Electrostatic ink ejection printing head

Details Electrostatic ink ejection printing head Electrostatic ink ejection printing head

1977-10-25

1979-08-28

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

101 1, 101DIG13, G01D 1516

Patent

active

041662776

ABSTRACT:
An electrostatic ink ejection printing head uses an ink reservoir having small holes in its wall, the ink retained within the holes by surface tension. An electrostatic field is produced at each hole, as required, to overcome the surface tension and cause the ink to move into contact with a paper sheet to produce a dot. The holes can be in any desired predetermined formation. An electrode can be positioned opposite each hole, the paper between electrode and hole, or an electrode can be formed around or on either side of each hole. The electrodes are pulsed as necessary.

REFERENCES:
patent: 2143376 (1939-01-01), Hansell
patent: 3177800 (1965-04-01), Welsh
patent: 3452360 (1969-06-01), Williamson
patent: 3553719 (1971-01-01), Miyazaki
patent: 3666966 (1972-05-01), Buss
patent: 3834301 (1974-09-01), Croquelois
patent: 3887928 (1975-06-01), Ohno

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