Priming apparatus for liquid ink writing instruments

Details Priming apparatus for liquid ink writing instruments Priming apparatus for liquid ink writing instruments

1979-06-28

1980-11-11

Nilson, Robert G.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

417307, F16K 1704

Patent

active

042327024

ABSTRACT:
A system for priming liquid ink writing instruments such as ink jet writers and capillary ink pens is disclosed. A source of ink is pressurized to force ink through the ink jet or other pen so that a small droplet is formed at the jet or pen outlet. As the drop forms at the jet or pen, it is eventually drawn away into an adjacent orifice, due to capillary action. An integrated priming pump serves both to pressurize the ink source to form the ink droplet and to apply a vacuum to the orifice to remove the ink drawn away by capillary action. A pressure release valve ensures that the ink jet or pen is not overpressurized during priming. In ink jet applications, the drop removal orifice is formed as a portion of the droplet charging ring.

REFERENCES:
patent: 1147286 (1915-07-01), Welch
patent: 3455322 (1969-07-01), Chichester
patent: 3548867 (1970-12-01), Grisebach
patent: 3687153 (1972-08-01), Gold

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