Apparatus, method and assembly for checking value documents, in particular bank notes, and value-document processing system

US10347069B2 · kind B2 · utility

Assignee

• GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH · DE

Inventors

• Shanchuan Su · Neubiberg, DE
• Steffen Schmalz · Munich, DE

Key dates

• Filing date: Dec 22, 2017
• Grant date: Jul 9, 2019
• Expiry date: Jan 23, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G07D7/005
• WIPO field: Control
• WIPO sector: Instruments

Abstract

An apparatus and method for checking value documents, in particular bank notes, and a value document processing system having at least one sensor for capturing an electromagnetic radiation transmitted by a value document and generating corresponding transmission signals, and an evaluation device for checking whether the value document has a foreign object taking into account the transmission signals. From the transmission signals an edge course of the value document is derived and a rectangle is approximated to the edge course. By comparing the edge course of the transmission image with the rectangle, the presence of a foreign object such as an adhesive tape, can be ascertained.