Patents by Inventor Ralf jachmann

Ralf jachmann 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 detecting errors in individual color separation images of a multi-color printing machine
    Patent number: 8625159
    Abstract: A method for detecting errors in individual color separation images of a multi-color printing machine, in particular an electrophotographic printing machine, comprising a plurality of printing units, is described. Using this method, first a plurality of first register lines is printed with a first printing unit, and a plurality of second register lines is printed with a second printing unit in such a manner that each of the first register lines, together with one of said second register lines, is positioned inside a respective registration frame. Then the plurality of the first and second register lines in the respective registration frame are detected with a register sensor, and an output signal of the register sensor relating to the respective second register line is compared with an intensity threshold value in order to determine whether the second register lines can be recognized.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: January 7, 2014
    Assignee: Eastman Kodak Company
    Inventors: Jan D. Boness, Ingo K. Dreher, Heiko Hunold, Ralf Jachmann, Ralph Petersen, Frank Pierel, Stefan Schrader, Matthias Wecker, Tim D'Avis
  • METHOD FOR DETECTING ERRORS IN INDIVIDUAL COLOR SEPARATION IMAGES OF A MULTI-COLOR PRINTING MACHINE
    Publication number: 20110063643
    Abstract: A method for detecting errors in individual color separation images of a multi-color printing machine, in particular an electrophotographic printing machine, comprising a plurality of printing units, is described. Using this method, first a plurality of first register lines is printed with a first printing unit, and a plurality of second register lines is printed with a second printing unit in such a manner that each of the first register lines, together with one of said second register lines, is positioned inside a respective registration frame. Then the plurality of the first and second register lines in the respective registration frame are detected with a register sensor, and an output signal of the register sensor relating to the respective second register line is compared with an intensity threshold value in order to determine whether the second register lines can be recognized.
    Type: Application
    Filed: January 22, 2009
    Publication date: March 17, 2011
    Inventors: Jan D. Boness, Ingo K. Dreher, Heiko Hunold, Ralf jachmann, Ralph Petersen, Frank Pierel, Schrader Stefan, Matthias Wecker, Tim D'Avis