On-demand type ink-jet print head having an air flow path

Details On-demand type ink-jet print head having an air flow path On-demand type ink-jet print head having an air flow path

1984-08-29

1987-06-09

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

G01D 1518

Patent

active

046723978

ABSTRACT:
An on-demand type ink-jet printer with a thin cylindrical tip end coaxially projecting into a cylindrical passageway. Ink droplet formation is controlled by a piezoelectric transducer. A stream of air is forced through an annular space formed between the tip end and passageway. The air pressures acting on a meniscus at the tip end is controlled by the position of the tip end within the passageway. A solvent for the ink saturates a porous member surrounding the end of the passageway to control drying of the ink.

REFERENCES:
patent: 1709926 (1929-04-01), Weaver
patent: 4002230 (1977-01-01), Schweppe
patent: 4106032 (1978-08-01), Miura
patent: 4228442 (1980-10-01), Krull
Dollenmayer, W. L., Ink Jet Nozzle Design, IBM TDB, vol. 22, No. 6, Nov. 1979, pp. 2333-2334.

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