US 6,983,218 B2
Media skew compensation in printer device
Pascal Ruiz, Barcelona (Spain); David Toussaint, Barcelona (Spain); and Marc Serra, Barcelona (Spain)
Assigned to Hewlett-Packard Development Company, L.P., Houston, Tex. (US)
Filed on Oct. 20, 2003, as Appl. No. 10/687,843.
Claims priority of application No. 02023824 (EP), filed on Oct. 23, 2002.
Prior Publication US 2004/0130708 A1, Jul. 08, 2004
Int. Cl. G01B 1/00 (2006.01)
U.S. Cl. 702—151 14 Claims
OG exemplary drawing
 
1. A method of determining an angle between a first direction of movement of a print head and a second direction of movement of a print media which is skewed with respect to a predetermined intended direction of movement of the print media, said method comprising:
printing an array of markings on said print media, said array of markings extending along said first direction and along said second direction;
traversing a sensor device along said first direction, and detecting a signal corresponding to said plurality of markings;
identifying a plurality of peaks in said sensor signal as a plurality of two-dimensional data co-ordinates; and
obtaining angle data representing an angle between said plurality of two-dimensional data co-ordinates and a reference data and which is indicative of skew between the second direction of movement with respect to the predetermined intended direction of movement.