Sheet-fed printing machine

Abstract

A sheet-fed printing machine includes an anilox inking unit having a screen roller and an ink applicator roller, as well as a dampening unit having a dampener applicator roller. The ink applicator roller has an outside diameter which is more than twice as large as the outside diameter of the dampener applicator roller.

Description

BRIEF DESCRIPTION OF THE DRAWING

The FIGURE of the drawing is a diagrammatic, cross-sectional view of a printing unit having an anilox inking unit and, for wet offset printing, a dampening unit.

Claims

1. A sheet-fed printing machine, comprising: an anilox inking unit including a screen roller and an ink applicator roller, said ink applicator roller having an outside diameter; anda dampening unit including a dampener applicator roller having an outside diameter;said outside diameter of said ink applicator roller being more than twice as large as said outside diameter of said dampener applicator roller.

2. The sheet-fed printing machine according to claim 1, wherein said respective outside diameters of said ink applicator roller and said dampener applicator roller are in a ratio of at least 10:4.

3. The sheet-fed printing machine according to claim 1, which further comprises a bridge roller bearing against said dampener applicator roller and against said ink applicator roller in a cleaning mode.

4. The sheet-fed printing machine according to claim 3, wherein said bridge roller has an outside diameter, and said outside diameter of said ink applicator roller is more than twice as large as said outside diameter of said bridge roller.

5. The sheet-fed printing machine according to claim 4, wherein said outside diameter of said ink applicator roller and said outside diameter of said bridge roller are in a ratio of at least 10:4.

6. The sheet-fed printing machine according to claim 1, which further comprises a device selected from the group consisting of a jet device and a spray device for introducing a washing agent directed onto said dampening unit.

7. The sheet-fed printing machine according to claim 6, which further comprises a dampening unit roller bearing only against said dampener applicator roller, said device selected from the group consisting of a jet device and a spray device being directed onto at least one of said dampener applicator roller and said dampening unit roller bearing only against said dampener applicator roller.

8. The sheet-fed printing machine according to claim 1, which further comprises at least one inking unit roller, and a cleaning doctor blade coupled to said screen roller through said at least one inking unit roller in a cleaning mode.

9. The sheet-fed printing machine according to claim 1, wherein said ink applicator roller is formed with a cylinder channel provided with a tensioning device for mounting a rubber blanket in tension on said ink applicator roller.

10. The sheet-fed printing machine according to claim 1, which further comprises a printing form cylinder having an outside diameter being identical to said outside diameter of said ink applicator roller.