Patent · US Active

Method and apparatus for detecting a security thread in a value document

US11521451B2 · kind B2 · utility

0Cited by

9References

21Claims

0Family size

Assignee

GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH · DE

Inventors

Johannes Feulner · Erlangen, DE
Steffen Schmalz · Munich, DE

Key dates

Filing date	Dec 22, 2017
Grant date	Dec 6, 2022
Priority date	—
Expiry date	Jul 27, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG07D2207/00
WIPO fieldControl
WIPO sectorInstruments

Abstract

A method is provided for detecting a security thread in a value document, in which magnetic data are employed for sites on the value document. The magnetic data represents a magnetic property of the value document at the site, check sites on the value document are determined employing the sites, and from the check sites, a straight line is specified, along or on which at least some of the check sites lie and which represents a location of the security thread.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.