Patent ID: 9022500
Filing Date: 2015-05-05
Classification: B41J

Abstract:
1. A printing system for printing a duplex image having a first side image and a second side image on a continuous web of recording media moving in a downstream direction along a web path from a first roller to a second roller comprising: a printhead disposed adjacent to the continuous web of recording media, the printhead including a plurality of nozzles configured to eject ink on the recording media; a first velocity sensor configured to generate a first velocity signal representative of the velocity of the web at the first roller and a second velocity signal representative of a change in velocity of the web at the first roller; a second velocity sensor configured to generate a second velocity signal representative of the velocity of the web at the second roller; a controller operatively connected to the printhead, to the first velocity sensor and to the second velocity sensor, the controller being configured to generate a time stamp signal representative of the time of the change in the first velocity signal and to adjust the timing of the ejection of ink based upon the change in the first velocity signal, the second velocity signal, and the time stamp signal.