| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a development apparatus capable of effectively preventing co-rotation phenomenon of a developer recovered to a second conveyance part associated with the rotation of a developer carrier even when the diameter of the developer carrier is reduced or even when the circumferential speed of the developer carrier is increased. <P>SOLUTION: A development chamber 41a supplies a developer to a developing sleeve 44 while transporting the developer along the developing sleeve 44. An agitation chamber 41b has both ends communicating with the development chamber 41a and transports the developer in a direction opposite to the development chamber 41a while recovering the developer from the developing sleeve 44. A surface 101a of a co-rotation prevention member 101 is arranged at an angular position of an interval of magnetic poles of the same polarity of a magnet roller 45, and faces the developing sleeve 44 with a gap between them to separate the development chamber 41a and the agitation chamber 41b from each other. The surface roughness of the surface 101a is larger than that of the developing sleeve 44. <P>COPYRIGHT: (C)2013,JPO&INPIT |
