Patent ID: 8126374

Claim:
A color image forming apparatus to print a color image on a printing medium, the color image forming apparatus comprising: a plurality of developing units, each of the developing units to develop an image with developer, each of the developing units including a developer inlet; a plurality of developer cartridges, each of the developer cartridges including a developer outlet provided at an end region of the developer cartridge in a depth direction thereof to discharge developer; and a plurality of developer supplying paths, each of the developer supply paths provided between a respective one of the developer cartridges and a respective one of the developing units to transfer developer from the developer outlet of the respective one of the developer cartridges to the developer inlet of the respective one of the developing units, wherein one of the developer cartridges comprises: a developer container housing having an elongated storage space extending in the depth direction to contain developer; a first agitator rotatably mounted in the developer container housing; a second agitator rotatably mounted in the developer container housing; and an auger rotatably mounted in the developer container housing to receive developer agitated by the first agitator and the second agitator, and to transfer the received developer in the depth direction toward the developer outlet, the auger disposed in parallel relationship with respect to the first agitator and the second agitator, wherein one of the first agitator and the second agitator is operable to rotate in a clockwise direction and the other one of the first agitator and the second agitator is operable to rotate in a counterclockwise direction.