Patent ID: 8913918

Claim:
An image forming device comprising: a plurality of image bearing members juxtaposed with one another and arranged in a first direction, an endless belt configured to confront each of the plurality of image bearing members arranged in the first direction and to receive developing agent from the plurality of image bearing members; a plurality of developing agent containers each of which is configured to contain a corresponding one of a plurality of colors of developing agents to be supplied to a corresponding one of the plurality of image bearing members, the plurality of developing agent containers being juxtaposed with one another and arranged in the first direction; a cleaning member configured to remove the plurality of colors of developing agents from the endless belt; and a return mechanism configured to convey the plurality of colors of developing agents removed by the cleaning member to one of the plurality of developing agent containers, wherein the one of the plurality of developing agent containers includes a wall defining both a side of a supply chamber configured to contain the corresponding one of the plurality of colors of developing agents to be supplied and a side of a waste chamber configured to contain the plurality of colors of developing agents removed by the cleaning member and conveyed by the return mechanism, wherein the remainder of the plurality of developing agent containers each has a supply chamber configured to contain the corresponding one of the plurality of colors of developing agents to be supplied, and wherein the waste chamber is disposed at a position outward of any of the supply chambers in the first direction.