Laff, Whitesel & Rockman
Ink-on-demand type ink-jet printer with coordinated variable size drops with variable charges
 An ink-jet printer uses droplets of conductive ink to print on a recording medium. The ink is in a chamber having a nozzle and a piezoelectric member attached to one wall of the chamber. The droplets are driven out of the nozzle in response to a driving pulse which is applied to the piezoelectric member. The size of the droplets is determined by the energy content of the driving pulse. The charges formed upon the droplets leaving the nozzle are generated responsive to the driving pulse and have a level which depends upon the driving pulse. 
Nippon Electric Co., Ltd.
B B
B41J B41J
inventional additional
Michihisa Mitsuo
Suga Tsuzuki