CZ380099A3 - Use and method of testing authenticity of documents with optically flexible effective safety layers - Google Patents

Abstract

The invention relates to an application and a method for checking documents. Hitherto, documents with optical diffraction security layers, specially holograms, were checked by costly optical monitoring technology. The entire monitoring process was so time-consuming that the monitoring process could not be applied to fast operating processing machines. Rapid monitoring (as an authentication characteristic) constitutes a further security step in evaluating effective optical diffraction security layers. The effective optical diffraction layer has a discontinuous metallizing layer and/or partially metal layers and/or areas of metal layers on various planes. Several methods of measurement exist to detect electrical conductivity. In practice, the contactless capacitive method of measurement has proven to be more practical.

Description

Technical field

The invention relates to the use of a method of authenticating documents using capacitive coupling between a transmitter and a receiver and transmitting power between a transmitter and a receiver with electrically conductive security materials. The invention further relates to a method of authenticating documents using capacitive coupling between a transmitter and a receiver and transmitting power between a transmitter and a receiver with electrically conductive security materials.

BACKGROUND OF THE INVENTION

Documents with optically bending-effective security layers, in particular holograms, have hitherto been inspected by expensive optical inspection devices. The object must be positioned very precisely. The entire inspection process takes so long that these inspection methods cannot be used in high-speed processing machines. For example, testing banknotes with a hologram security feature is not possible in a banknote counting machine because it operates at a rate of between 500 and 1500 banknotes per minute or more.

DE 27 47 156 describes a method and a test apparatus for testing the authenticity of holographically secured identification cards. The hologram is reproduced and an optical check is performed. This method is not suitable for fast, efficient and operator-independent control.

The document EP 0 042 946 describes a device for the production of • ♦ ·

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SUMMARY OF THE INVENTION It is an object of the present invention to overcome the shortcomings of the prior art and to propose the use and method of testing the authenticity of documents having optically bending security layers, in particular holograms. which can be done quickly, independently of the operator and at low cost. The method should be applicable both to document control devices and banknote processing machines, as well as to handheld document testing devices equipped with optically bending security layers.

SUMMARY OF THE INVENTION

The problem is solved and the drawbacks of known solutions of this kind largely eliminate the use of the method of authenticating documents using the capacitive coupling between the transmitter and the receiver and the transmission of energy between the transmitter and the receiver of electrically conductive safety materials according to the invention. The authenticity of documents with optically flexibly effective security layers with a discontinuous metallization layer or partially metal layers or zones of metal layers in different planes is determined and evaluated by electrical conductivity.

For authenticating documents with optically flexurally effective účin · 0

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• 0 • 0 • * The electrical conductivity is determined and evaluated by safety layers with a discontinuous metallization layer and partly metal layers.

To test the authenticity of documents with optically bending security layers with a discontinuous metallization layer and metal layer zones in different planes, the electrical conductivity is determined and evaluated.

To test the authenticity of documents with optically bending security layers with partially metal layers and zones of metal layers in different planes, the electrical conductivity is determined and evaluated.

To test the authenticity of documents with optically bending security layers with a discontinuous metallization layer with partially metal layers and metal layer zones in different planes, the electrical conductivity is determined and evaluated.

In addition, additionally applied security elements may be tested within the demetallised segments in discontinuous metallization layers and / or partially metal layers and / or between zones of metal layers in different planes.

Fluorescence properties of additionally applied security elements can be tested.

The phosphorescent properties of additionally applied security elements can also be tested.

In addition, it is also possible to test light absorption by additionally applied security elements.

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Another possibility is to test the magnetic properties of the additionally applied safety elements from the surroundings.

The optically bending security layer is preferably a hologram.

Holograms can be tested in fast-working processing machines at speeds of up to 2000 documents per minute.

However, holograms can also be tested in handheld devices.

The present invention also provides a method of authenticating documents using capacitive coupling between a transmitter and a receiver, and transmitting energy between a transmitter and a receiver of electrically conductive security materials, the subject matter of which is to investigate a document with optically bending security layers with a discontinuous metallizing layer. and / or partially metal layers and / or metal layer zones in different planes are guided at a defined speed around the sensing electronics, the energy from one or more emitting electrodes is capacitively transmitted via metallizing layers to one or more receiving electrodes and signals present on the receiving electrode; The electrodes are amplified by the evaluation electronics, compared to a reference signal, and at the output of the evaluation electronics a signal is generated for further processing that classifies the document.

The document with optically bending security layers is preferably tested in at least two different test directions.

