EP0021350B1 - Procédé pour vérifier un papier de valeur comportant une marque de securité et papier de valeur comprenant une telle marque - Google Patents

Procédé pour vérifier un papier de valeur comportant une marque de securité et papier de valeur comprenant une telle marque Download PDF

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Publication number
EP0021350B1
EP0021350B1 EP80103424A EP80103424A EP0021350B1 EP 0021350 B1 EP0021350 B1 EP 0021350B1 EP 80103424 A EP80103424 A EP 80103424A EP 80103424 A EP80103424 A EP 80103424A EP 0021350 B1 EP0021350 B1 EP 0021350B1
Authority
EP
European Patent Office
Prior art keywords
authenticity
security paper
field
security
authenticity feature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80103424A
Other languages
German (de)
English (en)
Other versions
EP0021350A1 (fr
Inventor
Hajo Mück
Wolfgang Becker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OFFERTA DI LICENZA AL PUBBLICO
Original Assignee
GAO Gesellschaft fuer Automation und Organisation mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GAO Gesellschaft fuer Automation und Organisation mbH filed Critical GAO Gesellschaft fuer Automation und Organisation mbH
Priority to AT80103424T priority Critical patent/ATE5351T1/de
Publication of EP0021350A1 publication Critical patent/EP0021350A1/fr
Application granted granted Critical
Publication of EP0021350B1 publication Critical patent/EP0021350B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
    • D21H21/48—Elements suited for physical verification, e.g. by irradiation
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/04—Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation

