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. 30, 2002
Filed:
Aug. 23, 1999
Gary W. Byers, Vista, CA (US);
Shirley Lee, Poway, CA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A method and apparatus for a test pattern used in the alignment of an ink-jet pen which deposits fixer fluid, or other clear ink precursor fluid, or even colored ink fluid, on print media incorporates a colorless chemical marker in the fixer that is either infrared- or ultraviolet-sensitive and can either be observed using IR-sensitive detectors or visually, respectively, upon application of IR (or near-IR) radiation or UV radiation, respectively. Thus, data may be obtained with respect to deviations in a carriage-scan x-axis and a paper scan y-axis. Thus, the teachings of the present invention permit a determination of the extent of misdirected or missing nozzles.