ALEXANDRIA, Va., April 7 -- United States Patent no. 12,596,325, issued on April 7, was assigned to Canon K.K. (Tokyo).
"Process cartridge" was invented by Shintaro Noji (Shizuoka, Japan), Yuhei Terui (Shizuoka, Japan), Takashi Kenmoku (Shizuoka, Japan) and Kodai Hayashi (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A process cartridge is configured such that a movement direction of a surface of a developing roller is opposite to a movement direction of a surface of a toner supplying roller in a position where the developing roller is in contact with the toner supplying roller, the developing roller and the toner supplying roller rotate to satisfy a peripheral speed ratio R of 1.1 to 2.5, a...