Giesecke & Devrient Gmbh

Giesecke+devrient Currency Technology Gmbh

Stefan Kokrhoun

Jan Domke

Dieter Stein

Norbert Holl

Steffen Schmalz

Klaus Thierauf

André Gregarek

Matthias Hecht

Patrick Renner

Johannes Feulner

Franz Müller

Hendrik Derks

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.

Device and method for checking value documents for marking ink

A method is for examining a sheet-shaped or card-shaped value document with a security feature having one or more cavities configured in the value document. The width of the cavity or cavities is in at least one respectively specified direction exceeding 10 &#x3bc;m. Transmission values are established in a locally resolved manner for the transmission of ultrasound in a specified frequency range. In employing the transmission values, it is checked whether a specified number of transmission values is greater than a specified transmission threshold value.

Method and device for examining a sheet-shaped or card-shaped valuable document having a security feature having one or more cavities

A method for the determination of classification parameters or adaptation parameters for the classification of bank notes in different classes by means of a bank note processing apparatus includes: sensing measurement data for a plurality of reference bank notes having known properties by means of a sensor device of the bank note processing apparatus, at least some of the reference bank notes being provided with an adhesive strip; determining a set of classification parameters; ascertaining the distribution of the plurality of reference bank notes over the different classes on the basis of the measurement data of the reference bank notes and the set of classification parameters; and comparing the distribution over the different classes determined for the plurality of reference bank notes, with the optimal distribution of the reference bank notes over the different classes, and ascertained from the known properties of the plurality of reference bank notes.

Method and apparatus for the determination of classification parameters for the classification of bank notes

In a method for assessing a condition of at least one value document with regard to limpness, there is determined from transmission values representing the ultrasound transmission at different places on the value document a condition value which depends on a variation of the transmission values and characterizes the condition of the value document with regard to limpness. A condition of the value document is determined for the condition value using a preset criterion.

Method for assessing a state of a document of value with regard to limpness using ultrasound, and means for carrying out the method

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Grobenzell, Germany

Stefan Kokrhoun