| abstract |
[PROBLEMS] To maintain long-term stability without deteriorating image quality or increasing mechanical torque, and to prevent negative afterimage of sponge roller cycle, background fog due to uneven toner charge amount, and development transfer. Provided is an image forming apparatus capable of preventing deterioration, deterioration of resolution, and positive afterimage of a developing roller cycle due to toner selective development. A developing container containing a one-component developer, In an image forming apparatus including a developing device having an image carrier, a developer carrier, and a developer supply member, the developer carrier has an outer diameter Dd and a surface linear velocity Vd, and the developer supply member has , The outer diameter Dr and the surface linear velocity Vr, and D The configuration is such that d ≧ Dr and Vd = Vr hold. |