Patents by Inventor Heinrich Wadle

Heinrich Wadle 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).

  • Patent number: 6853467
    Abstract: A method for performing a digital multistage screening of a continuous-tone image with a screen having any desired screen resolution and any desired screen angle, in which the screening is carried out by reading out threshold values and comparing the threshold values read out with the color values of the continuous-tone image. Threshold value matrices are used in which the threshold values represent one or more screen dots of a given screen, with which the desired screen resolution and the desired angle are approximated. While the threshold values are being read out, an error between the coordinates of the desired screen and of the given screen is determined, and the error is compensated for by correcting the read address for the threshold value matrix, as soon as the error exceeds a predefined limiting value. Instead of the threshold value matrices, printing-value matrices can also be used.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: February 8, 2005
    Assignee: Heidelberger Druckmaschinen AG
    Inventors: Heinrich Wadle, Ludo Kerz
  • Publication number: 20030053100
    Abstract: A method for performing a digital multistage screening of a half-tone image with a screen having any desired screen resolution and any desired screen angle, in which the screening is carried out by reading out threshold values and comparing the threshold values read out with the color values of the half-tone image. Threshold value matrices are used in which the threshold values represent one or more screen dots of a given screen, with which the desired screen resolution and the desired angle are approximated. While the threshold values are being read out, an error between the coordinates of the desired screen and of the given screen is determined, and the error is compensated for by correcting the read address for the threshold value matrix, as soon as the error exceeds a predefined limiting value. Instead of the threshold value matrices, printing-value matrices can also be used.
    Type: Application
    Filed: November 8, 2002
    Publication date: March 20, 2003
    Inventors: Heinrich Wadle, Ludo Kerz
  • Patent number: 4585309
    Abstract: In engraving of printing forms particularly of gravure cylinders, it has previously been possible to produce run-free color raster configurations for only two colors. The present invention discloses rastering methods for run-free color production of four color impressions and polychromatic impressions.
    Type: Grant
    Filed: March 21, 1985
    Date of Patent: April 29, 1986
    Assignee: Dr. Ing. Rudolf Hell GmbH
    Inventors: Eggert Jung, Heinrich Wadle
  • Patent number: 4516175
    Abstract: A scanning method for already rastered masters in reproduction technology uses a special diaphragm for avoiding Moire effects in the re-recording.
    Type: Grant
    Filed: May 19, 1982
    Date of Patent: May 7, 1985
    Assignee: Dr. Ing. Rudolf Hell GmbH
    Inventors: Eggert Jung, Heinrich Wadle
  • Patent number: 4443060
    Abstract: In engraving of printing forms particularly of gravure cylinders, it has previously been possible to produce run-free color raster configurations for only two colors. The present invention discloses rastering methods for run-free color production of four color impressions and polychromatic impressions.
    Type: Grant
    Filed: January 21, 1982
    Date of Patent: April 17, 1984
    Assignee: Dr. -Ing. Rudolf Hell GmbH
    Inventors: Eggert Jung, Heinrich Wadle