Definitions

  • the invention relates to a method for checking the authenticity of a security with a machine-verifiable authenticity feature that has at least one physical property that can be measured, and to such a security.
  • banknotes with magnetic and / or electrically conductive layers are known, which are coded in a manner suitable for automatic machines and arranged in a specific form. The dimensions, the conductivity, the radiation permeability and the arrangement of the layers can be determined in the test device.
  • a banknote with a security thread made of metal is known, which has a specific, individual information for the banknote in coded form. The information can either be in the form of a perforation or a magnetic track.
  • a bank note with a security thread made of ferromagnetic material is also known, which is characterized in that it has a high coercive force, so that any magnetic information that is applied is not so easily deleted by a counterfeiter or can be changed.
  • a method for securing credit cards and securities in which a body contained in the security changes its magnetic properties at a temperature between -10 ° C and 80 ° C; this is achieved by using a ferromagnetic material whose Curie point lies in the temperature range mentioned.
  • the body is warmed up, the real body losing its magnetization when a predetermined temperature is reached. If the temperature is then lowered again below the Curie point, the body does not regain its magnetization; modulation of the magnetization by temperature change is therefore not possible.
  • the differential change in the magnetic properties as a function of the temperature is not used as the authenticity indicator, but the demagnetization at a certain temperature.
  • a method for securing securities is also known, in which the securities are provided with developable materials such as diazo compounds or heat-sensitive Thermofax material.
  • developable materials such as diazo compounds or heat-sensitive Thermofax material.
  • the undeveloped number plate is examined in a first step using scanning technology and in particular its color is determined and recorded.
  • a second step e.g. developed by supplying heat, but also by pressure, moisture, smoke, electrical current, etc.
  • the color is then checked again in a third step.
  • the security is considered genuine if it has changed its characteristic property or color in the expected manner after development.
  • the development is a relatively slow change.
  • the test is necessarily carried out in several steps in succession.
  • the modulation of the characteristic property and the detection of very small changes is also not possible according to the teaching of this patent.
  • DE-C-1 774 290 finally describes a measuring arrangement with which the electrical conductivity of a security thread in securities can be measured without contact.
  • the security thread is brought into the immediate vicinity of a pair of electrodes on which an alternating electric field is applied.
  • the capacitor formed by the two electrodes then changes through capacitive coupling; this change in capacitance affects the resonant circuit; in this way it can be checked whether the security thread is electrically conductive.
  • a security thread as an authenticity feature has certain advantages that explain its widespread use.
  • the thread can only be used during paper or Card production are introduced, the corresponding technology and complex devices are usually not available to the counterfeiter. Its presence can easily be checked visually even without aids. In the event that the thread certain ma automatic features are also quickly recognizable.
  • the counterfeiter can glue two sheets of paper together and thus reduce the difficulties of counterfeiting to imitation of the security thread itself. Imitation of special properties of the security thread on the surface of the security is also possible in some cases.
  • the counterfeiter can easily recognize the physical properties of the security threads measured by the testing device, since corresponding testing devices that can be used as sensors are freely available on the market.
  • the usual physical properties used in this context are electrical conductivity, magnetism, fluorescence etc.
  • the counterfeiter can imitate the properties mentioned relatively easily, for example by reducing the electrical conductivity the security thread is imitated by a pencil line on the surface of the security, certain magnetic properties by a tape strip stuck on and a certain fluorescence behavior by spreading commercially available fluorescent substances.
  • the object of the invention is therefore to create an authenticity feature which has properties which can be clearly checked by machine and which make it more difficult for the forger to analyze and imitate the relevant properties. This object is achieved in the method according to the invention by the morasses characterized in claim 1.
  • the invention is therefore based on the knowledge that the authenticity feature has a basic property, such as a certain electrical conductivity, and that this basic property can be changed by a secondary property, that is to say, for example, a photosensitivity of the electrical conductivity.
  • the electrical conductivity of the conductor which is generally very high-impedance for present applications, is usually determined by measurement by bringing it into a predetermined electrical alternating or constant field (corresponds to the first field) in which the conductor is present by means of galvanic contacts or capacitive coupling causes a field change. The conductivity can then be determined from this field change. A visible or invisible electromagnetic field (corresponding to the second field) acting on the conductor changes the conductivity of the conductor. This change in conductivity can be quantified because of its reaction to the electric field (first field).
  • A, possibly also periodic, change in the specific energetic environment of the security thread also changes the measured variable in a certain clear, possibly periodic manner.
  • the counterfeiter who succeeds in finding or even imitating the basic property, for example a certain electrical conductivity, is thus far from being able to determine the dependence of this basic property on a certain other physical variable, for example the strength of the light radiation. Even if this connection became clear to him, he could not imitate a certain dependency behavior between the measured variable and the influencing parameter.
  • the measured variable is influenced, for example, by introducing the feature substance into a radiation field in the form of visible or invisible light or into electrical or magnetic fields.
  • the form of the influence must be matched to the particular feature substance chosen and the physical property to be measured.
  • the feature substance can be provided, for example, on or in a security thread. However, it can also be used as a pure paper or ink additive, especially for screen printing inks.
  • a security thread consisting of a transparent PVC film was embedded in the middle level of a security with a basis weight of 80 g / m 2 .
  • the thread was 0.4 mm wide and 25 ⁇ m thick.
  • the film was coated with copper-doped cadmium sulfide.
  • the cadmium sulfide was "sintered" onto the film at a temperature of 180 ° C. and a pressure of 49 bar / cm 2 .
  • the cadmium sulfide can also be applied by another method, for example from an emulsion.
  • a security thread consisting of a transparent PVC film with a width of 0.4 mm and a thickness of 25 ⁇ m was embedded in a banknote with a basis weight of 80 g / m 2 .
  • the security thread was coated with p-doped germanium. The doping was about 10 -15 cm -3 .
  • the coating was applied by means of sputtering. The coating can of course also be carried out using other methods which belong to the prior art, for example by thermal vapor deposition.
  • a magnetic field of approximately 0.6 Tesla perpendicular to the path of the electrical current was applied, the electrical resistance on the security thread increased by approximately 8%. This change in electrical conductivity is based on a deflection of the charge carriers carrying the current in the semiconductor substrate by the Lorentz force acting on them in the magnetic field. This lengthens the path of the charge carriers, which results in a change in resistance.
  • Card 1 (FIG. 1) was produced.
  • Card 1 consisted of an insert made of printed paper with embedded security thread 2 and two transparent cover foils. The security thread was visually freely accessible under the cover film.
  • the security thread consisted of a transparent PVC film with a width of 0.4 mm and a thickness of 25 ⁇ m.
  • the film was coated with polycrystalline cadmium sulfide.
  • the coating was applied by means of cathode-ray atomization. Of course, other methods of applying the coating belonging to the prior art are also possible.
  • the security thread was yellow in color.
  • Curve 3 represents the absorption edge of the cadmium sulfide without and curve 4 the absorption edge when an electric field is applied.
  • the reflectivity R decreases from point 5 to point 6 at the wavelength used for the measurement, which can be sharply delimited by filters .
  • the change in reflectivity is not limited to the absorption edge. Such changes can also be observed at certain other wavelengths in the reflection spectrum. The effect is particularly pronounced on the absorption edge.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Credit Cards Or The Like (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Paper (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Claims (11)

