DEVICE FOR REGISTER CONTROLLING OF MULTICOLOR ROTARY PRINTING MACHINES

摘要

The apparatus is suitable for controlling the displacement of colours, for preadjusting the register and for eliminating waste paper. To preadjust the register, the impression cylinders are set as a function of a quotient K which is calculated from the length of the web of paper between two printing units and from the circumference of the impression cylinders. Said quotient K is taken into consideration both in the automatic control of the image displacement and in the elimination of faulty printed products.