| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a one-component development apparatus with which the optimization of a toner is made possible and high definition can be obtained for a long period of time as a toner supply roller and a development system, an image forming apparatus which has high transfer performance. <P>SOLUTION: The development apparatus 4 uses the toner supply roller 412 of the following configuration: A suction nozzle having a prescribed opening disposed at the tip of a pipe connected to a suction pump is brought into pressure contact with the outer peripheral surface of the toner supply roller, at least the outer peripheral surface of which is formed of a foam; air is sucked from the outer peripheral surface of the toner supply roller and the internal pressure of the suction pipe is measured; and the measured value of this time is ≤(Ax150)kPa when the flow rate of the air sucked by the suction nozzle is defined as A liter/minute. In the above apparatus, the toner 10 is 3 to 8 μm in weight average grain size and the ratio (D4/D1) of the weight average grain size (D4) and a number average grain size (D1) ranges from 1.00 to 1.40. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
