US Patent Issued to CANON on Nov. 3 for "Developing device with plural rotation members and magnets" (Japanese Inventors)

ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,782,846, issued on Nov. 3, was assigned to CANON K.K. (Tokyo).

"Developing device with plural rotation members and magnets" was invented by Chihiro Tanaka (Chiba, Japan) and Yuji Ohkubo (Ibaraki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The developing device includes a first rotatable member, a first magnet, a second rotatable member, and a second magnet. When a position where, on the second rotatable member surface, a magnetic flux density of the receiving pole is maximum, is a point T, of a position where the magnetic flux density of the receiving pole is a half value of the maximum on an upstream side is a point Hu, the position on a downs...