Patent ID: 9335727
Filing Date: 2016-05-10
CPC Classification: G03G

Claim Text:
1. A drum cartridge comprising: a photosensitive drum rotatable about an axis; a first cleaning roller including a first shaft extending in a direction extending along the axis; a second cleaning roller including a second shaft extending in the direction of the first shaft, the second cleaning roller including a surface contacting a surface of the first cleaning roller, the second cleaning roller spaced apart from the photosensitive drum; a bearing through which the first shaft and the second shaft are inserted; a first cleaning gear rotatable with the first cleaning roller; a second cleaning gear rotatable with the second cleaning roller and engaging with the first cleaning gear; a drum gear being rotatable with the photosensitive drum; a first idle gear engaging with the drum gear; a second idle gear engaging with the first idle gear; and a coupling joining the second cleaning gear and the second idle gear, the coupling being disposed between the second cleaning gear and the second idle gear in the direction of the first shaft and rotatable in unison with the second cleaning gear and the second idle gear.