Patent ID: 6763220
Filing Date: 2004-07-13
Classification: G03G

Abstract:
A printing system comprising:a first printing unit that prints images on a first surface of a web, the first printing unit including a mark forming unit that forms a positioning mark at a predetermined position of the web; and a second printing unit that prints images on a second surface of the web opposite from the first surface, wherein at least the second printing unit includes: a mark detection means for detecting the positioning mark formed by the mark forming unit and outputting a mark detection signal accordingly; a calculation means for calculating an appropriate transport speed of the web based on an output timing of the mark detection signal; a memory means for storing a first information on the transport speed of the web calculated by the calculation means; and a control means for controlling a transport speed of the web based on the first information stored in the memory means at least for a period until the mark detection means detects the positioning mark for a first time after a printing operation was started.