18937332. IMAGE FORMING APPARATUS (CANON KABUSHIKI KAISHA)
IMAGE FORMING APPARATUS
Organization Name
Inventor(s)
Tomoo Akizuki of Kanagawa (JP)
Yusuke Shimizu of Kanagawa (JP)
IMAGE FORMING APPARATUS
This abstract first appeared for US patent application 18937332 titled 'IMAGE FORMING APPARATUS
Original Abstract Submitted
An image forming apparatus includes a photosensitive member, a charging member, an exposing unit to expose a surface of the photosensitive member, and a developing member to supply toner with normal polarity at a developing portion. A controller, during a non-image formation when a toner image is not formed on a surface of the photosensitive member, controls such that a developing voltage is changed in a predetermined voltage width by applying a first developing voltage while the area of the photosensitive member on which a first surface potential is formed passes through the developing portion and by applying a second developing potential of an opposite polarity side rather than the first developing voltage while the area of the photosensitive member on which a second surface potential is formed passes through the developing portion, and the controller controls such that the surface potential becomes a side of the normal polarity rather than the first developing voltage.