| 摘要 |
PURPOSE:To obtain an image of high quality stably even when a non-magnetic developer is used by setting the surface moving speed of a developer supplying means smaller than that of a developer conveyer. CONSTITUTION:The toner supply means 5 is supported rotatably while pressed against the surface of the developing sleeve 1 which conveys a developer to a photosensitive belt 7. The ratio of the peripheral speeds of the sleeve 1 and supply member 5 is set to 3:2-3:1 and they are moved in the same direction while contacting each other; the toner is not supplied to the sleeve surface rather too much and when the both slide are brought into slide contact having a deviation in movement, the toner is pressed at the contacting part C and charged by friction electrostatically and efficiently and the layer thickness is also controlled. Therefore, even when a nonmagnetic developer is used, an image of high quality is obtained stably. |
