Heidelberger Druckmaschinen Ag

Forschungszentrum Karlsruhe Gmbh

Robert Boschgmbh

Immanuel Fergen

Frank Schumann

Martin Schmitt-Lewen

Joachim Sonnenschein

Andreas Henn

Manfred Schneider

Michael Gieser

Eugen Hohmann

Stefan Henneck

Jan Krieger

Andreas Böttger

Thorsten Euler

Martin Haas

Evgeny Kurmakaev

Frank Soltwedel

Klaus Seemann

Edgar Doersam

Karl-Heinz Walther

Christian Wagner

Axel Von Der Weth

Christoph Godau

Timo Volk

Marcel Mahner

Dominik Albrecht

A method for automated alignment and register measurement in a printing press provides for test patterns having multiple color separations to be printed by the printing press on a printing substrate, recorded by using at least one image sensor of an image acquisition system as a digital overall image, evaluated by a computer with respect to an alignment/register offset and then corrected by the computer for the alignment/register offset. Circular measuring marks having known diameter for each color separation are integrated into the test patterns and the computer ascertains the center position of each circular measuring mark with subpixel accuracy and thus computes the alignment/register offset by cutting out an image region having at least one circular measuring mark from the digital overall image and determining parameters of a model of a printing point of the circular measuring mark from the digital overall image.

Method for automated alignment and register measurement using circular measuring marks

A method for image inspection on printed products in a printing material processing machine. Printed products are recorded and digitizing and the recorded images are compared with a digital reference image to find image areas with distorted regions. Suitable rectification factors are calculated and the digital reference image is rectified with suitable rectification factors for the distorted image areas. The modified digital reference image is then compared to images recorded during the production run. If deviations are found, the printed products are found defective and removed. The computer also identifies image areas in the reference image that do not have enough edges for calculating suitable rectification factors and inserts anchors into the image areas. The anchors are printed, recorded and digitized, as they become part of the recorded digital printed image. In that case, the computer calculates the local rectification factors by way of the anchors.

Image inspection method with local image rectification

A method for image inspection of printed products in a printing material processing machine includes using an image sensor to capture and digitize printed products during image inspection by an image capture system, using a computer to carry out a comparison of captured digital printed images with a digital reference image, examining a result of the comparison for image regions with blurry regions in the captured digital printed image, calculating suitable smoothing factors for the blurry image regions, and then carry out smoothing of the digital reference image with the calculated, suitable smoothing factors for the blurry image regions, causing the digital reference image to have a blurriness comparable to the captured digital printed image in the image regions. Printed products detected as faulty are removed upon an occurrence of deviations of the captured digital printed image from the digital reference image.

Method for image inspection of printed products using adaptive image smoothing

A method is provided for checking an image inspection system having a camera system with a camera, an illumination apparatus for targeted illumination of a printing substrate, an image processing computer, and a main computer, for quality control of products of a printing substrate processing machine by using the main computer. A reference image is entered and transmitted to the main computer, a current printing image recorded by the camera system is transmitted to the image processing computer, a partial image in a suitable region of the current printing image, not being printed with printing image data, is selected in the image processing computer, the partial image is analyzed by comparison with the reference image in the image processing computer, and the inspection system is assessed based on the analysis of the partial image by the main computer and any defects of the inspection system being found are indicated.

Method for checking an image inspection system

For the production of embossed microstructures in radiation-curing materials, use is made of a micro embossing form fixed to a reflective or scattering cylinder surface. Via a press nip, the micro embossing form comes into contact with the substrate guided over a cylinder or a deflection roller. The radiation-curing material is acted on in one or both pockets, before or after the press nip, with radiation which penetrates into the press nip by reflection or scattering.

Method and apparatus for producing embossed structures in radiation-curing materials

A method and a device for producing and transferring diffractive microstructures to a printing material include applying a fluid to an embossing cylinder and there, during the rotation of the embossing cylinder, solidifying the fluid to such an extent that the fluid is transferred to a printing material in the manner of a film with a solidified microstructure. The embossing cylinder has a cover which is preferably constructed to be either soft as a 'flexoshim' or hard as a 'nickel shim.' A web-fed or sheet-fed rotary printing press having the device is also provided.

Method and device for producing and transferring diffractive microstructures to a printing material and printing press having the device

A system for locating and identifying at least two separate items, for example packaging, includes a capacitive first sensor detecting a first measuring region at a first position of a sensor device, for example a sensor film on a shelf bottom for packaging, a capacitive second sensor detecting a second measuring region at a second position, differing from the first position, of the sensor device, an electrically conductive first mark of a first item in the measuring region of one sensor, an electrically conductive second mark of a second item in the measuring region of the other sensor, and an evaluation device evaluating signals from the sensors, the signals caused or changed by electrical conductivity of the marks. Items can be capacitively detected and information obtained can be used to improve warehousing. The sensors and the marks can be produced quickly and cost-effectively by printing processes or film transfer.

System for locating and identifying at least two separate items

In an I-conductor for the high-frequency or microwave systems, two uniform cores are disposed parallel to each other with a gap therebetween and a coil is disposed on each core in such a way that, when energized by an HF current, a magnetic circuit through the two cores is generated by way of the gap at one end of the arrangement. The magnetic field forming windings are uniform. As cores, magnetically anisotropic materials may be used.

I-inductor as high-frequency microinductor

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Karlsruhe, Germany

Immanuel Fergen