| 摘要 |
A method of controlling the tension of webs in a rotary press, in which the printing is done on the webs, which are fed from a plurality of paper feed units, by printing means provided correspondingly to the webs, to then laminate the webs, fold the webs with a triangular plate and send the resultant webs to a subsequent step, consisting of the steps of detecting at an outlet section of each printing means the tension of the relative web which is transferred from an inlet section thereof to the outlet section via the printing means, computing the predetermined tension of the web at the inlet section of the printing means on the basis of the value detected at the outlet section of the printing means, regulating the tension of the web at the inlet section of each printing means on the basis of the result of the computation, and thereby regulating the tension of each web before the triangular plate to a constant level; and an apparatus for practicing this method. The level of the tension imparted to all the webs is also regulated by a pressing means. |
