Patent ID: 6795683
Filing Date: 2004-09-21
Classification: G03G

Abstract:
A tandem type printing system, comprising:a first print device including a first printing means for forming a first-surface image on a first surface of a web; a second print device including a second printing means for forming a second-surface image on a second surface of the web, a transport means for transporting the web, and a control means for controlling the transport means; and a communication means for communicating with the first print device and the second print device, wherein: at least the first print device includes a mark forming means for forming position-alignment marks on predetermined positions on the first surface of the web; the communication means transfers mark information on the position-alignment marks formed on the first surface to the control means of the second print device; at least the second print device includes a detection means for detecting the position-alignment marks formed on the first surface; and the control means controls, based on the mark information and detection results from the detection means, the transport means to transport the web so as to match a positional phase of the second-surface image with a positional phase of the first-surface image.