FIELD: printing.
SUBSTANCE: described is a device of self-monitoring and measurement of colours of printed sheets for production of banknotes and similar printed security papers comprising a cantilever containing a support surface for placement of a printed sheet sample; a multifunctional measuring instrument, which includes several sensors containing at least one camera to make pictures of selected sections of the printed sheet sample and a sensor for measuring colour to perform spectrophotometric, colorimetric and/or densitometric measurements in selected points on the printed sheet sample; a display for displaying images made by the camera and measurements made by the sensor for measuring colour; and a control and processing unit connected to the multifunctional measuring instrument and the display. Device contains a movable beam with a sensitive element, where the multifunctional measuring instrument is located, herewith the moving beam with the sensitive element is made with the possibility of displacement along X axis above the support surface of the cantilever and above the entire surface of the printed sheet sample located on the support surface, herewith several sensors are installed onto a common sensor head, which is made able to move inside the movable beam with the sensitive element along Y axis, so that the multifunctional instrument can selectively make pictures of selected sections of the printed sheet sample with the help of the camera or to perform measurements in selected locations on the printed sheet sample with the help of the sensor for measuring colour. Control and processing unit is configured to control displacements of the movable beam with the sensitive element along X axis and the sensor head along Y axis.
EFFECT: proposed is a device of self-monitoring and measurement of colours of printed sheets for production of banknotes and similar printed security papers.
17 cl, 6 dwg
