Abstract: A driving force member for receiving rotational driving force includes a base portion, a projection portion including three planar surfaces, the three planar surfaces arranged such that if they were extended and viewed in cross section perpendicular to the axis of the projection, they would intersect at 120 degrees in the form of an equilateral triangle, the three planar surfaces corresponding to a partial length of each side of the triangle respectively and offset from the center of each respective side of the triangle, and three joining portions joining each of the three planar surfaces, the three joining portions lying entirely within the equilateral triangle.

Abstract: 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.

Abstract: A cover (4) adapted for protecting a photosensitive member (2) of a process cartridge (1), the cover (4) comprising a filter (5) adapted to capture airborne particles from air flowing around or through the cover (4). Preferably, the filter (5) takes the form of a High Efficiency Particulate Air Filter, or “HEPA”, which contains micron sized pores for capturing the very smallest airborne particles.

Abstract: The invention relates to a process cartridge for an image forming apparatus, wherein the cartridge includes frame and a removable toner hopper that is connected to the frame by a screw. The use of a screw as the means for attaching the hopper to the cartridge frame simplifies assembly and remanufacture/refilling of the cartridge.

Abstract: A bearing is provided at each longitudinal end of the cartridge frame. The bearing has mounting apertures for mounting the developing roller and regulating blade, and for maintaining a predetermined spacing between the developing roller and the regulating blade. The bearing is moveable relative to the cartridge frame to allow relative movement between the developing roller and photosensitive drum. A coil spring is also provided to bias the bearing toward the drum to create the required gap between the developing roller and drum. The gap is maintained by spacers mounted on the longitudinal ends of the developing roller. In addition, an abutting portion is provided on the bearing and is engageable with a stop portion on the cartridge frame to limit movement of the bearing toward the operative position photosensitive member.

Abstract: A cover (4) adapted for protecting a photosensitive member (2) of a process cartridge (1), the cover (4) comprising a filter (5) adapted to capture airborne particles from air flowing around or through the cover (4). Preferably, the filter (5) takes the form of a High Efficiency Particulate Air Filter, or “HEPA”, which contains micron sized pores for capturing the very smallest airborne particles.