US 12,246,531 B2
System and method for using printhead rotation to secure inkjet printing
Stuart A. Schweid, Pittsford, NY (US); David A. VanKouwenberg, Avon, NY (US); Martin L Frachioni, Rochester, NY (US); and Linn C. Hoover, Webster, NY (US)
Assigned to Xerox Corporation, Norwalk, CT (US)
Filed by Xerox Corporation, Norwalk, CT (US)
Filed on Jan. 18, 2023, as Appl. No. 18/156,135.
Prior Publication US 2024/0239115 A1, Jul. 18, 2024
Int. Cl. B41J 11/00 (2006.01); B41J 2/045 (2006.01); B41J 2/21 (2006.01); B41M 3/14 (2006.01); B42D 25/00 (2014.01); B42D 25/30 (2014.01); B42D 25/309 (2014.01)
CPC B41J 11/008 (2013.01) [B41J 2/04505 (2013.01); B41J 2/2114 (2013.01); B41M 3/14 (2013.01); B42D 25/00 (2014.10); B42D 25/30 (2014.10); B42D 25/309 (2014.10)] 22 Claims
OG exemplary drawing
 
1. A method of detecting an original document comprising:
printing a line target in an ink image of the original document on media with at least one printhead that has been rotated so rows of inkjets in the at least one printhead are not aligned in a direction of movement during printing of the line target;
generating an expected frequency response of the line target;
generating image data of a document;
generating a frequency response of the line target in the image data of the document; and
identifying the document as the original document when the frequency response of the line target in the image data of the document equals the expected frequency response of the line target.