1. Procédé pour contrôler l'authenticité d'un titre de valeur portant un repère d'authenticité qui possède une propriété physique déterminée et qui modifie un premier champ en fonction de la grandeur de cette propriété physique, caractérisé en ce que la grandeur de la propriété physique est modifiée de son côté par un champ d'une autre nature, le premier champ étant modifié périodiquement par l'action simultanée du second champ sur le repère d'authenticité, en ce que la variation périodique du premier champ est déterminée et en ce que la concordance avec les valeurs d'un papier bancaire authentique à l'intérieur de limites de tolérances déterminées est utilisée comme critère d'authenticité.
2. Titre de valeur possédant un repère d'authenticité pour un contrôle d'authenticité selon la revendication 1, caractérisé en ce que le repère d'authenticité est formé d'un matériau qui possède une conductivité électrique déterminée variant dans le cas d'une irradiation optique en correspondance à l'intensité de la lumière.
3. Titre de valeur selon l'a revendication 2, caractérisé en ce que le repère d'authenticité est formé de sulfure de cadmium dopé au cuivre.
4. Titre de valeur possédant un repère d'authenticité pour un contrôle d'authenticité selon la revendication 1, caractérisé en ce que le repère d'authenticité est formé d'un matériau qui possède une conductivité électrique déterminée variant lors de l'action d'un champ magnétique en correspondance à l'intensité de ce champ magnétique.
5. Titre de valeur selon la revendication 4, caractérisé en ce que le repère d'authenticité est formé de germanium de conductivité p.
6. Titre de valeur possédant un repère d'authenticité pour un contrôle d'authenticité selon la revendication 1, caractérisé en ce que le repère d'authenticité est formé d'un matériau qui possède, notamment dans un domaine spectral optique, un pouvoir déterminé de réflexion qui varie, lors de l'action d'un champ électrique, en correspondance à l'intensité de ce champ.
7. Titre de valeur selon la revendication 6, caractérisé en ce que le repère d'authenticité est formé de sulfure de cadmium.
8. Titre de valeur selon la revendication 7, caractérisé en ce que le repère d'authenticité est placé sur ou dans un fil de sécurité.
9. Titre de valeur selon la revendication 8, caractérisé en ce que le repère d'authenticité est contenu dans la masse du papier.
10. Titre de valeur selon la revendication 9, caractérisé en ce que le repère d'authenticité est mélangé à l'encre d'impression.
11. Titre de valeur selon la revendication 10, caractérisé en ce que l'encre d'impression est une encre d'impression au tamis.
EP80103424A 1979-06-22 1980-06-19 Procédé pour vérifier un papier de valeur comportant une marque de securité et papier de valeur comprenant une telle marque Expired EP0021350B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80103424T ATE5351T1 (de) 1979-06-22 1980-06-19 Verfahren zur echtheitspruefung eines wertpapieres mit einem echtheitsmerkmal und wertpapier mit einem solchen merkmal.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2925273 1979-06-22
DE2925273A DE2925273C2 (de) 1979-06-22 1979-06-22 Wertpapier mit Sicherheitsfaden

Publications (2)

Publication Number Publication Date
EP0021350A1 EP0021350A1 (fr) 1981-01-07
EP0021350B1 true EP0021350B1 (fr) 1983-11-16

Family

ID=6073927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103424A Expired EP0021350B1 (fr) 1979-06-22 1980-06-19 Procédé pour vérifier un papier de valeur comportant une marque de securité et papier de valeur comprenant une telle marque

Country Status (5)

Country Link
US (1) US4609207A (fr)
EP (1) EP0021350B1 (fr)
JP (1) JPS5652476A (fr)
AT (1) ATE5351T1 (fr)
DE (2) DE2925273C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19703637A1 (de) * 1997-01-31 1998-08-06 Schwarz Druck Gmbh & Co Kg Werterzeugnis, Verfahren zur Echtheitsprüfung eines Werterzeugnisses sowie Einrichtung zur Durchführung des Verfahrens

