Patent ID: 7594461

Claim:
A rotary cutting device, comprising: a rotatably mounted cutting roller; an anvil roller; at least one support ring for supporting the cutting roller on the anvil roller; a lifting device for moving the cutting roller and the anvil roller apart with a translatory motion in order to separate the at least one support ring and the anvil roller, the translatory motion comprising a movement without any rotational component that is in a direction transverse to an axis of rotation of the cutting roller and transverse to an axis of rotation of the anvil roller; a drive control system for the rotary cutting device; and a lifting device control system electronically coupled to the drive control system for the rotary cutting device; wherein: the lifting device is adapted to be activated in a controlled manner for the moving of the cutting roller and the anvil roller apart with said translatory motion; and the lifting device is adapted to be activated upon at least one of exceeding and falling below a threshold value for at least one of speed, acceleration and deceleration of at least one of the cutting roller and the anvil roller.