Heidelberger Druckmaschinen Ag

Robert Mueller

Frank Schumann

Helmut Meyer

Manfred Schneider

Jan Krieger

Frank Soltwedel

Peter Eisele

Markus Donges

Holger Scholz

A method of inspecting images on printed products by a computer in a printing machine. Printed products are recorded and digitized by an image sensor of an image inspection system in the course of the image inspection process, and the computer compares them to a digital reference image. If deviations are found, the defective printed products are removed. The computer analyzes the deviations found in the course of the image inspection process together with further data from other system parts and from the machine, determines specific defect classes and the causes thereof based on the defects by machine learning processes, assigns the defects found in the image inspection process to the defect classes in a corresponding way, and displays the classified detected defects with their defect classes and causes to an operator of the machine so that the operator can initiate specific measures to eliminate the defect causes.

Printed image inspection method with defect classification

An ink control method is provided for printing machines having a computer. The color areas are scanned on a surface to be printed using a color measuring device. The surface is a printing substrate coated with opaque white, and the color measuring device takes a number of opaque white color measurements. The computer compares the measured opaque white color values to each other or to a reference color value of the opaque white and stores deviations detected in the computer. The color measurement fields are printed onto the printing substrate. The color measurement fields printed onto the opaque white are measured by the color measuring device. The comparison of the measured color values of the color measurement fields under laid with opaque white and the target color values of the original for color control purposes, the computer factors in the influence of the stored detected deviations.

Method for multi-stage control and measurement of opaque white

A method for operating a machine that processes printing substrates in sheet form, in particular, a printing press, including a delivery device () which contains a drive () for conveying the substrate sheets and at least one opening () through which the substrate sheets are conveyed from the inside () of the delivery device () to an externally accessible region (), and further including a control device which controls at least one closing device () for opening or closing the opening () and which is operatively connected to the drive () of the delivery device (). Also provided is a device for carrying out the method. The present invention has the feature that the opening () is closed or is closed by the control device when no substrate sheet is conveyed through the opening ().

Protective device for a delivery device

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Moerlenbach, Germany

Robert Mueller