Fluid droplet ejecting system

Details Fluid droplet ejecting system Fluid droplet ejecting system

1984-02-06

1986-03-18

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

310317, 310332, G01D 1516

Patent

active

045772010

ABSTRACT:
In an on-demand type ink-jet recording apparatus, which includes an ink chamber and a polarized piezoelectric element coupled to the ink chamber, the piezoelectric element being polarized as a result of application of a voltage of given polarity thereacross, ink droplets are ejected by applying droplet-ejecting pulses of opposite polarity to that used in polarization of the piezoelectric element for ejecting ink droplets from the nozzle for recording on a recording medium. In order to prevent loss of polarization of the piezoelectric element due to the application of the droplet-ejecting pulses, additional polarization-loss-preventing pulses of opposite polarity (same polarity as that used in polarization treatment of the piezoelectric element) are applied at predetermined points of time to the piezoelectric element to prevent loss of polarization thereof.

REFERENCES:
patent: 4237399 (1980-12-01), Sakamoto
patent: 4284996 (1981-08-01), Greve
patent: 4385304 (1983-05-01), Sniderman
patent: 4459601 (1984-07-01), Howkins
patent: 4471363 (1984-09-01), Hanaoka

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