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:
Mar. 06, 2001
Filed:
Mar. 04, 1998
Applicant:
Inventors:
Francesc Subirada, Barcelona, ES;
Francisco Guerrero, Barcelona, ES;
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/9393 ;
U.S. Cl.
CPC ...
B41J 2/9393 ;
Abstract
A calibration technique for a plurality of different color ink printheads which includes printing and scanning a test pattern which incorporates two different calibration adjustments from the same test pattern, with one calibration adjustment at right angles to the scan axis. Further calibration precision is provided by incorporating a controlled color background for the test pattern that minimizes light reflection, as well as basing printhead alignment on the overall swath height of the printheads rather than the centers of the printheads.