US Patent Issued to Seiko Epson on June 24 for "Maintenance method of head unit" (Japanese Inventor)

ALEXANDRIA, Va., June 25 -- United States Patent no. 12,337,598, issued on June 24, was assigned to Seiko Epson Corp. (Tokyo).

"Maintenance method of head unit" was invented by Shinichi Tsubota (Azumino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a maintenance method of a head unit including a first nozzle array and a second nozzle array, the method including: in a first period, supplying a first driving signal having a first waveform to one first driving element corresponding to one first nozzle belonging to the first nozzle array to eject the liquid from one first nozzle; and supplying a second driving signal having a second waveform to one second driving element corresponding t...