forming apparatus is provided that includes a photosensitive drum; a laser scanner unit; a developing roller; a transfer roller; and a cleaning device. The cleaning device absorbs residual toner left on the surface of the photosensitive drum after a transfer process from the surface of the photosensitive drum by using a potential difference from the photosensitive drum in an absorption mode and for blowing off and dispersing the absorbed toner to the surface of the photosensitive drum by using another potential difference from the photosensitive drum in a blowing-off mode. The apparatus further includes a first power supply that provides a first voltage different from an electric potential of the ground to the cleaning device; a second power supply that provides a second voltage different from the electric potential of the ground and different from the first voltage to the photosensitive drum; and a switch for switching the image forming apparatus to the absorption mode by connecting the cleaning device to the ground and for switching the image forming apparatus to the blowing-off mode by connecting the cleaning device to the first power supply.