Patent ID: 6422142
Filing Date: 2002-07-23
Classification: B41F,G01J

Abstract:
A method for zonal color measurement covering at least essentially an entire length of a printing subject in a rotary printing machine having a plurality of printing units for printing a moving printing material in a plurality of colors, comprising the steps of:continually measuring color intensity of printing inks cyan, yellow and magenta in each inking zone with a common measuring device; continuously measuring ink intensity in each inking zone of black printing ink with a separate measuring device; damping the measured ink continuum for each inking zone by the magnitude of the color intensity determined for the black printing ink, the measuring devices each comprising a light source for each inking zone; comparing the ink continuum measured by the measuring devices and one of scanner measured values and preliminary stage measured values and generating desired ink distribution curves which contain the inking zone values for each printing ink using a regulating device assigned to each of the measuring devices; and fixing the inking zone desired values and delivering regulating values for opening inking zone setting means with an ink regulating computer of the regulating device.