Patents by Inventor Andreas Alexander

Andreas Alexander has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Safe electric braking device for printing presses and method of electrically braking an electric drive in a machine processing printing material
    Patent number: 8026681
    Abstract: A method and device for electrically braking an electric drive in a machine for processing printing material, includes a power electronics connected between the electric drive and a DC voltage intermediate circuit. A further electric braking device is switchable between the electric drive and the power electronics. Upon a failure of a power system, a computer initiates a generator-type braking operation through the power electronics. The further electric braking device is switched on upon the failure of the power electronics.
    Type: Grant
    Filed: December 24, 2007
    Date of Patent: September 27, 2011
    Assignee: Heidelberger Druckmaschinen AG
    Inventors: Andreas Alexander, Jochen Bechtler, Wolfgang Dürr, Klaus Hartmann, Klaus-Dieter Kleibaumhüter, Helmut Meyer
  • Safe Electric Braking Device for Printing Presses and Method of Electrically Braking an Electric Drive in a Machine Processing Printing Material
    Publication number: 20080150459
    Abstract: A method and device for electrically braking an electric drive in a machine for processing printing material, includes a power electronics connected between the electric drive and a DC voltage intermediate circuit. A further electric braking device is switchable between the electric drive and the power electronics. Upon a failure of a power system, a computer initiates a generator-type braking operation through the power electronics. The further electric braking device is switched on upon the failure of the power electronics.
    Type: Application
    Filed: December 24, 2007
    Publication date: June 26, 2008
    Applicant: HEIDELBERGER DRUCKMASCHINEN AG
    Inventors: Andreas Alexander, Jochen Bechtler, Wolfgang Durr, Klaus Hartmann, Klaus-Dieter Kleibaumhuter, Helmut Meyer
  • Method for driving rollers of a printing unit of a printing press
    Publication number: 20060150835
    Abstract: A method for driving rollers of a printing unit of a printing press, includes driving at least two of the rollers at different speeds for transferring liquid. A change in the torque on one of the rollers is determined. A drive for at least one of the rollers is set in dependence on the change in the torque.
    Type: Application
    Filed: June 30, 2005
    Publication date: July 13, 2006
    Inventors: Peter Heiler, Holger Leonhardt, Peter Palmen, Roland Vay, Andreas Alexander, Rolf Spilger