Patent ID: 7522857

Claim:
An image forming apparatus comprising: a latent electrostatic image bearing member; a charging unit configured to uniformly charge a surface of the image bearing member; an exposing unit configured to form a latent electrostatic image on the surface of the charged image bearing member; a developing unit configured to develop the latent electrostatic image formed on the surface of the image bearing member by supplying a toner to form a visible image; a transferring unit configured to transfer the visible image formed on the surface of the image bearing member to a recording medium; a fixing unit configured to fix the visible image on the recording medium by application of at least one of heat and pressure; a cleaning unit configured to clean a residual toner on the image bearing member; and a toner replenishing device configured to replenish the toner to the developing unit, wherein the toner replenishing device comprises a pump configured to supply the toner and a toner container arranged in conjunction with the pump, and wherein the toner is contained in the toner container, and comprises a binder resin, a colorant and a releasing agent and has a dynamic friction coefficient of 0.15 to 0.35.