Abstract: The invention relates to a printing machine, preferably a rotation printing machine, with at least one guide roller (14), which is mounted between two side frames (7, 8). A printing substrate can be guided via the guide roller and at least one print roller can be placed on the guide roller. The printing machine has at least one blast air unit (2) that is arranged in the rotation direction of the guide roller (14) behind the print roller. The blast air unit (2) blows out blast air on the substrate that can be inserted into and removed from its working position. The blast air unit (2) comprises inlet and outlet openings (29, 30) that can be connected to frame-fixed air inlets (10) and air vents (11) wherein the air inlets (10) and the air vents (11) and/or the inlet and outlet openings (29, 30) are bordered by sealings (26, 28). The printing machine is characterized in that, the blast air unit (2) can be moved during the insertion process in two directions that are independent of one another.

Abstract: In a device for coupling a winding shaft pin with a drive shaft pin, the latter is provided with a radial recess, in which the winding shaft pin is held by a latching means in such a manner as to prevent relative rotation. In order to ensure centered running of the winding shaft pin even after prolonged use a self-aligning bearing (4) is mounted on the winding shaft pin, whose outer ring and is adapted to pivot about a transverse axis in relation to the inner ring and is able to be held and latched in the radial recess (14). The winding shaft pin (3) is connected with the drive shaft pin (12) at the end for transmission of the torque.