ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,466,181, issued on Nov. 11, was assigned to RISO Technologies Corp. (Tokyo).
"Ink jet head" was invented by Ryutaro Kusunoki (Mishima Shizuoka, Japan) and Noboru Nitta (Tagata Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "According to one embodiment, an ink jet head includes a piezoelectric member to drive a pressure chamber, an electrode pair to apply a voltage to the piezoelectric member, and a common waveform generation circuit to generate a common waveform. The common waveform alternately includes an element of a first output waveform and an element of a second output waveform at a predetermined period. A switch is connected between...