Patents by Inventor Erich Kerst

Erich Kerst 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: 11830329
    Abstract: A method for testing a value document having a luminescence feature involves guiding the value document past a test sensor in a transport direction. A scanning sequence occurs that repeats itself multiple times upon guiding the value document past the test sensor. The method involves irradiating a test region of the test sensor such that the test radiation is arranged to be remitted by the value document at least partially in a detection spectral range of the test sensor. Excitation radiation is arranged to cause an emission radiation of the luminescence feature in the detection spectral range. The method further involves scanning at least one location-dependent remission spectral value in the test region in the first irradiation phase, irradiating the test region only with the excitation radiation in a second irradiation phase, and scanning at least one location-dependent emission spectral value in the test region after the first irradiation phase.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: November 28, 2023
    Assignee: GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH
    Inventors: Erich Kerst, Thomas Happ
  • Patent number: 11823522
    Abstract: The present invention relates to a method, a sensor, a sensor unit and a bank-note processing machine for checking the completeness and/or authenticity of value documents. A value document comprises at least one machine-readable feature substance in at the least two locations. According to the method, the value document is excited at least locally at measuring locations. Furthermore, a feature intensity with respect to the machine-readable feature substance is captured location-resolved at several different locations of the value document. The location-based feature intensities are classified location-based with the help of a threshold value. Furthermore, location-based limits of a location distribution to be expected of the machine-readable feature substance are determined. Finally, a location-based distribution of the classified feature intensities is assessed.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: November 21, 2023
    Assignee: GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH
    Inventors: Wolfgang Rauscher, Erich Kerst, Thomas Happ
  • Publication number: 20210019976
    Abstract: A method for testing a value document having a luminescence feature involves guiding the value document past a test sensor in a transport direction. A scanning sequence occurs that repeats itself multiple times upon guiding the value document past the test sensor. The method involves irradiating a test region of the test sensor such that the test radiation is arranged to be remitted by the value document at least partially in a detection spectral range of the test sensor. Excitation radiation is arranged to cause an emission radiation of the luminescence feature in the detection spectral range. The method further involves scanning at least one location-dependent remission spectral value in the test region in the first irradiation phase, irradiating the test region only with the excitation radiation in a second irradiation phase, and scanning at least one location-dependent emission spectral value in the test region after the first irradiation phase.
    Type: Application
    Filed: December 21, 2016
    Publication date: January 21, 2021
    Inventors: Erich KERST, Thomas HAPP
  • Publication number: 20200273279
    Abstract: The present invention relates to a method, a sensor, a sensor unit and a bank-note processing machine for checking the completeness and/or authenticity of value documents. A value document comprises at least one machine-readable feature substance in at the least two locations. According to the method, the value document is excited at least locally at measuring locations. Furthermore, a feature intensity with respect to the machine-readable feature substance is captured location-resolved at several different locations of the value document. The location-based feature intensities are classified location-based with the help of a threshold value. Furthermore, location-based limits of a location distribution to be expected of the machine-readable feature substance are determined. Finally, a location-based distribution of the classified feature intensities is assessed.
    Type: Application
    Filed: December 21, 2016
    Publication date: August 27, 2020
    Inventors: Wolfgang RAUSCHER, Erich KERST, Thomas HAPP
  • Patent number: 9310231
    Abstract: The invention relates to a checking unit for checking a material web and to a calibrating method for the checking unit. The checking unit is equipped with drive means for transporting the calibration medium past the checking unit in order to detect a multiplicity of measurement values of the calibration medium. The drive means are arranged in the housing of the checking unit in order for the drive means to be protected from moisture or contaminants from the environment. To obtain a transporting of the calibration medium past the checking unit in spite of the arrangement of the drive means in the housing, drive means are employed that are configured for a contactless interaction with the calibration medium and can transport the calibration medium past the checking unit contactlessly. For this purpose there is preferably used a magnetic interaction between the drive means and the calibration medium.
