ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,510,846, issued on Dec. 30, was assigned to CANON K.K. (Tokyo).
"Developing device" was invented by Kazunari Hagiwara (Kanagawa, Japan), Takashi Hiramatsu (Tokyo) and Yu Fukasawa (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A developing device having a developing portion and an agitating member agitating developer in a developer accommodating portion, the developer accommodating portion and the developing portion are connected to each other via an opening portion, and a sealing sheet connected to the agitating member is fixed to a periphery of the opening portion for sealing, and the sealing sheet can be removed from a fixing portion by operati...