Method and device for supplying ink to a print head

Details Method and device for supplying ink to a print head Method and device for supplying ink to a print head

1995-08-22

1999-03-23

Riley, Shawn

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

B41J 2175

Patent

active

058867210

ABSTRACT:
A main ink chamber with a through-hole contains a capillary member. An intermediate ink chamber is provided on the side wall of the main ink chamber. A path communicatively interconnects the main ink chamber and the intermediate ink chamber. A second meniscus forming member is disposed in a joint port, to thereby prevent ink leakage. In a print mode, ink flows from the main ink chamber to the joint port, through a meniscus forming member that is disposed in the through-hole. Air bubbles mingled into the ink move along the slanting upper wall of the path by their buoyant force, and are accumulatively stored in the upper part of the intermediate ink chamber. When ink is reduced to zero in the main ink chamber, air bubbles are introduced into the intermediate ink chamber through the meniscus forming member. As a result, the liquid level of the intermediate ink chamber is quickly reduced, thereby indicating a state that ink is used up.

REFERENCES:
patent: 4571599 (1986-02-01), Rezanka
patent: 5262802 (1993-11-01), Karita et al.
patent: 5682189 (1997-10-01), Takagi

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