Rotary cutting device for material webs

A rotary cutting device for material webs including a machine frame and two rollers, namely a cutting roller and a counter cutting roller, mounted on pivot bearings on the machine frame and being provided with rotary drives, the cutting roller being fitted with at least one curved cutting plate having a sharp cutting edge, the counter cutting roller being fitted with a curved counter plate, the cutting and counter plates defining a cutting range extending between two ends over only a section of the axial length of said rollers, said cutting range being situated substantially in the middle of the cutting and counter cutting rollers, a gap being maintained between the cutting and counter plates for the free passage of the material webs to be cut, said cutting and counter cutting rollers being supported on spacing rings located outside the cutting range so as to be able to roll one directly over the other, wherein the improvement comprises an adjustable pressure roller link bar engaging at least one of said rollers adjacent to each of the two ends of the cutting range between the spacing rings, said pressure roller link bars pressing said at least one roller within the cutting range against the other roller with an adjustable force to adjust the distance between the rollers in the cutting range and to compensate wear of the cutting edge while the material webs are being cut.