Abstract: A device including a receiving device for a stack formed by sheets of stock material that move by gravity along the receiving device toward a marker and which includes positioning elements for positioning a sheet to be marked with respect to the marker, and which also includes an ejector for the marked sheets. The marker is arranged under the receiving device and it is used to mark the underside of each bottom sheet of the stack.

Abstract: A printing press includes an interchangeable plate cylinder, in which the plate cylinder may have variable cutoff diameters. The plate cylinder is mounted in the printing press in rolling contact with a fixed diameter blanket cylinder. The ink rollers of the inker mechanism may be positionally adjusted to accommodate a plate cylinder of various diameters. The surface of the printing blanket which is mounted on the blanket cylinder includes a material of low polarity surface energy, such as PTFE. The ink used in the press is selected such that, in combination with the PTFE of the blanket surface, the ink does not remain as a latent image on the blanket cylinder after transfer of the image from the blanket cylinder to a web of material.