CPC B41F 5/24 (2013.01) [B41F 13/14 (2013.01); B41F 13/24 (2013.01); B41F 33/0081 (2013.01)] | 16 Claims |
1. A method of operating a flexographic printing press, the method comprising:
providing the flexographic printing press including a printing cylinder carrying a sleeve with at least one flexographic printing forme or a flexographic printing cylinder and an impression cylinder;
using a motor of the flexographic printing press for adjusting a contact pressure between the printing cylinder or the flexographic printing cylinder and the impression cylinder;
measuring a dot density of the flexographic printing forme in a contact-free manner in a measuring operation in a measuring device before a printing operation;
using a camera and a reference object in the measuring operation;
the reference object extending in a direction parallel to an axis of a cylinder of the measuring device carrying the sleeve during the measuring operation, the reference object creating a reference line for computationally calculating the dot density;
carrying out the adjustment in an automated manner as a function of the dot density of the flexographic printing forme, the dot density being a location-dependent density of printing elevations of the flexographic printing forme, or data computationally derived from the location-dependent density; and
carrying out the printing operation with the adjusted contact pressure.
|