Patents by Inventor Ralf Denger

Ralf Denger 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).

  • Washing device for a cylinder in a printing press
    Patent number: 8528476
    Abstract: A washing device for a cylinder in a printing press includes a washing cloth for removing contaminants and ink, etc. from the surface of the cylinder and an ultrasonic source directing sound energy onto the surface of the cylinder to assist a washing operation. A focusing device disposed in front of the ultrasonic source concentrates the sound energy on a substantially linear focus region on the surface of the cylinder, extending parallel to the axis of the cylinder.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: September 10, 2013
    Assignee: Heidelberger Druckmaschinen AG
    Inventors: Gerd Raasch, Ralf Denger