US Patent Issued to RISO Technologies on July 14 for "Liquid ejection head" (Japanese Inventor)

ALEXANDRIA, Va., July 14 -- United States Patent no. 12,679,086, issued on July 14, was assigned to RISO Technologies Corp. (Tokyo).

"Liquid ejection head" was invented by Yasuhito Kiji (Mishima Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "In an embodiment, a liquid ejection head includes a nozzle plate, a pressure chamber, an actuator, and a drive circuit. The actuator varies a volume of the pressure chamber in response to a driving signal from the drive circuit. The driving signal includes an ejection waveform for ejecting liquid from a nozzle and a cancellation waveform for suppressing residual oscillation after ejection of the liquid. The ejection waveform includes voltage changes in st...