| 摘要 |
A method for measuring and regulating the elongation of a moving material web (2) comprises measuring the length change or speed change occurring over a drive roller (3), from which the elongation is calculated and, if it deviates from the desired elongation, the web tension is corrected in order to set the elongation. Such a method is preferably used in a web tension device disposed between a roll exchanger and a printing press. The web tension is preferably adjusted by means of a dancer roller (14), whose force exerted on the material web (2) is regulated by a controlled dancer cylinder (13). <IMAGE> |
