US Patent 7088944 Developer Cartridge including radially extending drive lug

A developer cartridge, for an image forming apparatus having a shutter, for the delivery of a developer. The developer cartridge includes a body member, at least one delivery opening, and at least one drive lug configured and dimensioned to open and close shutter of an image forming apparatus. The body member is configured to store a developer and defines first and second ends and a longitudinal axis. The delivery opening is configured to dispense developer. The drive lug extends radially outwardly from the body member and is longitudinally aligned with at least some portion of the delivery opening, wherein the drive lug is configured and dimensioned to open and close a shutter of an image forming apparatus.