US Patent 7995931 Image forming apparatus

A image forming apparatus includes a photosensitive drum having a high-lubricity state layer. In an initial rotation operation performed after mounting a process cartridge, in a main assembly of the image forming apparatus, a process cartridge in which lubricating particles are not applied in a contact area between a fresh cleaning blade and the photosensitive drum, toner is supplied only by application of a developing bias after the photosensitive drum and a developing sleeve are driven to supply and stagnate the toner in the contact area between the cleaning blade and the photosensitive drum.