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:
May. 16, 2006
Filed:
Feb. 20, 2002
David Golman King, Lexington, KY (US);
Patrick Laurence Kroger, Versailles, KY (US);
David Golman King, Lexington, KY (US);
Patrick Laurence Kroger, Versailles, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
A printhead alignment test pattern has spaced-apart images at least partially aligned along an axis. Each image includes leading and trailing edge portions having respective image-outermost leading and trailing edges spaced apart along the axis and includes an intervening portion located between the leading and trailing edge portions. The leading and trailing edge portions have a higher print density than the intervening portion. A method for determining a printhead misalignment of a printer prints the test pattern, moves a sensor along the axis over the images, obtains data from the sensor, determines the locations along the printhead scan axis of the leading and/or trailing edges of the images using the data, and calculates the printhead misalignment from the determined locations of the leading and/or trailing edges of the images. The test pattern reduces cockling of the print media which improves the accuracy of the method.