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AssigneeKoenig & Bauer Aktiengesellschaft
InventorsArndt Jentzsch, Christian Ziegenbalg, Victor Hefftler, Michael Koch
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A method for operating a printing press, which enables a uniform print quality to be achieved during long periods of operation without replacement of the impression cylinder. The printing press comprises several printing units having impression cylinders and a sheet turning device disposed between the printing units. The circumferential surface of the impression cylinder has an ink-repelling surface. The printing press is used to print sheets, until the ink-repelling surface of the circumferential surface of the impression cylinder has been worn away to an extent that the ink-repelling effect is less than a predetermined threshold value, after which a foil, of which the side facing away from the circumferential surface has an ink-repelling surface, is removably placed on the circumferential surface of the impression cylinder.
A method for operating a printing press, the printing press comprising at least two printing units having impression cylinders and a sheet turning device disposed between the printing units, wherein a circumferential surface of at least one of the impression cylinders is disposed behind the sheet turning device in a sheet running direction has an ink-repelling surface, characterized in that the printing press is used to print sheets until the ink-repelling surface of the circumferential surface has been worn away to such an extent that the ink-repelling effect of the ink-repelling surface is less than a predetermined threshold value, after which, a foil of which a side is averted from the circumferential surface and which has an ink-repelling surface is placed removably on the circumferential surface.
The method of claim 3, characterized in that the structure having an ink-repelling effect is a rough structure.
A method for operating a printing press, the printing press comprising at least one printing unit having an impression cylinder, said impression cylinder having a circumferential surface, said circumferential having an ink-repelling surface, said method comprising the steps of:
Dependencies are inferred from the claim text.