Patent ID: 7903994
Filing Date: 2011-03-08
Classification: G03G

Abstract:
1. An image forming apparatus for forming an image on a recording material, to which a process cartridge is detachably mountable, wherein the process cartridge includes a photosensitive drum unit and a developing unit, wherein the photosensitive drum unit includes a photosensitive drum, and the developing unit is rotatably engageable with the photosensitive drum unit and includes a developing roller for developing an electrostatic latent image formed on the photosensitive drum, and wherein the developing unit is movable between a contact position in which the developing roller is in contact to the photosensitive drum and a spaced position in which the developing roller is spaced from the photosensitive drum, said apparatus comprising: exposure means for exposing the photosensitive drum with light through a transmission member to form the electrostatic latent image, wherein the exposure means is positioned below the process cartridge when the process cartridge is mounted to a main assembly of the apparatus; moving means for moving the developing unit to the contact position or to the spaced position; and a cleaning member for cleaning said transmission member in interrelation with an operation of said moving means.