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US4518919A (en) * 1981-01-16 1985-05-21 Tokyo Shibaura Denki Kabushiki Kaisha Detecting device for detecting a magnetic strip embedded in a sheet
DE3421041A1 (de) * 1984-06-06 1985-12-12 GAO Gesellschaft für Automation und Organisation mbH, 8000 München Sicherheitsdokumente und verfahren zur pruefung derselben
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DE3843077A1 (de) * 1988-12-21 1990-06-28 Gao Ges Automation Org Sicherheitselement in form von faeden oder baender zur einbettung in sicherheitsdokumente sowie verfahren zur herstellung und pruefung derselben
DE4041025C2 (de) * 1990-12-20 2003-04-17 Gao Ges Automation Org Magnetischer, metallischer Sicherheitsfaden mit Negativschrift
US5265916A (en) * 1992-03-19 1993-11-30 Moore Business Forms, Inc. Secure event tickets
US5279403A (en) * 1992-07-23 1994-01-18 Crane & Company, Inc. Microwave security thread detector
JPH0629921U (ja) * 1992-09-29 1994-04-19 オーエム工業株式会社 燃料タンクの逆流防止弁
US5599046A (en) * 1994-06-22 1997-02-04 Scientific Games Inc. Lottery ticket structure with circuit elements
US5475205A (en) * 1994-06-22 1995-12-12 Scientific Games Inc. Document verification system
US5471039A (en) * 1994-06-22 1995-11-28 Panda Eng. Inc. Electronic validation machine for documents
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US5639126A (en) * 1995-06-06 1997-06-17 Crane & Co., Inc. Machine readable and visually verifiable security threads and security papers employing same
GB9607788D0 (en) * 1996-04-15 1996-06-19 De La Rue Thomas & Co Ltd Document of value
EP0905657B1 (fr) 1997-09-23 2003-05-28 STMicroelectronics S.r.l. Billet de banque comportant un circuit integré
US6552290B1 (en) * 1999-02-08 2003-04-22 Spectra Systems Corporation Optically-based methods and apparatus for performing sorting coding and authentication using a gain medium that provides a narrowband emission
DE10111848A1 (de) * 2001-03-01 2002-09-12 Whd Elektron Prueftech Gmbh Sicherheitsmerkmale
AR080431A1 (es) 2010-03-03 2012-04-11 Sicpa Holding Sa Hilo o tira de seguridad que comprende particulas magneticas orientadas en tinta y procedimiento y medio para producir el mismo
CN104736346B (zh) 2012-08-01 2016-11-02 锡克拜控股有限公司 光学可变安全线和条
CA2880574A1 (fr) 2012-08-29 2014-03-06 Sicpa Holding Sa Fils et bandes de securite optiquement variables
US20160075166A1 (en) 2013-05-02 2016-03-17 Sicpa Holding Sa Processes for producing security threads or stripes
US10166808B2 (en) 2013-12-11 2019-01-01 Sicpa Holding Sa Optically variable security threads and stripes
CH709226B1 (de) 2014-02-03 2018-02-15 Daniel Rytz Dr Verfahren zur Bildung eines Fensters als Sicherheitsmerkmal und Objekt mit einem fluoreszierenden Fenster als Sicherheitsmerkmal.
WO2015121028A1 (fr) 2014-02-13 2015-08-20 Sicpa Holding Sa Fils et bandes de sécurité
PL2965920T3 (pl) 2014-07-09 2018-03-30 Sicpa Holding Sa Optycznie zmienne magnetyczne nitki zabezpieczające i paski
EP3917703A1 (fr) 2019-01-29 2021-12-08 Basf Se Élément de sécurité

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19703637A1 (de) * 1997-01-31 1998-08-06 Schwarz Druck Gmbh & Co Kg Werterzeugnis, Verfahren zur Echtheitsprüfung eines Werterzeugnisses sowie Einrichtung zur Durchführung des Verfahrens
DE19703637C2 (de) * 1997-01-31 2002-05-02 Schwarz Druck Gmbh & Co Kg Echtheitsprüfsystem
DE19703637C5 (de) * 1997-01-31 2004-09-30 Schwarz Druck Gmbh & Co Kg Echtheitsprüfsystem

Also Published As

Publication number Publication date
US4609207A (en) 1986-09-02
ATE5351T1 (de) 1983-12-15
JPS6337428B2 (fr) 1988-07-25
EP0021350A1 (fr) 1981-01-07
DE2925273C2 (de) 1981-09-17
JPS5652476A (en) 1981-05-11
DE3065598D1 (en) 1983-12-22
DE2925273B1 (de) 1981-01-29

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