Patent ID: 9581955
Date: 2017-02-28
CPC Classifications: G03G

Claim:
1. A drum unit comprising; a first photosensitive drum rotatable about a first rotational axis extending in a first direction, the first photosensitive drum including a first drum body having a first photosensitive layer; a second photosensitive drum rotatable about a second rotational axis extending in a second direction, the second photosensitive drum including a second drum body having a second photosensitive layer, the first direction being parallel to the second direction, the second photosensitive drum being disposed apart from the first photosensitive drum in an arranged direction perpendicular to the first direction and the second direction; a first side plate disposed apart from the first drum body in the first direction and disposed apart from the second drum body in the second direction; a first cleaning unit having a first cleaner and a first conveyor, the first cleaner being configured to remove waste toner from the first photosensitive drum, the first conveyor configured to convey the waste toner removed by the first cleaner in the first direction; a second cleaning unit having a second cleaner and a second conveyor, the second cleaner being configured to remove waste toner from the second photosensitive drum, the second conveyor being configured to convey the waste toner removed by the second cleaner in the second direction; and a waste-toner conveyor unit having a collecting conveyor configured to convey the waste toner conveyed by the first conveyor and the waste toner conveyed by the second conveyor, wherein at least a first portion of the collecting conveyor is disposed between the first side plate and the first drum body and is within a projection of a circumference of the first photosensitive drum body onto the first side plate, wherein at least a second portion of the collecting conveyor is disposed between the first side plate and the second drum body and is within a projection of a circumference of the second photosensitive drum body onto the first side plate, wherein the collecting conveyor is disposed below and is overlapped by the first conveyor and the second conveyor, wherein the drum unit is configured to be inserted into and moved from a printer body, and wherein the first side plate is movable from the printer body along with the first photosensitive drum and the second photosensitive drum in a direction perpendicular to the axis of the first photosensitive drum.