A removably mountable frame comprising a driving force receiving means adapted to engage a driving force transmitting means of an image processing apparatus when the removably mountable frame is received within the image processing apparatus; and at least one frame driving force transmitting means, each frame driving force transmitting means adapted to co-axially engage corresponding cartridge driving force receiving means of a cartridge when the cartridge is engagedly received within the removably mountable frame, where the external configuration of the removably mountable frame when the cartridge is received therein is adapted to be received within the image processing apparatus and where the driving force receiving means is further adapted to transfer driving force applied thereto to each of the at least one frame driving force transmitting means.