Ink jet printhead with ink flow directing valves

Details Ink jet printhead with ink flow directing valves Ink jet printhead with ink flow directing valves

1992-05-28

1994-01-11

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

B41J 205, B41J 2055

Patent

active

052785858

ABSTRACT:
A thermal ink jet printhead has a flow directing one-way valve for reducing back-flow directed forces generated by the droplet ejecting ink vapor bubbles, so that most of the bubble generated forces are used to eject ink droplets from the printhead nozzles. The one-way valve is provided by patterning the etch resistant mask to form a flap located at a predetermined position along the ink channels between the heating elements and reservoirs, which is activated by bubble generated forces directed in the opposite direction from the printhead nozzles.

REFERENCES:
patent: 4463359 (1984-07-01), Ayata et al.
patent: 4496960 (1985-01-01), Fischbeck
patent: 4752788 (1988-06-01), Yasuhara
patent: 4774530 (1988-09-01), Hawkins
patent: 5053787 (1991-10-01), Terasawa
patent: 5072241 (1991-10-01), Shibaike et al.
Hawkins et al; Sideshooter with High Frequency Response; Xerox Disclosure Journal, V14, N3, May/Jun. 1989, pp. 105-107.

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