    Type: Grant
    Filed: July 3, 2012
    Date of Patent: April 12, 2016
    Assignee: GIESECKE & DEVRIENT GMBH
    Inventors: Michael Bloss, Wolfgang Deckenbach, Werner Heimann, Hans-Peter Ehrl, Erich Kerst
  • Patent number: 9245400
    Abstract: A sensor for checking value documents is arranged to carry out a self-test for testing its functionality. The sensor in the self-test reacts to at least one malfunction that is ascertained during the self-test and hinders the check of the value documents by the sensor automatically employing for checking the value documents, instead of the operating mode provided for checking the value documents. A modified operating mode employs at least one other measured value of the sensor for checking the value documents than is determined in the operating mode provided for checking the value documents. In contrast to the hitherto customary function failure of the sensor, the sensor can continue being operated for checking the value documents despite the malfunction.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: January 26, 2016
    Assignee: GIESECKE & DEVRIENT GMBH
    Inventors: Jorg Frankenberger, Michael Bloss, Erich Kerst
  • Patent number: 9171412
    Abstract: A sensor for checking different features of value documents is arranged to carry out a self-test for testing its functionality. Before the sensor carries out its self-test, at least one of the features that is to be checked by the sensor is selected. It is provided in the self-test that the sensor rates a malfunction ascertained in the self-test differently and reacts to the ascertained malfunction differently in dependence on the selected feature. While a malfunction of the sensor has hitherto always led to a failure of the sensor, the sensor, despite ascertained malfunctions, can nevertheless carry out the check of certain features. It is achieved that the number of function failures of the sensor is reduced through the different reactions of the sensor to the ascertained malfunction in dependence on the feature.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: October 27, 2015
    Assignee: GIESECKE & DEVRIENT GMBH
    Inventors: Jorg Frankenberger, Michael Bloss, Erich Kerst
  • Publication number: 20140204366
    Abstract: A sensor for checking value documents is arranged to carry out a self-test for testing its functionality. The sensor in the self-test reacts to at least one malfunction that is ascertained during the self-test and hinders the check of the value documents by the sensor automatically employing for checking the value documents, instead of the operating mode provided for checking the value documents. A modified operating mode employs at least one other measured value of the sensor for checking the value documents than is determined in the operating mode provided for checking the value documents. In contrast to the hitherto customary function failure of the sensor, the sensor can continue being operated for checking the value documents despite the malfunction.
    Type: Application
    Filed: August 13, 2012
    Publication date: July 24, 2014
    Applicant: GIESECKE & DEVRIENT GMBH
    Inventors: Jorg Frankenberger, Michael Bloss, Erich Kerst
  • Publication number: 20140204365
    Abstract: A sensor for checking different features of value documents is arranged to carry out a self-test for testing its functionality. Before the sensor carries out its self-test, at least one of the features that is to be checked by the sensor is selected. It is provided in the self-test that the sensor rates a malfunction ascertained in the self-test differently and reacts to the ascertained malfunction differently in dependence on the selected feature. While a malfunction of the sensor has hitherto always led to a failure of the sensor, the sensor, despite ascertained malfunctions, can nevertheless carry out the check of certain features. It is achieved that the number of function failures of the sensor is reduced through the different reactions of the sensor to the ascertained malfunction in dependence on the feature.
    Type: Application
    Filed: August 13, 2012
    Publication date: July 24, 2014
    Inventors: Jorg Frankenberger, Michael Bloss, Erich Kerst
  • Publication number: 20140130568
    Abstract: The invention relates to a checking unit for checking a material web and to a calibrating method for the checking unit. The checking unit is equipped with drive means for transporting the calibration medium past the checking unit in order to detect a multiplicity of measurement values of the calibration medium. The drive means are arranged in the housing of the checking unit in order for the drive means to be protected from moisture or contaminants from the environment. To obtain a transporting of the calibration medium past the checking unit in spite of the arrangement of the drive means in the housing, drive means are employed that are configured for a contactless interaction with the calibration medium and can transport the calibration medium past the checking unit contactlessly. For this purpose there is preferably used a magnetic interaction between the drive means and the calibration medium.
    Type: Application
    Filed: July 3, 2012
    Publication date: May 15, 2014
    Applicant: GIESECKE & DEVRIENT GMBH
    Inventors: Michael Bloss, Wolfgang Deckenbach, Werner Heimann, Hans-Peter Ehrl, Erich Kerst