Printing press

Abstract

A printing press includes a form cylinder, a blanket cylinder, an impression cylinder, an adjusting apparatus having at least one first actuating drive for setting a printing pressure between the blanket cylinder and the impression cylinder, and a tracking system for setting a printing pressure between the form cylinder and the blanket cylinder in dependence on the setting of the printing pressure between the blanket cylinder and the impression cylinder. The tracking system has at least one second actuating drive coupled to the at least one first actuating drive in terms of control technology through an electronic control device, in such a way that the form cylinder is adjusted automatically.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagrammatic, longitudinal-sectional view of a sheet-fed printing press having an offset printing unit;

FIG. 2 is an enlarged, side-elevational view showing constituent parts of a switching apparatus for throwing on and off and an adjusting apparatus for setting a thickness of a printing material, disposed on an operating side of the printing press;

FIG. 3 is a view similar to FIG. 2 showing constituent parts of the switching apparatus and the adjusting apparatus, disposed on a drive side;

FIG. 4 is a side-elevational view of a tracking system for tracking a printing pressure as a function of changes in another printing pressure in the offset printing unit; and

FIG. 5 is a schematic and block diagram showing electronic linking of actuating drives of the adjusting apparatus, which serves for setting the thickness of the printing material, to actuating drives of an adjusting apparatus, which serves for tracking.

Claims

1. A printing press, comprising: a form cylinder;a blanket cylinder;an impression cylinder;an adjusting apparatus having at least one first actuating drive for setting a printing pressure between said blanket cylinder and said impression cylinder;a tracking system for setting a printing pressure between said form cylinder and said blanket cylinder in dependence on said setting of said printing pressure between said blanket cylinder and said impression cylinder, said tracking system having at least one second actuating drive; andan electronic control device coupling said at least one second actuating drive to said at least one first actuating drive in terms of control technology, for automatically adjusting said form cylinder.

2. The printing press according to claim 1, which further comprises eccentric bearings mounting said form cylinder, a further second actuating drive of said tracking system, and spring limbs connecting said second actuating drives to said eccentric bearings.

3. The printing press according to claim 1, which further comprises a drive side, an operating side, and a switching apparatus for throwing said blanket cylinder on and off said impression cylinder, said switching apparatus having an eccentric bearing on said drive side and an eccentric bearing on said operating side, said blanket cylinder being mounted in said eccentric bearings.

4. The printing press according to claim 3, wherein said adjusting apparatus has a further first actuating drive and stops for determining end positions of said eccentric bearings of said blanket cylinder, and said at least one first actuating drive and said further first actuating drive adjust said stops.

5. The printing press according to claim 3, which further comprises a common, single actuating apparatus for rotating both of said eccentric bearings of said blanket cylinder, and a mechanism having a synchronizing shaft elastically connecting said eccentric bearings of said blanket cylinder to one another.

6. The printing press according to claim 4, which further comprises a common, single actuating apparatus for rotating both of said eccentric bearings of said blanket cylinder, and a mechanism having a synchronizing shaft elastically connecting said eccentric bearings of said blanket cylinder to one another.