Printing machine and method for printing a sheet
AssigneeHeidelberger Druckmaschinen AG
InventorsPeter Hachmann, Andreas Henn
Life of this patent
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Abstract
A printing press for one-sided or two-sided printing of a sheet includes a transfer cylinder disposed in a travel direction of the sheet between a first and a second impression cylinder, respectively, of two printing units, and a sheet support assigned to the transfer cylinder for receiving the sheet thereon before the sheet is transferred to the second impression cylinder, an inverting drum disposed in the travel direction of the sheet between the sheet support and the second impression cylinder, the inverting drum serving for picking up the sheet from the sheet support and transporting the sheet to the second impression cylinder; and a method of operation.
Claims12
A printing press for one-sided or two-sided printing of a sheet, comprising:
- a transfer cylinder disposed in a travel direction of the sheet between a first and a second impression cylinder, respectively, of two printing units;
- and
- a turning device including a sheet support assigned to said transfer cylinder for receiving the sheet thereon before the sheet is transferred to the second impression cylinder, and an inverting drum disposed in a travel direction of the sheet between said sheet support and the second impression cylinder, said inverting drum serving for picking up the sheet from said sheet support and transporting the sheet to the second impression cylinder;
- the sheet being transferred from the first impression cylinder to said transfer cylinder and from said transfer cylinder to the second impression cylinder during a one-sided printing operation;
- the sheet being transferred from said transfer cylinder to said sheet support and from said sheet support to the second impression cylinder through said inverting drum during a turning operation.
A method for two-sided printing of a sheet in a printing press having a transfer cylinder which is disposed in a travel direction of the sheet between a first and a second impression cylinder, respectively, of two printing units, and having a sheet support disposed in the travel direction between the transfer cylinder and the second impression cylinder, the sheet being placed on the sheet support before the sheet is transferred to the second impression cylinder, which comprises assigning an inverting drum to the sheet support;
- moving the sheet on the sheet support from a conveyor system to the inverting drum;
- and having the inverting drum pick up the sheet and guide the sheet to the second impression cylinder.
Dependencies are inferred from the claim text.