Heidelberger Druckmaschinen Ag

Markus Wolf

Martin Greive

Alexander Knabe

Michael Kohlmann

Christian Görbing

Ernst-Christian Maschler

Martin Grieve

Markus Stark

Sibel Korkut Punckt

A printing machine includes an inkjet printing head having separately controllable nozzles for applying ink to a transported printing material, a radiation drier having radiation sources for generating electromagnetic radiation to at least partly dry and/or cure the applied ink on the transported printing material and at least one light trap disposed between the inkjet printing head and the radiation drier in such a way that the light trap forms a barrier for reflected and/or scattered radiation, thus protecting the inkjet printing head from radiation. The light trap includes at least one channel connected to an aspiration device for aspirating contaminated ambient air through the channel and reducing or preventing contamination of the radiation drier.

Printing machine with an inkjet printing head, a radiation drier and at least one light trap

An apparatus and a method for changing printing plates in sheet-fed rotary printing presses include a plurality of printing units and plate cylinders being coupled to one another mechanically in the printing units during a printing operation. At the beginning of a plate change, the plate cylinders are coupled to one another mechanically and are driven jointly by a main drive motor. After an old printing plate has been conveyed out, each plate cylinder is decoupled from the common mechanical connection and is driven by a separate drive motor.

Method for improved plate change and sheet-fed offset printing press having a plate change apparatus

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Heidelberg, Germany

Markus Wolf