Patents by Inventor Mina Abosetta

Mina Abosetta 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 defective printing nozzles in an inkjet printing machine
    Patent number: 10603923
    Abstract: A method for detecting defective printing nozzles in an inkjet printing machine includes printing a multi-row printing nozzle test chart formed of horizontal rows of equidistant vertical lines periodically underneath one another, with only printing nozzles in a print head contributing to every row of the test chart corresponding to the horizontal rows. An area coverage element geometrically associated with the test chart is printed, both elements are recorded by an image sensor and analyzed by the computer. The computer analyzes the recorded area coverage element to detect print defects and allocates defects to a region of geometrically close printing nozzles. An analysis of the test chart in the region identifies nozzles causing the defect. Defective printing nozzles are detected based on thresholds, the detected printing nozzles are then compensated, and in the analysis of the recorded area coverage element, influences of the sensor are eliminated by shading correction.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: March 31, 2020
    Assignee: Heidelberger Druckmaschinen AG
    Inventors: Johannes Muehl, Hans Koehler, Roland Stenzel, Andreas Henn, Martin Mayer, Steffen Neeb, Frank Muth, Jan Krieger, Nicklas Raymond Norrick, Mina Abosetta
  • METHOD FOR DETECTING DEFECTIVE PRINTING NOZZLES IN AN INKJET PRINTING MACHINE
    Publication number: 20190248153
    Abstract: A method for detecting defective printing nozzles in an inkjet printing machine includes printing a multi-row printing nozzle test chart formed of horizontal rows of equidistant vertical lines periodically underneath one another, with only printing nozzles in a print head contributing to every row of the test chart corresponding to the horizontal rows. An area coverage element geometrically associated with the test chart is printed, both elements are recorded by an image sensor and analyzed by the computer. The computer analyzes the recorded area coverage element to detect print defects and allocates defects to a region of geometrically close printing nozzles. An analysis of the test chart in the region identifies nozzles causing the defect. Defective printing nozzles are detected based on thresholds, the detected printing nozzles are then compensated, and in the analysis of the recorded area coverage element, influences of the sensor are eliminated by shading correction.
    Type: Application
    Filed: February 11, 2019
    Publication date: August 15, 2019
    Inventors: JOHANNES MUEHL, HANS KOEHLER, ROLAND STENZEL, ANDREAS HENN, MARTIN MAYER, STEFFEN NEEB, FRANK MUTH, JAN KRIEGER, NICKLAR RAYMOND NORRICK, MINA ABOSETTA