Verfahren und Vorrichtung zur Anpassung der Lage von Druckplatten an die Verformung des zu bedruckenden Papieres

摘要

In a process and a device for adapting the position of printing plates (4) to the deformation (fan-out) of the paper web (2) to be printed through damp, ink absorption and mechanicl stress on passing between several successive pairs of pressure rollers (1) and also for adaptation to deformations possibly occurring in the fixing device of a pressure roller (1) and resultant changes in the position of a printing plate (4), the printing plate (4) or the support holding it in the stamping or bending machine (5) is moved or shifted laterally, peripherically and/or angularly by the amount required for said printing plate (4) on the pressure roller (1) as a function to said deformation of the paper web (2) to be printed, in order to obtain a corresponding pressure with a pressure roller (1) upstream of the paper web to be printed despite the paper deformation that has meanwhile occurred. Thereafter the deformations, i.e. bends and/or stamping (7) are applied to said printing plate (4) moved from its zero position. For this purpose in particular a computer-controlled positioning device (17) is used in the printing and/or stamping machine (5) after the corresponding data on the paper web, the printing machine and the type of production have been fed into the computer.