The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 06, 1999
Filed:
Apr. 29, 1996
Jeffrey B Brooks, Keene, NH (US);
Markem Corporation, Keene, NH (US);
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.