Laff, Whitesel, Conte & Saret
Ink-on-demand type ink-jet printer
 A demand ink-jet printer uses droplets of conductive ink for recording on a recording medium. In greater detail, an ink chamber, filled with conductive ink, has a nozzle in one wall and a piezoelectric member attached to another wall. Droplets of ink are driven out the nozzle in response to a driving pulse applied to the piezoelectric member. The energy content of the driving pulses controls both the size of the droplets and the potential of a charging voltage applied to the droplets. This way, the combined charge and size may be held constant so that large or small drops may be generated to produce half-tone pictures and the droplets may be electrostatically deflected accurately, despite the variance in droplet size. 
Nippon Electric Co., Ltd.
B B
B41J B41J
additional inventional
Mitsuo Michihisa
Tsuzuki Suga