Ink barrier for fluid reservoir vacuum or pressure line

Details Ink barrier for fluid reservoir vacuum or pressure line Ink barrier for fluid reservoir vacuum or pressure line

1996-04-29

1999-07-06

Le, N.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

B41J 2175

Patent

active

059203323

ABSTRACT:
In the particular embodiment described in the specification, an ink jet printhead has a linear array of orifices and is adapted to be mounted in three mutually orthogonal orientations to eject ink drops from the orifices in horizontal or vertical directions. The printhead includes a reservoir for supplying ink to the orifices and the outlet from the reservoir is positioned below the level of ink in the reservoir in each of the orientations of the ink jet printhead. A reservoir vent is located above the level of the ink in each of the reservoir orientations and a U-shaped tube within the reservoir has one end connected to the vent and another end which is open to the interior of the reservoir at a location which is above the level of the ink in each of the reservoir orientations. The U-shaped tube extends downwardly along one wall of the reservoir and along the bottom of the reservoir so that at least a portion of the U-shaped tube is disposed below the minimum level of the ink in the reservoir in each of the reservoir orientations.

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