| 摘要 |
PROBLEM TO BE SOLVED: To provide a development apparatus constituted to prevent the occurrence of image defects, such as image unevenness and image fogging, and to prolong lifetime. SOLUTION: The development apparatus 10 has a nonmagnetic rotary sleeve 14 and a fixed magnet roller 13 which is internally arranged in the rotary sleeve and is equipped with a plurality of magnetic poles. A magnetic blade 15 is arranged to be opposed to the rotary sleeve on a more upstream side in the rotating direction of the rotary sleeve than the developing position most proximate to a photoreceptor drum 16 formed with an electrostatic latent image. The layer thickness of a toner thin layer is regulated by the magnetic blade. A magnet object 17 is arranged in proximity to the magnetic blade on the upstream side in the rotary sleeve rotating direction of the magnetic blade and is moved back and forth in a thrust direction. COPYRIGHT: (C)2005,JPO&NCIPI |
