ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,409,661, issued on Sept. 9, was assigned to CANON K.K. (Tokyo).
"Liquid discharge apparatus and control method thereof" was invented by Kei Kosaka (Tokyo) and Tetsuya Narazaki (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid discharge apparatus includes a print head with a nozzle discharging a liquid, a pump to suction the liquid from the nozzle, and to eject the liquid into a waste liquid tank, a control unit to change a driving amount of the pump to control an amount of the liquid ejected, and a calculation unit to calculate an amount of the liquid in the tank. The control unit drives the pump by a second driving amount less than a firs...