Patent ID: 8136907
Filing Date: 2012-03-20
Classification: B41J

Abstract:
1. A method that compensates for thermally induced diameter changes in a roller of a moving web printing system comprising: receiving a signal from a first encoder corresponding to an angular velocity of a first roller in a print zone of a moving web printing system; receiving a signal from a first temperature sensor corresponding to a temperature of the first roller in the print zone of the moving web printing system; modifying a first diameter stored for the first roller with a first predetermined distance in response to the temperature of the first roller being different than a first predetermined temperature; identifying a velocity of a moving web in the print zone of the moving web printing system with reference to the modified first diameter; and delivering a firing signal to a first printhead proximate the first roller to energize the inkjet nozzles in the first printhead and eject ink onto the web at a position corresponding to the identified moving web velocity.