The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 2021
Filed:
Feb. 28, 2018
Giesecke+devrient Currency Technology Gmbh, Munich, DE;
Jürgen Schmützmann, Pfaffenhofen, DE;
Helmut Pradel, Munich, DE;
GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich, DE;
Abstract
A method for checking of magnetic properties of value documents with the aid of a magnetic sensor comprises a measuring sensor row having a plurality of magneto-sensitive measuring sensor elements, as well as at least one further magneto-sensitive sensor element which is arranged behind the measuring sensor elements and has a greater distance from the transport plane of the value document than the measuring sensor elements. By means of the further sensor elements, correction signals are detected at correction measuring points of the value document, which are disposed on the same measuring line as the measuring points. In order to eliminate the distance dependence of the measuring signals, the respective measuring signal of each measuring point is corrected on the basis of the signal drop which the correction signal ascertained for this measuring point has in comparison to the measuring signal of the respective measuring point.