Patent ID: 9277100
Filing Date: 2016-03-01
CPC Classification: H04N

Claim Text:
1. A method to control a printer or copier by regulating a color value of a print color, comprising the steps of: providing a print marking and a separate non-overlapping positioning marking associated with the print marking on a printing substrate web aligned with each other along a movement direction of the substrate web; providing a color measurement unit having a measurement region for determining a color value of the print marking and also with said same color measurement unit a color value of said positioning marking; with the web moving in a said movement direction, measuring the color value of the print marking and also measuring the color value of the positioning marking and by use of the positioning marking color value determining whether an undesirable lateral positioning of the printing substrate web has occurred in a lateral direction transverse to the movement direction such that the measurement region of the color measurement unit no longer lies entirely within the print marking; if such an undesirable lateral movement has occurred at least one of re-establishing a desired alignment between the color measurement unit and the substrate web in the movement direction, compensating the determined color measurement value of the print marking for an error produced by the undesired lateral positioning, and not using the color measurement value of the print marking at all; and controlling the printer or copier while the web is moving to regulate the color value of the print color depending on the measurement color value of the print marking if at least one of the color measurement value and the compensated measurement value of the print marking is used.