Patent ID: 8727473
Filing Date: 2014-05-20
Classification: B41J

Abstract:
1. A method of aligning a printhead comprising: operating a plurality of inkjets in a printhead to eject ink drops to form a plurality of marks on an image receiving member, each inkjet in the plurality of inkjets operating substantially simultaneously; generating image data of the plurality of marks on the image receiving member; identifying with reference to the generated image data a plurality of cross-process direction distances in a cross-process direction between a first mark formed by one inkjet in the plurality of inkjets and each mark formed by one of the other inkjets in the plurality of inkjets; identifying a magnitude of a difference between an angular orientation of the printhead and the cross-process direction with reference to the plurality of identified cross-process direction distances; identifying the magnitude of the difference between the angular orientation of the printhead and the cross-process direction with reference to a difference between the plurality of identified cross-process direction distances, a corresponding plurality of predetermined cross-process direction distances between the one inkjet and each of the other inkjets in the plurality of inkjets, and corresponding plurality of predetermined process direction distances between the one inkjet and each of the other inkjets in the plurality of inkjets; identifying a first rotational direction of the difference between the angular orientation of the printhead and the cross-process direction in response to the plurality of identified cross-process direction distances being greater than the plurality of predetermined cross-process direction distances; and identifying a second rotational direction of the difference between the angular orientation of the printhead and the cross-process direction in response to the plurality of identified cross-process direction distances being less than the plurality of predetermined cross-process direction distances.