Perforated membranes for liquid contronlin acoustic ink printing

Details Perforated membranes for liquid contronlin acoustic ink printing Perforated membranes for liquid contronlin acoustic ink printing

1989-05-30

1991-07-02

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

B41J 2045, B41J 2175

Patent

active

050289373

ABSTRACT:
In accordance with the present invention, an acoustic ink printer comprises a pool of liquid ink having a free surface in intimate contact with the inner face of a perforated membrane. The printer addresses all pixel positions within its image field via substantially uniform, relatively large diameter apertures which extend through the membrane on centers that are aligned with respective ones of the pixel positions. In operation, one or more focused acoustic beams selectively eject individual droplets of ink from the ink menisci that extend across the apertures. Accordingly, the membrane is positioned and the bias pressure that is applied to the ink is selected so that the menisci essentially remain within the focal plane of such beam or beams.

REFERENCES:
patent: 3211088 (1965-10-01), Naiman
patent: 4308547 (1981-12-01), Lovelady
patent: 4719476 (1988-01-01), Elrod
patent: 4751529 (1988-06-01), Elrod
patent: 4801953 (1989-01-01), Quate

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