Heidelberger Druckmaschinen Ag

Clemens Rensch

Martin Greive

Helmut Kipphan

Werner Huber

Wolfgang Geissler

Harald Bucher

Bernd Kistler

Gerhard Fischer

Gerhard Loeffler

Anton Rodi

Erich Michael Zahn

Rainer Buschulte

Andreas Rupprecht

An inkjet printing system includes a configuration of nozzles, respectively having a nozzle chamber formed with a nozzle opening and provided with a respective piezoelectric element. A control device controls the piezoelectric elements. The control device has at least two signal paths switchable-on individually for each of the nozzles. An inkjet printing process uses at least part of the printing system.

Inkjet printing system and inkjet printing process

A device for conveying printed products through a printing-related machine includes at least one endless conveyor belt running over deflecting rollers and having at least one printed product resting thereon during a conveying operation, and a rotating frictional element provided for driving the conveyor belt, the frictional element being in contact with the conveyor belt on a side thereof whereon the printed product is transported.

Device for conveying printed products through a printing-related machine

Method for form-processing paper in a printing press by at least one processing tool and a computer includes converting digital data representing desired processing geometries into signals in the computer, and controlling the at least one processing tool with the signals so as to obtain the processing geometries: and apparatus for performing the method.

Apparatus for form-processing paper in a printing press

A device for transporting a sheet or a folded product by a transport belt includes at least one holder for holding the sheet or the folded product, the holder being operatable by an effect selected from the group consisting of magnetic and thermal effects.

Device for transporting sheets or folded products

A method for transporting a sheet on a ferromagnetic transport belt which includes spacing a first switchable retaining device adjacent the ferromagnetic transport belt. The first switchable retaining device is used to position a magnetic retaining element, for example, a permanent magnet, on a sheet that is adjacent the transport belt. The magnet is released from the first switchable retaining device and is fixedly adhered to the transport belt. The sheet, which is caught between the magnet and the transport belt, is fixed to the transport belt and is transported to a second switchable retaining element that removes the magnet. The invention also encompasses a device including a first switchable retaining device that cooperates with the transport belt in the manner described.

Method and device for transporting sheets by at least one transporting

A method for regulating inking of a printing press. The method includes a first step of providing a picture taking device, a closed-loop control device, and a printed product having a surface with a printed image. A second step of printing a print control strip on the surface next to the printed image. A third step of deriving first picture signals from the print control strip and deriving second picture signals from the printed image with the picture taking device. A fourth step of using the closed-loop control device for deriving actual values representing inking of the print control strip from the first picture signals and comparing the actual values to desired values for deriving resultant comparison values. A fifth step of determining ink adjusting signals for controlling ink distribution devices from the resultant comparison values for varying inking of the print product until a desired value is reached during a printer tuning phase. A sixth step of generating an OK signal when the desired value is reached. A seventh step of using the closed-loop control device for deriving further actual values representing inking of the printed image from the second picture signals and comparing the further actual values to further desired values for creating further resultant comparison values. Lastly, one determines further ink adjusting signals for controlling the ink distribution devices from the further resultant comparison values for varying inking of the printed product.

Method for regulating inking during printing operations of a printing

Process and arrangement for controlling or regulating operations carried

Method for form-processing paper in a printing press by at least one processing tool and a computer includes converting digital data representing desired processing geometries into signals in the computer, and controlling the at least one processing tool with the signals so as to obtain the processing geometries; and apparatus for performing the method.

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Heidelberg, Germany

Clemens Rensch