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:
Apr. 25, 2006
Filed:
Aug. 31, 2001
Ranjit Bhaskar, Portland, OR (US);
Jay S Gondek, Camas, WA (US);
Thomas G Berge, Camas, WA (US);
Jefferson P Ward, Brush Prairie, WA (US);
Ranjit Bhaskar, Portland, OR (US);
Jay S Gondek, Camas, WA (US);
Thomas G Berge, Camas, WA (US);
Jefferson P Ward, Brush Prairie, WA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A test page produced by ink pens for calibrating drop weights for at least a first and a second printheads, comprising: a page with an area for color swatches; a plurality of color swatches disposed in the area; and a predetermined substantially uniform color background disposed in said area between and around said plurality of color swatches. In a system embodiment of the present invention, a sensor may be used for sensing spectral data for each color swatch in a plurality of color swatches; and a component may be provided for comparing the sensed spectral data for each color swatch in a plurality of the color swatches to spectral data for the background color and selecting one of the plurality of color swatches which has spectral data which is closest to the background color for use in adjusting ink volume for at least one of the ink pens.