| 摘要 |
PROBLEM TO BE SOLVED: To optionally set tension of a sheet between each pressure drum for printing and each roller of the sheet travelling between the pressure drum for printing and a roller of a processing part. SOLUTION: Tension detectors 7a-7f to detect tension of a sheet at each position are arranged on the upstream side of pressure drums 4a-4c for printing of a printing part and on the upstream side of tension rollers 6a-6c of a processing part, a shift adjusting means capable of adjusting respective rotational speed in accordance with output signals from controllers 12a-12f is provided in each of drive systems of parts where at least these tension detectors 7a-7f are arranged, a detection value of each of the tension detectors is fed back to each of the controllers, tension setters 14a-14f are provided on each of these controllers, and signals to control rotational speed of the pressure drums for printing and the tension rollers are output from the controllers so that rotational speed comes to be the one at which a compared value comes to be zero by comparing the detected values from each of the tension detectors 7a-7f and set values by the setters with each other. |
