Patents by Inventor Gerd Carl

Gerd Carl 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).

  • Method for determining the paper quality for halftone printing
    Patent number: 7084981
    Abstract: The invention relates to a method for determining the paper quality for halftone printing, according to which a finely distributed pattern of geometric figures is applied to the paper, said paper is then illuminated and the light that is reflected and scattered by the paper is observed. The method is characterized in that the pattern is applied to an optical transparent planar element, the side of said element bearing the pattern is brought into contact with the surface of the paper and the paper is pressed against the planar element.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: August 1, 2006
    Assignee: Nordland Papier GmbH
    Inventor: Gerd Carl
  • Method for determining the paper quality for halftone printing
    Publication number: 20040169864
    Abstract: The invention relates to a method for determining the paper quality for halftone printing, according to which a finely distributed pattern of geometric figures is applied to the paper, said paper is then illuminated and the light that is reflected and scattered by the paper is observed. The method is characterised in that the pattern is applied to an optical transparent planar element, the side of said element bearing the pattern is brought into contact with the surface of the paper and the paper is pressed against the planar element.
    Type: Application
    Filed: December 2, 2003
    Publication date: September 2, 2004
    Inventor: Gerd Carl