| 摘要 |
PURPOSE:To prevent the occurrence of a white stripe by bringing the surface of a film material into press-contact with the surface of a developer carrier with pressure, passing magnetic developer between the surface of the film material and the surface of the developer carrier, and forming a thin layer of magnetic developer on the developer carrier. CONSTITUTION:Dry magnetic developer D replenished in a developing device 2 where it is agitated, triboelectrified and uniformized, is carried to a developing sleeve 3 which rotates in an arrow direction. Although the developer D is almost held on the surface of the developing sleeve 3 with its rotation and is carried to a developing area 12, the developer D passes between the film material 52 of a layer thickness regulating member 5 and the surface of the developing sleeve 3 because there is the layer thickness regulating member 5 being in press-contact with the surface of the developing sleeve 3 by a coil spring 57 on the way. Then, the layer thickness of the developer D is regulated, and the developer which turns into a stable and uniform thin layer, reaches the developing area 12, and is electrostatically attracted to the latent image part of a photosensitive body drum 1, where development is performed. Thus, a picture free of a white stripe can be obtained. |
