Patent DE-102007059176-A1 (DE)
Title: Printing machine comprises an optical measuring device, with which light is examined for optical actual values, where the machine disposes over a color line system, a controlling- and an evaluation device, and a viscosity measuring device
Inventor: IHME ANDREAS
IPC: B01F23/47
Filed: 2007-12-06
Abstract: The printing machine (2) comprises an optical measuring device (4), with which light is examined for optical actual values (I), where the printing machine disposes over a color line system, with which color of a feed line point is supplyable to a printing material (6), a controlling- and an evaluation device, a device for measuring the viscosity of the color present in the color line system, a connector for transmitting the measured value of the viscosity measuring device to the controlling- and evaluation device, and a memory device, in which the composition of the color is stored. The printing machine (2) comprises an optical measuring device (4), with which light is examined for optical actual values (I), where the printing machine disposes over a color line system, with which color of a feed line point is supplyable to a printing material (6), a controlling- and an evaluation device, a device for measuring the viscosity of the color present in the color line system, a connector for transmitting the measured value of the viscosity measuring device to the controlling- and evaluation device, and a memory device, in which the composition of the color is stored after a color correction in the color line system. The optical actual values are intensity values of light in selected wavelength regions, and the light experiences an interaction with parts of the printed images (9). On the printing machine, a color-mass determination device is intended, by which the weight of the part of the color present in the color line system is determined. The controlling- and evaluation device provide the measured values of the optical measuring device and the color-mass determination device, determine optical deviation delta K and the deviation of the optical actual values from the optical set values (S), which present as light intensity values (L) in selected wavelength regions, and are calculatable based on the optical deviation (K) and the measured values of the determination device as correction colors of a determined composition of the printing machine are guided to adjust the optical actual values of the optical set values. The composition of the color is calculatable after the color correction in the color line system by using the controlling- and evaluation device based on the measured value of the determination device and the viscosity measuring device and the quantity and the composition of the correction colors. The mass of the color, which presents itself in a part of the parts of the color line system, in which no determination of the color mass is carried out by the determination device, is estimated by the controlling- and evaluation device. The controlling- and evaluation device are noted the volumes of the parts of the color line system, in which no determination is carried out by the determination device, where the volumes are based on the estimation by the controlling- and evaluation device. Densitometric measured values are recorded by the optical measuring device and are based on the measurement of the light intensity in first selected wavelength regions. The estimated values are estimated from the densitometric measured values to the light intensity in second selected wavelength regions by the controlling- and evaluation device. The second selected wavelength regions differentiate themselves from the first selected wavelength regions. The light intensity is not measured in the second selected wavelength regions. The controlling- and evaluation device are noted the optical values, which result during the interaction of light with the used color or the used color components and are considerable during the estimation and have parts of a curve, which represents the spectral intensity of the remitted lights, which result during the interaction of light with the used color or the used color components in the wavelength region. The estimated values are considerable for calculating the mass and the composition of the correction colors. The memory device is adjusted for storing optical measured values, color prescriptions and/or color compositions. The controlling- and evaluation device is adjusted to consider the stored values during the processing of a later print job.