ALEXANDRIA, Va., July 15 -- United States Patent no. 12,661,679, issued on June 23, was assigned to SEIKO EPSON Corp. (Tokyo).
"Liquid ejection device" was invented by Takeshi Seto (Shiojiri, Japan), Hirokazu Sekino (Chino, Japan) and Yasunori Onishi (Shiojiri, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid ejection device includes: a nozzle through which a liquid is ejected; a liquid transport pipe that transports the liquid to the nozzle; and a vibrator that is configured to generate a vibration. The vibrator is in contact with at least one of the liquid, the nozzle, and the liquid transport pipe, and a vibration frequency generated by the vibrator is higher than a self-droplet formation fre...