Patents by Inventor Johannes Slotta

Johannes Slotta 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 controlling the ink guidance in a printing machine
    Patent number: 5551342
    Abstract: A method for controlling the ink guidance of a printing machine, especially a sheet-fed offset printing machine. Ink-density spectra are recorded by means of a spectral photometer at a plurality of image points of the original and of the printed copy and the differential ink-density spectra are determined from these values. These differential ink-density spectra are then represented as a linear combination of the individual ink-density spectra of the inks participating in the composite printing. Regulating commands for the ink-guide members of the printing machine are thereupon derived from the proportionality factors of this linear combination.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: September 3, 1996
    Assignee: MAN Roland Druckmaschinen AG
    Inventors: Thomas Fuchs, Johannes Slotta, Dieter Wagner