Patent ID: 9193192
Filing Date: 2015-11-24
Classification: B41J

Abstract:
1. A method for using tension control adjustments on a web to reduce registration errors when printing a print job on the web, comprising: providing a printing system with a first print station disposed opposite a first side of the web, wherein the first print station defines one or more print zones where a liquid is deposited onto the first side of the web, and a plurality of first rollers adapted to receive tension control commands; defining a plurality of tension zones in the printing system, wherein tension on the web in one tension zone is controlled independently of the tension on the web in the other tension zones; for each tension zone, associating at least one of the plurality of first rollers with the tension zone, the tension control commands operating on the first roller to control the amount of tension of the web in the tension zone; using the printing system to print a first copy of the print job on the web; determining a plurality of registration errors produced during the printing of the first copy of the print job; using a processor to determine first tension control adjustments for each tension zone in the printing system based on the plurality of registration errors; and using the first tension control adjustments to adjust the tension control commands to the first rollers of each of the tension zones in the printing system to print a second copy of the print job, thereby reducing registration errors.