A toner cartridge wherein the waste bin and the hopper are attached to one another in a non-pivotal interconnection. The parts are attached via a hopper wheel horizontal retainer and a hopper wheel vertical lock formed integrally with the waste bin. The hopper wheel horizontal retainer and the hopper wheel vertical lock are disposed in cooperative relation to one another and are adapted to engage a hopper wheel that forms a part of the hopper. To assemble the toner cartridge, the waste bin is held above the hopper so that the hopper wheel horizontal retainer and the hopper wheel vertical lock are positioned directly above the hopper wheel. The waste bin is lowered until the hopper wheel horizontal retainer engages the hopper wheel and the hopper wheel vertical lock.