Patent ID: 8215855

Claim:
A device for the alignment of sheets in a printing machine, the device comprising: two pairs of rollers for the alignment of sheets in a direction transverse to an advance direction and with respect to a skewed position, whereby each pair of rollers consists of a driving roller having a driving roller running surface and of a counter-pressure roller having a counter pressure roller running surface that is supported in a freely rotatable manner; two drive units, one drive unit for each of the two driving rollers, each of the drive units including a respective motor and a respective drive shaft linked therewith, the driving rollers being non-torsionally accommodated on the respective drive shafts and shiftable in a linear direction on the respective drive shafts; one or more driving roller and counter pressure roller running surfaces having a cam contour extending transverse to the advance direction; and a shifting unit including a drive motor for sliding the driving rollers along the respective drive shafts, the shifting unit adapted to move the two driving rollers in a synchronized manner along the respective drive shafts; wherein the cam contour defines a circular cam having a center located in a plane that bisects the one or more running surfaces in a transverse direction.