| 摘要 |
PURPOSE:To reduce the amount of a scattering developer greatly, prevent an optical system and an electrostatic charge system from being stained for a long period, and form a stable image by providing a conductive member at the downstream side of a developing part opposite to a latent image holding member, and rectifying an alternate developing bias voltage and applying the conductive member with a voltage having the same polarity that the charge of the developer has. CONSTITUTION:The conductive member 8 is provided to the end part of a hopper 3 at the downstream side of the developing part A opposite to the latent image holding member 6. A power source 9 which impresses the conductive member 8 with the voltage having the polarity opposite to the surface potential of the latent image holding member, i.e. the same polarity with the charge of the toner has a circuit which rectifies a voltage from an alternating developing bias power source 7. Scattering toner at the developing part A sticks on the latent image holding member with electric field of the conductive member and latent image holding member when arriving at the gap between the gap under the influence of gravitation and wind generated by the rotation of a photosensitive drum as the latent image holding member 6, thereby reducing greatly toner scattering out of the developing device. |
