Abstract: The invention relates to a device for the aligning of printing plates (78) on a printing plate cylinder (10) for a rotary printing press. At least one bore (16) extends through the printing plate cylinder (10) in an axial direction. A movable actuating shaft (26) is disposed in the bore (16). Located in the shaft (26) are a plurality of ring-shaped tensioning and adjustment elements which are spaced apart from one another. The adjustment elements (36) have movable aligning elements/register pins (56) arranged thereon. The invention is characterized in that, for at least one adjustment element (36), an eccentric pin (21) extends between the adjustment element (15) and the register pin (19). The eccentric pin (21) is rotatable to move the register pin (19) along the adjustment element (15).

Abstract: The invention relates to an actuating device for clamping arrangements for printing plates in rotary printing presses. The printing unit cylinders receiving the printing plates are provided with at least one opening extending in the axial direction. Through actuating means fastened to the ends of the printing unit cylinder the printing plates can be tightened on the surface of the printing unit cylinder. The actuating means are operable by an actuating unit provided at one end of the printing unit cylinder. The invention is characterized in that the actuating unit (32) includes an overrunning clutch (30) which determines the rotational position of an actuating shaft (9), the actuating unit being spring-biased and comprising an axially movable component (27).