ALEXANDRIA, Va., March 31 -- United States Patent no. 12,589,596, issued on March 31, was assigned to SCREEN Holdings Co. Ltd. (Kyoto, Japan).
"Inkjet printing apparatus" was invented by Yuto Suzuki (Kyoto, Japan) and Hideaki Onishi (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "This apparatus includes an external tank in which ink is stored outside a circulation path, a branch pipe connecting a branch point on the circulation path and the external tank, an external pump that delivers ink from the external tank to the circulation path, a switch valve, and a temperature sensor that detects a temperature of ink in the circulation path. The switch valve can switch between a state in which the exte...