| 摘要 |
PROBLEM TO BE SOLVED: To provide a developing device that can suppress a filter member provided in a pressure relief opening from clogging, and a process cartridge and an image forming apparatus that include the developing device.SOLUTION: There is provided a developing device 5 including: a developing roller 51 that carries a two-component developer G on its surface and makes a surface movement to supply a toner to a latent image on the surface of a photoreceptor in a developing area; a housing 59 that forms a developer storage part accommodating the developer G to be supplied to the developing roller 51 and has a through-hole 61 formed therein; and a filter 60 that prevents the developer G from being discharged from the through-hole 61, where the through-hole 61 is formed opposite to a position on the upstream side of a retention position before agent release on the surface of the developing roller 51 and on the downstream side of an airflow generation part 511; the developing device brings the developer G carried at the retention position before agent release before performing reverse control into contact with the filter 60 by the reverse control, the reverse control causing the developing roller 51 to make a surface movement in the direction reverse to that during a developing operation.SELECTED DRAWING: Figure 1 |
