Ink jet recording head having means to remove stagnant bubbles

Details Ink jet recording head having means to remove stagnant bubbles Ink jet recording head having means to remove stagnant bubbles

1991-04-25

1992-04-21

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

B41J 218, B41J 219, B41J 205

Patent

active

051072815

ABSTRACT:
An ink jet recording head having a discharge port for discharging ink therethrough comprises a liquid path communicating with the discharge port having a portion in which energy available for discharging the ink acts on the ink, an energy generating member for generating discharge energy, a liquid chamber capable of storing the ink therein and in which the opening portion of the liquid path is provided, and a pair of communication holes for communicating the interior of the liquid chamber with the outside thereof, at least a portion of the ceiling of the liquid chamber is provided at a level higher than the ceiling of the liquid path. Liquid flows in one of the communication holes as a liquid flow inlet and the liquid flows out the other communication hole as a liquid flow outlet. There is provided a guide wall which, when a flow of the liquid is formed between the communication holes, provides a hindrance to the liquid flow rectilinearly linking the communication holes together and guides the flow of the liquid toward the opening portion of the liquid path in the liquid chamber.

REFERENCES:
patent: 4007465 (1977-02-01), Chaudhary
patent: 4380770 (1983-04-01), Maruyama
patent: 4432003 (1984-02-01), Barbero
patent: 4568953 (1986-02-01), Aoki
patent: 4727378 (1988-02-01), Le
patent: 4752787 (1988-06-01), Matsumoto et al.
Janeway, III, D. L., Bubble Scrubbing in an Inkjet Printing Head, IBM TDB, vol. 22, No. 2, Jul. 1979, p. 501-502.

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