Patent ID: 8577259

Claim:
An image forming device comprising: a plurality of photosensitive drums juxtaposedly arrayed in a first direction to form a drum array including a leading photosensitive drum and a trailing photosensitive drum in the first direction, each photosensitive drum extending in a second direction perpendicular to the first direction; a plurality of developer cartridges each detachably mountable on a respective one of the plurality of photosensitive drums, each developer cartridge having a developer accommodating chamber configured to store developer to be supplied to each photosensitive drum and a waste developer accommodating chamber configured to store waste developer to be disposed; an endless belt extending in the first direction and in the second direction and facing each of the plurality of photosensitive drums; a plurality of first collecting units each disposed for a corresponding one of the plurality of photosensitive drums, each first collecting unit being configured to collect the waste developer on the corresponding photosensitive drum; a plurality of first conveying units each disposed for a corresponding one of the first collecting units and configured to convey the waste developer collected by the each first collecting unit toward the waste developer accommodating chamber of the corresponding developer cartridge; a second collecting unit disposed adjacent to the leading photosensitive drum and configured to collect waste developer on the endless belt; a second conveying unit configured to convey the waste developer collected by the second collecting unit toward the waste developer accommodating chamber of the developer cartridge corresponding to the leading photosensitive drum; and a plurality of communication portions each disposed for a corresponding one of the plurality of photosensitive drums and configured to allow fluid communication between each first conveying unit and the corresponding waste developer accommodating chamber, wherein, among the plurality of communication portions, a specific communication portion is configured to allow, in association with the leading photosensitive drum, fluid communication between the second conveying unit and the corresponding waste developer accommodating chamber, wherein the specific communication portion includes: a first communication port configured to be in fluid communication with the first conveying unit in association with the leading photosensitive drum; a second communication port configured to be in fluid communication with the second conveying unit; and a connecting port configured to be in fluid communication with the waste developer accommodating chamber of the leading photosensitive drum, the specific communication portion being configured to convey the waste developer conveyed from the first conveying unit through the first communication port and from the second conveying unit through the second communication port toward the waste developer accommodating chamber through the connecting port.