Method of operating an ink jet

Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element

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346140R, G01D 1518

Patent

active

045090599

ABSTRACT:
The transducer of a demand ink jet is driven by voltage so as to project a droplet of ink from the orifice of an ink chamber on demand. After the chamber of the jet has been filled, an abrupt change in drive voltage level of the transducer disturbs the meniscus of ink in the orifice of the jet so as to move the meniscus away from the chamber. When the meniscus has reached a predetermined position and velocity in the orifice, the drive voltage level supplied to the transducer is substantially changed so as to eject the droplet from the orifice. The change in drive voltage level is contoured so as to minimize high frequency components. An array of ink jets may be similarly driven where the differences from jet to jet are compensated by wave shaping including variations from jet to jet in the period of time between perturbation and the substantial voltage level change leading to droplet projection.

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IBM Technical Disclosure Bulletin, vol. 15, No. 4, 9/72, "Ink Jet High-Voltage Power Supply" H. E. Naylor and D. L. West, pp. 1371-1372.

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