ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,558,892, issued on Feb. 24, was assigned to RISO Technologies Corp. (Tokyo).
"Liquid ejection head" was invented by Minoru Koyata (Mishima Shizuoka, Japan) and Takashi Tozuka (Sunto Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "According to one embodiment, a liquid ejection head includes a substrate and an actuator on a first surface side of the substrate. The actuator has pressure chambers and air chambers. Each pressure chamber is connected to an opening in the substrate extending from a second surface side of the substrate to the pressure chamber. A manifold is on the second surface side of the substrate and connected to the opening ...