| 摘要 |
PURPOSE:To develop an electrostatic latent image formed on the surface of a lower image formation body by partitioning a developer chamber and a developing roller chamber with a layer thickness control plate which controls the layer thickness of a developer and a reduction gate plate which contacts a developing roller elastically. CONSTITUTION:The upper developer chamber 1 and lower developing roller chamber 5 are partitioned with the layer thickness control plate 7, developing roller 6, and reduction gate plate 8. Therefore, there is no developer falling except a developer which is carried from the developer chamber 1 by being stuck on the developing roller 6, and the electrostatic latent image formed on the image carrier 13 is developed in a development area where the developing roller 6 projects from an opening A by using the developer layer carried stuck on the developing roller 6. When the image is developed, a developing bias voltage is applied to the sleeve 6a of the developing roller 6 from a bias power source so as to develop a sharp image. Consequently, the electrostatic latent image formed on the surface of the lower image formation body arranged by the arrangement above the image formation body to develop the electrostatic latent image without staining the image formation body surface. |
