04672398 is referenced by 282 patents and cites 5 patents.

Disclosed is an ink droplet expelling apparatus for expelling an ink droplet in response to an electric signal, compising a printing head provided with one or more ink chambers, electro-mechanical transducers disposed on the printing head corresponding to the ink chambers, and a driving signal generating circuit for producing electric signals for driving the electro-mechanical transducers. The elector-mechanical transducers are distorted by three different driving signals to reduce the volumes of the ink chambers to raise the pressure therein to thereby expel an ink droplet out of a nozzle formed at the front end of the head. The three driving signals are applied to the electro-mechanical transducers in a predetermined order, the first one giving the ink a velocity, the second one accelerating the ink to expel it in the form of an ink droplet out of the nozzle, the third one acting to suppress the pressure fluctuation in the ink chambers caused by the first and second driving signals as well as to supplement ink in the ink chambers from an ink tank.

Title
Ink droplet expelling apparatus
Application Number
6/793241
Publication Number
4672398
Application Date
October 31, 1985
Publication Date
June 9, 1987
Inventor
Kazuyoshi Tokunaga
Katsuta
JP
Kyoji Mukumoto
Katsuta
JP
Masatoshi Kasahara
Hitachi
JP
Yasumasa Matsuda
Hitachi
JP
Tadashi Kuwabara
Yokohama
JP
Agent
Antonelli Terry & Wands
Assignee
Hitachi Koki
JP
Hitachi
JP
IPC
G01D 15/16
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