Ink jet printing employing reverse charge coupling

Details Ink jet printing employing reverse charge coupling Ink jet printing employing reverse charge coupling

1980-08-15

1982-03-09

Hix, L. T.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 75, G01D 1518

Patent

active

043192513

ABSTRACT:
A method and apparatus for ink jet printing are disclosed which employ reverse charge coupling to increase character height. A video signal is utilized to modulate the charge ring voltage. Via a parallel path the ink in the nozzle is reversely charged by the video signal. Thus, as the ink drops are formed their electrical charge is greater than can be obtained under ordinary circumstances. This permits greater deflection of the drops resulting in larger characters on the printing media at the normal distance between media and nozzle or higher quality characters of the same size if the media is moved closer to the nozzle.

REFERENCES:
patent: 3060429 (1962-10-01), Winston
patent: 3579245 (1971-05-01), Berry
patent: 3596275 (1971-07-01), Sweet
patent: 3827057 (1974-07-01), Bischoff et al.
patent: 3916421 (1975-10-01), Hertz
patent: 3972474 (1976-08-01), Keur
Scientific American, Apr., 1979, "Ink Jet Printing", Kuhn and Myers, pp. 162-178.
A. B. Dick Company Model 9600 Product Manual, pp. 3-1 to 3-5.

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