Giesecke & Devrient Gmbh

Hans-Uwe Richter

Lothar Schuett

Bernd Wunderer

Jan Domke

Klaus Thierauf

Jürgen Schützmann

Ulrich Schanda

Lukas Löffler

Ultraviolet light is used for checking the authenticity of sheet material, in particular bank notes, whereby the ultraviolet light transmitted, i.e., pervading the sheet material to be checked, is used for checking authenticity.

Methods and apparatuses for checking the authenticity of sheet material

Ultraviolet light is used for checking the authenticity of sheet material, in particular bank notes, whereby the ultraviolet light transmitted, i.e. pervading the sheet material to be checked, is used for checking authenticity.

Methods and devices for verifying the authenticity of sheet-type products

A method and apparatus for recognizing foreign material (), in particular adhesive objects, glue or joints, on or in bank notes (), including detecting the thermal radiation () emanating from at least a partial area of the bank note (): and recognizing foreign material () located on the bank note () on the basis of the detected thermal radiation (). The invention is especially suitable for recognizing adhesive objects, in particular adhesive tape and joints, on bank notes since areas of a bank note with adhesive tape or joints differ very distinctly in their thermal properties from other areas of the bank note without adhesive tape.

Method and apparatus for recognizing foreign material on bank notes

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Munich, Germany

Hans-Uwe Richter