The classification signal is provided by the evaluation electronics

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It logically associates with the authenticity signal of an additional security element, sensed by another sensor and applied to the output of the evaluation electronics, for the next associated signal that classifies the document.

processing generates

The use of holograms and other optically flexurally effective security layers to secure diplomas and other securities and banknotes against counterfeiting is now increasingly and widespread. Another level of security in evaluating documents with optically bending layers as security features is the speed of this inspection. The optically flexurally effective security layers consist, inter alia, of a metallizing layer which is electrically conductive. Depending on the thickness of the metallization layer, its electrical conductivity changes. The optically bending security layer comprises a discontinuous metallization layer and / or partially metal layers and / or metal layer zones in different planes. Various methods of measuring electrical conductivity are known. In practice, non-contact capacitive measurement has proved to be easy to implement. This method of authenticating secure documents utilizes a capacitive coupling between the transmitter and the receiver and transmitting energy between the transmitter and the receiver by bridging the electromagnetic field with electrically conductive security materials. The follow-up evaluation electronics compares the waveform of the test object with the corresponding reference signals. The result of the purging is a classification signal which is further processed.

for example, sort out a document found to be counterfeit, and the test device stops. The signal path is the structure of the metallization layer of the optically bending effective security layer. If the optically bending security layers comprise a discontinuous metallization layer, the individual segments of the metallization layer have different electrical values from one another

This way it is possible to be dependent on • ···

- 6 · »» 6 6 * * * * * * * * * 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 © © conductivity. in practice, it has been shown that these different values of electrical conductivity are reflected in the waveform.

The combination of electrical conductivity testing with other safety features of the optically bending layer provides a further enhancement of the test reliability. By providing additional security elements in the demetallised segments within the discontinuous metallization layers and / or partially metal layers and / or between the zones of the metal layers in different planes, both these elements and the electrical conductivity can be controlled simultaneously. Using the evaluation electronics, the authenticity signal from another sensor can be associated logically with the electrical conductivity measurement signal to determine the authenticity. At the output of the evaluation cl, a signal is then available for further processing which classifies the optically bending layer. Said additional security element has fluorescent, phosphorescent or light-absorbing properties or differs from its surroundings by its different magnetic properties. Thus, an optical or magnetic sensor is used. In order to prevent detection and measurement errors, a holder is preferably used for the sensors, on which all sensors for detecting the security elements are arranged. In this way, the distances between the sensors are also reduced to a minimum and the individual sensors are always arranged in defined positions. In order to avoid interference, the sensor holder is compactly connected to the board that carries the evaluation electronics. The entire test device is arranged inside the processing machines, so that no further measures are required to transport the test objects.

BRIEF DESCRIPTION OF THE DRAWINGS

The features of the invention follow from the claims and from the description and drawings, the individual features being claimed herein

Ochrany · * ochrany ochrany ochrany způsobil ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany ochrany způsobil způsobil způsobil způsobil způsobil způsobil způsobil ochrany partial combinations. BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated by the following non-limiting examples, which are described in the accompanying drawings, which show:

- a schematic cross-section of a processing machine with a test device in FIG. 1,

FIG. 2a

Fig. 2b in Fig. 3a

FIG. 3b

- Fig. 4a is a schematic cross-section of a hologram with demetallized segments, a voltage waveform of the evaluation signal, a schematic cross-section of the hologram with a discontinuous metallization layer, a waveform of the voltage of the evaluation signal,

FIG. 4b

Fig. 4c shows the voltage waveform of the evaluation signal from the electrical conductivity measurement, and the voltage waveform of the evaluation signal of the UV sensor.

DETAILED DESCRIPTION OF THE INVENTION

In the test method according to the invention, it is assumed that appropriate sensors are installed at suitable locations of the banknote counting machines. The sensors for measuring electrical conductivity are

- 8 · to · to · to · to to · to · tototo · to tototo designed to scan the entire width of the banknote, so that the testing of banknotes by the sensor may be positionally neutral. Optical or mechanical sensors detect the presence of a banknote and generate a reference signal for timing control of the test device 4. Simultaneously, the sensors for testing the authenticity of the hologram are activated. By recording the entire time window from the beginning of the banknote to the end, the position of the hologram on the banknote can be determined.

FIG. 1 shows the arrangement of the test device 4 in the banknote transport path. The banknote counting machine comprises a pull-in wheel 1, transport wheels 2, a bank note guiding device 3 and a test device 4 _;

Fig. 2a shows a schematic cross-section of a hologram with a carrier layer 11 and a partially metal layer 12 in which the demetallized segments 13 are formed. Fig. 2b shows the voltage waveform of the respective evaluation signal.

