| 摘要 |
PURPOSE:To form a distinct image and to improve development efficiency by providing a fixed electrode consisting of a conductive non-magnetic member in the state of non-contact with an image carrier in the vicinity of a developing gap between an electrostatic latent image carrier and a toner carrier, and forming an electric field where a magnetic toner can be transferred to the image carrier side, between the fixed electrode and the image carrier. CONSTITUTION:A fixed electrode 3 consisting of a conductive non-magnetic member is provided by maintaining the state of non-contact with an electrostatic latent image carrier 1 in the vicinity of a developing gap between the image carrier 1 and a high resistance magnetic toner carrier 2. Subsequently, the fixed electrode 3 is applied to a ground or a prescribed bias voltage, and between the fixed electrode 3 and the image carrier 1, an electric field where a magnetic toner 10 can be transferred to the image carrier 1 side. In such a way, even when recording speed becomes high, the distinct image is formed and the development efficiency can be improved. |
