Apparatus and method for ejecting ink droplets

Details Apparatus and method for ejecting ink droplets Apparatus and method for ejecting ink droplets

1984-11-19

1987-12-29

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346140R, G01D 1516

Patent

active

047164182

ABSTRACT:
Apparatus for the ejection of ink droplets having a fluid filled channel having a discharge opening at one end, and a cross-sectional expansion at the other, so that pressure waves within the channel produce by a tubular transducer are reflected from the cross-sectional expansion with reversal of operational sign or polarity. Unipolar pulses having symmetrically and trailing edges excite the transducer, and the droplet is ejected from the discharge opening as a result of the superimposed directed and reflected pressure waves produced by the transducer.

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Bogy et al.; Experimental and Theoretical Study of Wave Propagation Phenomena in Drop-On-Demand Ink Jet Devices, IBM J. Res. Develop., vol. 28, No. 3, May 1984, pp. 314-321.
Kyser et al.; Design of an Impulse Ink Jet, Journal of Applied Photographic Engr., vol. 7, No. 3, Jun. 1981, pp. 73-79.

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