Patent ID: 6330409
Filing Date: 2001-12-11
Classification: F16D,G03G

Abstract:
An electrophotographic image forming apparatus for forming an image on a recording material, to a main assembly of which a process cartridge is detachably mountable, said apparatus comprising:(a) a motor;(b) a main assembly driving rotatable member for receiving driving force from said motor;(c) a hole defined by twisted surfaces, said hole being substantially coaxial with said driving rotatable member;(d) a mounting member for detachably mounting the process cartridge, the process cartridge including:an electrophotographic photosensitive drum,process means actable on said photosensitive drum, anda projection engageable with said twisted surfaces, the projection being provided at a longitudinal end of the photosensitive drum, wherein the projection is non-twisted, and when said main assembly driving rotatable member rotates with said hole and the projection engaged with each other, rotational driving force is transmitted from said driving rotatable member to the photosensitive drum through engagement between said hole and the projection, anda resilient member for urging the process cartridge in a longitudinal direction of the photosensitive drum, to bring the projection and said hole into position for engagement, when the process cartridge is mounted to the main assembly; and(e) a feeding member for feeding the recording material.