Method for controlling inking units and/or dampening units
AssigneeHeidelberger Druckmaschinen AG
InventorsPeter Elter, Nikolaus Pfeiffer
Life of this patent
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Abstract
A method for controlling inking units having a plurality of zones and/or dampening units in printing presses, includes determining reference values, which are dependent on surface area coverage and/or location, through the use of a computer for the inking zones in the inking unit. Deviations of detected color measuring values from the reference values are calculated for each inking zone. The calculated deviations are compared with data stored in the computer and corresponding with causes of color problems. The computer determines causes of color problems in the inking unit and/or dampening unit by comparison with the data.
Claims8
A method for controlling inking units having a plurality of zones and/or dampening units in printing presses, the method comprising the following steps:
- providing a printing press with a computer;
- calculating reference values dependent on a surface area coverage and/or location based on presetting values with the computer for the inking zones in the inking unit;
- producing printing material in the printing press and detecting color measuring values on the printing material with a color measuring instrument;
- calculating deviations of detected color measuring values from the reference values for each inking zone with the computer;
- storing the calculated deviations as data in the form of curves;
- comparing, in the computer, the calculated deviations stored as data in the form of curves with stored data in the form of curves corresponding with causes of color problems;
- and
- determining, with the computer, causes for color problems in the inking unit and/or dampening unit by comparison between the stored curves of the calculated deviations and the stored curves corresponding to the color problems.
Dependencies are inferred from the claim text.