Patent ID: 7333744

Claim:
An image forming apparatus having a plurality of photosensitive member linear velocities, comprising: a charge apparatus that charges by uniformly superimposing on a photosensitive member an alternate current bias voltage with a fixed frequency over a direct current bias voltage as the charge bias voltage; an exposure apparatus that exposes the surface of the charged photosensitive member based on image data, and writes a latent image; a developing apparatus that supplies toner to and makes visible the latent image formed on the surface of the photosensitive member; a transfer apparatus that transfers the visible image on the photosensitive member to a transfer medium; and a cleaning apparatus that cleans the surface of the photosensitive member after transfer, wherein the image forming apparatus comprises a filming removal mode that removes filming on the surface of the photosensitive member; and the filming removal mode is selected corresponding to the plurality of photosensitive member linear velocities.