| 摘要 |
PURPOSE:To always achieve a constant image density. CONSTITUTION:A mesh member 8 is disposed between a developing roller 5 and a brush roller 7. A developer is moved to the developing roller 5 via the mesh member 8 by the rotation of the developing roller and simultaneously, an uniform developer thin layer is formed on the developing roller 5 by rubbing the developer on the mesh member 8. At this time, the pressing force of the developer with respect to the mesh member 8 is adjusted according to the surface potential of the photosensitive body, so that the constant image density is obtained regardless of the deterioration, etc., of the photosensitive body 1. |
