US Patent Issued to Canon on June 30 for "Drum cartridge" (Japanese Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,669,761, issued on June 30, was assigned to Canon K.K. (Tokyo).

"Drum cartridge" was invented by Satoshi Nawa (Chiba, Japan) and Michihiro Takahashi (Chiba, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a drum cartridge attachable to an image forming apparatus that includes a casing, a drum shaft bearing, a photosensitive drum rotatably supported by the drum shaft bearing, a charging roller for charging the photosensitive drum, a charging roller bearing, a charging roller urging member, a cleaning roller for cleaning the charging roller, a cleaning roller bearing, and a cleaning roller urging member. The charging roller is regulated ...