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. 22, 2003
Filed:
Jun. 14, 2001
Algird M Gudaitis, Vancouver, WA (US);
Christopher M Lesniak, Vancouver, WA (US);
Stephen A Smith, Ridgefield, WA (US);
Hewlett-Packard Development Co., L.P., Houston, TX (US);
Abstract
Discussed herein is a method of positioning a printer's drive roller relative to the printer's printhead. The printhead has rows of individual print elements arranged to apply transverse dot rows to a print medium. To print at a desired location on the print medium, the printer initiates a first drive roller advance to the desired location, at a relatively fast slew speed. Assuming some overshoot or undershoot occurs, the printer then determines the actual position error of the drive roller, and selects a set of the printhead rows that correspond most closely in position to the desired print location. The printer then initiates a second drive roller advance, at a relatively slow speed, to position the selected group of printhead rows accurately over the desired print location on the print medium. These printhead rows are then used to perform the actual printing. The slow speed of the second drive roller advance ensures high positioning accuracy. However, the distance of this advance is limited because of selecting the closest set of printhead rows. This decreased distance decreases the overall time consumed by drive roller advances.