Ink jet printer of the ink-on-demand type

Details Ink jet printer of the ink-on-demand type Ink jet printer of the ink-on-demand type

1985-08-12

1986-05-13

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

G01D 1516

Patent

active

045890005

ABSTRACT:
An ink-on-demand type ink jet printer includes an ink jet head assembly having a printer head and an ink container integrally joined to the printer head. The printer head includes a pressure chamber and ink supply and ejection flow passages communicating respectively therewith. The ink container includes therein a narrow air-bubble blocking tube opening directly into a lower portion of the interior of the ink container and which connects the ink supply flow passage to the ink container. A vent hole is defined in an upper portion of the ink container. The ink container includes a wall surface with the wall surface not trapping air bubbles, with a surface of the vent hole being coated with a defoaming agent.

REFERENCES:
patent: 4376283 (1983-03-01), Bower
patent: 4419678 (1983-12-01), Kasugayama
patent: 4463362 (1984-07-01), Thomas

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