Fig. 3a shows a schematic cross-section of a hologram with a carrier layer 11 and a discontinuous metallization layer 14. This discontinuous metallization layer 14 comprises segments 15, 16, 17, 18, 19 with different electrical conductivity. Fig. 3b shows the voltage waveform of the respective evaluation signal.

Fig. 4a is a schematic cross-sectional view of a hologram with a carrier layer 11 and a discontinuous metallization layer 20. This discontinuous metallization layer 20 comprises demetallized segments 21 and additional security elements consisting of fluoroscopic dyes 22 that are UV-excited and detected by photosensors. . Fig. 4b shows the time course • ··· ft • ft • ·

- 9 V «napětí ft ft ft napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí napětí Fig. 4c shows the voltage waveform of the photosensor evaluation signal.

In the foregoing description, the authenticity testing of security-layered documents having an optical bending effect has been explained by way of example. It should be noted, however, that the present invention is not limited to the details of the exemplary embodiment, as various modifications and variations are intended to be within the scope of the claims.

Claims (16)

PATENT CLAIMS Use of a method of authenticating documents using capacitive coupling between a transmitter and a receiver and transmitting power between a transmitter and a receiver of electrically conductive security materials, characterized in that for authenticating documents with optically bending security layers with a discontinuous metallizing layer (14) or partially by metal layers (12, 20) or metal layer zones in different planes, the electrical conductivity is determined and evaluated. Use of the method according to claim 1, characterized in that the electrical conductivity is determined and evaluated for testing the authenticity of documents with optically bending security layers with a discontinuous metallization layer (14) and partially metal layers (12, 20). Use of the method according to claim 1, characterized in that the electrical conductivity is determined and evaluated for testing the authenticity of documents with optically bending security layers with a discontinuous metallization layer (14) and metal layer zones in different planes. Use of the method according to claim 1, characterized in that the electrical conductivity is determined and evaluated for testing the authenticity of documents with optically bending security layers with partially metal layers (12, 20) and metal layer zones. φ φ φ · · · · · · · φ • φ φ φ φ φ φ φ - 11 Use of the method according to claim 1, characterized in that for testing the authenticity of documents with optically bending security layers with a discontinuous metallization layer (4), partially metal layers (12, 20) and zones of metal layers in different planes, and evaluates electrical conductivity. 6. Use of the method according to one or more of Claims 1 to 5, characterized by testing additionally applied security elements inside the demetallised segments in the discontinuous metallization layers (4) and / or partially metal layers (12, 20) and / or between the metal viral zones νΆπ υ · γ \ ττ · j- v * and «xj. jr vn J- 'w' V. Use of the method according to claim 6, characterized in that the fluorescence properties of the additionally applied security elements are tested. Use of the method according to claim 6, characterized in that the phosphorescence properties of the additionally applied security elements are tested. Use of a method according to claim 6, characterized in that the light absorption is additionally applied with security elements. Use of a method according to claim 6, characterized in that the magnetic properties of the additionally applied security elements are different from the surroundings. Use of the method according to one or more of the preceding claims, characterized in that it is optically 11. • · · »··· ♦ the flexurally effective security layer is a hologram. Use of the method according to one or more of the preceding claims, characterized by testing holograms in fast-working processing machines at speeds of up to 2000 documents per minute. Use of a method according to one or more of the preceding claims, characterized by testing holograms in hand-held devices. A method of authenticating documents using capacitive bonding between a transmitter and a receiver and transmitting power between a transmitter and a receiver of electrically conductive security materials, characterized in that the test document with optically flexurally effective security layers with a discontinuous metallizing layer (14) and / or partially metal layers (12, 20) and / or metal layer zones in different planes are guided at a defined speed around the sensing electronics, the energy from one or more transmitting electrodes is capacitively transmitted via metallizing layers to one or more receiving electrodes and signals present on the receiving electrode or electrodes are amplified by the evaluation electronics, compared to a reference signal, and at the output of the evaluation electronics a signal is generated for further processing that classifies the document. Method according to claim 14, characterized in that the document with optically flexibly effective security layers is tested in at least two different test directions. - 13 «« ·· «· · * · * • 999 9 9 9 · · · · 9 9 9 9 9 99 999 119 9 · 1 · * · · · «· * * Method according to claim 14, characterized in that the classification signal is logically associated with the evaluation electronics with the authenticity signal of an additionally applied security element sensed by another sensor, and at the output of the evaluation electronics a associated signal is generated for further processing which classifies the document.