Inking unit
AssigneeHeidelberger Druckmaschinen AG
InventorGotthard Schmid
Life of this patent
Estimating the term…
Abstract
An inking unit for a printing machine, which includes at least one ink roller rolling on a plate cylinder of the printing machine, an ink jet printing apparatus with a plurality of ink jets that can be controlled selectively, and an ink transfer device with a rotating mantle surface for transferring printing ink from the ink jet printing apparatus to the at least one ink roller. A compact and stencil-free inking unit for high-quality printing is achieved and the at least one ink roller and the ink transfer device, and have the same outside circumference as the plate cylinder.
Claims12
An inking unit for a printing machine, comprising:
- at least one ink application roller rolling on a plate cylinder of the printing machine;
- an ink jet printing apparatus with a plurality of ink jets that are selectively controllable;
- and
- an ink transfer device with a rotating mantle surface for transferring printing ink from the ink jet printing apparatus to the at least one ink roller, wherein the at least one ink roller and the ink transfer device have an outside circumference substantially equal to an outside circumference of the plate cylinder;
- wherein at least one of the plurality of ink jets is arranged behind another one of the plurality of ink jets.
An inking unit for a printing machine, comprising:
- at least one ink application roller rolling on a plate cylinder of the printing machine;
- an ink jet printing apparatus with a plurality of ink jets that are selectively controllable;
- an ink transfer device with a rotating mantle surface for transferring printing ink from the ink jet printing apparatus to the at least one ink roller, wherein the at least one ink roller and the ink transfer device have an outside circumference substantially equal to an outside circumference of the plate cylinder, and wherein the printing machine is an offset printing machine, and a raster distance between the ink jets is less than an image resolution of the offset printing machine;
- a plate imaging unit, wherein raster data used for the plate imaging unit before printing operation is also used during repeated cycles of printing operation to control the ink jet printing apparatus;
- and
- a device to reduce image resolution, adapted to use the raster data to produce corresponding degraded raster data with a lesser image resolution to control the ink jet printing apparatus.
Dependencies are inferred from the claim text.