| 摘要 |
PURPOSE:To form an excellent picture 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 which, is agitated, triboelectrified and uniformized in a developing device 2 and is carried to a rotating developing sleeve 3. 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 a coil spring 57 or the layer thickness regulating member 5 being in press-contact with the surface of the developing sleeve 3 by magnetic force on the way. Then, the layer thickness of the developer D is regulated, and the developer, being turned 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, an excellent picture free of a white stripe be obtained. |
