| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a developing device which prevents stay of toner on the supply roller surface and image unevenness without enlargement. <P>SOLUTION: An air pump 33a is expanded and contracted by a cam 33b rotated interlocking with rotation of a developing roller 21, a toner supply roller 22 or a toner agitating conveying member 28 and forcibly feeds air to a blow pipe 32b. The air is fed through the blow pipe 32b to an air blow nozzle 31, blown off from each air blow hole 31a of the air blow nozzle 31, and blown to the toner in the vicinity of the toner supply roller 22, the developing roller 21, and the curved tip part 23a of a toner layer thickness regulating member 23. Thereby, the toner is efficiently loosened and favorably circulated by increase of the flowability, and stay of the toner in the vicinity of the toner layer thickness regulating member 23a of the toner layer thickness regulating member 23 is prevented. <P>COPYRIGHT: (C)2009,JPO&INPIT |
