US Patent Issued to Seiko Epson on June 23 for "Droplet ejection head and printer" (Japanese Inventors)

ALEXANDRIA, Va., July 15 -- United States Patent no. 12,661,890, issued on June 23, was assigned to Seiko Epson Corp. (Tokyo).

"Droplet ejection head and printer" was invented by Yasuaki Hamada (Chino, Japan), Yasuhiro Itayama (Kai, Japan), Koji Ohashi (Matsumoto, Japan), Kazuya Kitada (Matsumoto, Japan), Yoshiki Yano (Chino, Japan) and Masao Nakayama (Shiojiri, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A droplet ejection head includes a nozzle plate having a nozzle, a pressure chamber forming substrate having a pressure chamber, a vibration plate, and a piezoelectric element containing potassium, sodium, and niobium and formed on the vibration plate. The piezoelectric element includes a first ele...