Method and apparatus for driving an ink jet printer head

Details Method and apparatus for driving an ink jet printer head Method and apparatus for driving an ink jet printer head

1981-08-25

1984-09-11

Miller, Jr., George H.

Recorders

Markers and/or driving means therefor

With ink supply to marker

G01D 1518

Patent

active

044713630

ABSTRACT:
In the demand-type ink jet printer head driving method and apparatus a predetermined voltage is applied to an electromechanical conversion device in a preliminary step to displace the wall of an ink pressure chamber inwardly. This decreases the volume of the pressure chamber without ejecting ink from the nozzle. The applied voltage is removed to restore the wall of the pressure chamber by means of the elastic energy stored in the wall and in the electro-mechanical conversion means thereby drawing ink into the pressure chamber from an ink reservoir container. Voltage is applied a second time to the electro-mechanical conversion device in synchronism with a damped oscillation system comprised of the pressure chamber wall, the electro-mechanical conversion means, and ink. The second application of voltage in synchronism with the damped oscillation displaces the electro-mechanical conversion means inwardly so that an ink droplet is ejected from the nozzle.

REFERENCES:
patent: 3946398 (1976-03-01), Kyser et al.
patent: 4005435 (1977-01-01), Lundquist et al.
patent: 4161670 (1979-07-01), Kern
patent: 4245224 (1981-01-01), Isayama et al.
patent: 4266232 (1981-05-01), Juliana Jr. et al.
patent: 4282535 (1981-08-01), Kern et al.
patent: 4290074 (1981-09-01), Royer
patent: 4323908 (1982-04-01), Lee et al.
patent: 4339763 (1982-07-01), Kyser et al.

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