Print control strip for color measurement on printing material, measuring method and method of metering ink
AssigneeHeidelberger Druckmachinen AG
InventorsStefan Billmaier, Bernd Wenzel
Life of this patent
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Abstract
A print control strip to be applied to printing material during a multicolor printing process, includes multiple measuring fields associated with one ink zone on the printing material. The measuring fields, which are associated with one ink zone, include at least two gray measuring fields. A method of measuring measuring fields in print control strips on printing material with a measuring device and a control unit connected thereto, and a method of controlling metering of ink in offset printing presses including at least one ink metering device in each printing unit and a control unit, are also provided.
Claims4
A method of controlling metering of ink in offset printing presses having printing units, at least one ink metering device in each printing unit, and a control unit, the method comprising the following steps:
- measuring a measuring strip including a plurality of gray measuring fields in different continuous tones within an ink zone on a printed product, with a color measuring device, the gray measuring fields being disposed in at least two parallel rows, each gray measuring field present in a first row of the at least two parallel rows being present at least once in each further row of the at least two parallel rows;
- feeding measured gray values to the control unit for controlling the metering of the ink in the printing units;
- calculating nominal values for controlling the metering of the ink in the printing units with the control unit and transmitting the nominal values to the printing units;
- and
- controlling the metering of the ink in the printing units based upon the nominal values.
Dependencies are inferred from the claim text.