Device for shifting a compensator roller in a printing press

Claim 1

In a rotary printing press including a plurality of sprocket wheels and a plurality of rollers, chains traveling over said sprocket wheels and said rollers and carrying spaced cross rods for engaging an end of a paper web to pull the paper web over a number of said rollers, a compensator roller located below two of said sprocket wheels and vertically movable relative to said sprocket wheels and said rollers to correct out-of-register conditions of a paper web passing over a number of said rollers and means for moving said compensator roller in the vertical direction toward and away from said two sprocket wheels, the improvement comprising a controllable actuator assembly for selectively moving said compensator roller in the vertical direction at a high speed and at a relatively lower speed operatively connected to said means for moving said compensator roller in the vertical direction, said actuator assembly including a first means for moving said compensator roller at a high speed during paper web introduction, a second means for moving said compensator roller at a relatively lower speed into the proper compensation position after the paper web has been introduced and gear means selectively connecting said first means and said second means in driving relation with said means for moving said compensator roller in a vertical direction, whereby the position of the compensator roller prevents a paper web from falling into uneven loops after passing over said compensator roller during introduction.