Abstract: A transfer drum in a sheet-fed printing press having a support surface formed at least segmentally of individual punctiform support elements disposed on the circumference of the transfer drum includes another support surface disposed at least segmentally on the circumference of the transfer drum, the other support surface being continuous, both of the support surfaces being mutually interchangeable.

Abstract: A device for adjusting guide yokes in rotary printing machines which are placed on a crossbeam crosswise to the direction in which the sheets travel, and which guide the sheets that are transported by a cylinder; each of the guide yokes are mounted, movable and lockable, on the crossbeam, and the crossbeam is at both ends fastened to the machine side racks.

Abstract: A sheet guiding device for printing presses, wherein, for recto printing, a sheet decurler is pivotable into a gap formed in a guide surface and, for recto/verso printing, the sheet decurler is pivotable out of the gap, a surface element of the guide surface being displaceable for closing the gap wherein the sheet decurler is engageable, includes a drive lever which, for switching to recto printing, is operatable for displacing the surface element in order to form the gap and for engaging the sheet decurler and pivoting it into the gap, the drive lever, for switching to recto/verso printing, being operatable for releasing the sheet decurler to swivel out of the gap and for engaging and displacing the surface element.