Device and method for checking value documents for marking ink

US10573113B2 · kind B2 · utility

Assignee

• GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH · DE

Inventors

• Hendrik Derks · Geretsried, DE
• Jan Domke · Vaterstetten, DE
• Johannes Feulner · Erlangen, DE
• Norbert Holl · Germering, DE
• Steffen Schmalz · Munich, DE
• Dieter Stein
• Stefan Kokrhoun · Gröbenzell, DE

Key dates

• Filing date: Apr 10, 2017
• Grant date: Feb 25, 2020
• Expiry date: Apr 12, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G07D2207/00
• WIPO field: Control
• WIPO sector: Instruments

Abstract

An apparatus and a corresponding method for checking value documents, involves at least one first sensor configured to detect electromagnetic radiation reflected and/or transmitted by a value document and to convert the radiation into corresponding first sensor signals. At least one second sensor is configured to detect sound waves reflected and/or transmitted by the value document and to convert the sound waves into corresponding second sensor signals, and an evaluation device configured to determine a first area value which characterizes a first area of the value document on the basis of the first sensor signals, to determine a second area value which characterizes a second area of the value document on the basis of the second sensor signals, and to infer a possible identification marking of the value document with a marking ink on the basis of the first and second area value.