Patent ID: 7073883
Filing Date: 2006-07-11
Classification: B41J

Abstract:
1. A calibration method of aligning the printing of dots by different nozzle banks of an ink jet printer apparatus, the method comprising the steps of: (a) printing on a receiver medium a sequence of spaced discrete first dots from one nozzle bank having plural nozzles associated therewith, the first dots being printed in a predetermined pattern; (b) printing on the receiver medium a sequence of spaced discrete second dots from a second nozzle bank having plural nozzles associated therewith, at least some of the second dots being printed within the pattern; (c) generating through examination of the receiver medium or a reproduction thereof information regarding the dots printed on the receiver medium; (d) using the information to identify locations of the second dots; (e) determining placement errors for the at least some of the second dots; and (f) adjusting alignment of the second nozzle bank in accordance with any errors determined in placement wherein in step (c) the receiver medium is scanned at a resolution of at least five times the diameter of the smallest dot printed thereon.