Fitzpatrick, Cella, Harper & Scinto
Cleaning apparatus and process cartridge
 A cleaning container having a highly durable drum in which removed toner is efficiently accumulated by toner conveyance having a backflow preventive function and upward conveyance. Optical fill-up detection is provided for detecting that the container is full of removed toner before a malfunction is caused. The cleaning container is divided into three chambers, a cleaning chamber, a removed toner accumulating chamber and an intermediate conveying chamber by one partition plate. In the cleaning chamber, toner is conveyed with a screw, and in the intermediate conveying chamber, toner is conveyed upward by a cylindrical impeller having ribs, guide. In removed toner small chambers partitioned with partition ribs, toner is stored from the upstream side with a screw partially having a reversed helical configuration, and in the small chamber at the most downstream side, the fill-up is optically detected. A cleaning member for fill-up detecting windows cleans in order of a top face window, then a side face window, and has ribs for preventing toner from flowing in at both sides of the windows. 
Canon Kabushiki Kaisha
G
G03G
inventional
Kazunari Tomonori
Murayama Mori