EP0024053B1 - Method of testing the rate of soiling of record carriers - Google Patents
Method of testing the rate of soiling of record carriers Download PDFInfo
- Publication number
- EP0024053B1 EP0024053B1 EP80104790A EP80104790A EP0024053B1 EP 0024053 B1 EP0024053 B1 EP 0024053B1 EP 80104790 A EP80104790 A EP 80104790A EP 80104790 A EP80104790 A EP 80104790A EP 0024053 B1 EP0024053 B1 EP 0024053B1
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- EP
- European Patent Office
- Prior art keywords
- light
- contamination
- measuring
- degree
- banknote
- 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.)
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- 239000000969 carrier Substances 0.000 title claims 3
- 238000010998 test method Methods 0.000 title description 2
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000003595 spectral effect Effects 0.000 claims abstract description 9
- 238000011109 contamination Methods 0.000 claims description 13
- 239000000976 ink Substances 0.000 claims description 6
- 238000011156 evaluation Methods 0.000 claims 1
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 21
- 238000005259 measurement Methods 0.000 description 7
- 239000003086 colorant Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- G07D7/121—Apparatus characterised by sensor details
-
- 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
- G07D7/181—Testing mechanical properties or condition, e.g. wear or tear
Definitions
- the invention relates to a method for checking the degree of soiling of recording media, in particular banknotes, with the aid of a transceiver arrangement and evaluating the received measurement signals as a measure of the degree of soiling, the recording media being at least partially printed with colors that are invisible to light Spectral range are permeable.
- the determination of the degree of wear of banknotes is known from a large number of documents.
- unprinted areas of the banknote surface such as the edge (DE-A-23 10 882) or also unprinted areas within the banknote area (US-A-2, 950, 799) are used for testing. If unprinted areas on the banknote are not available or only to a sufficient extent, the check must be carried out within the printed image of the banknote. In contrast to the examination of unprinted areas, it must be taken into account that the light reaching the photodiodes is modulated by the print pattern present along the scanning track. In this connection, a test method is mentioned in DE-A-27 52 412, which u. a.
- the method delivers good results as long as the track used to form the standard signal is exactly adhered to in subsequent tests.
- the photodiode scans a more or less strongly changed print pattern in the vicinity of the original track, which inevitably leads to changes in the test level regardless of the contamination.
- the test level is therefore within a driving range when scanning several banknotes with the same contamination or with multiple scans of the same banknote or with multiple scans of the same banknote, so that a tightly tolerated assessment of the degree of soiling, which is divided into several stages, is excluded.
- the object of the invention is therefore to propose a method and a device for checking the degree of wear of banknotes, in which, even when checking in printed areas of the note, the test results of notes with the same contamination lie within wide limits regardless of track deviations within a narrow driving range.
- the object is achieved in a method of the type mentioned by the features specified in the characterizing part of the main claim.
- banknotes When designing securities and thus banknotes, several printing techniques are often used to increase security against falsification and counterfeiting. For example, in banknotes there are surface areas which are executed using the very complicated and complex steel intaglio printing technique, while other surface areas, for example for the design of background patterns, are printed using planographic printing technology.
- the test level can be kept within a narrow range even if there are deviations from the test track with the same contamination, but possibly with a different print pattern, and with a track deviation. Since the print pattern is eliminated, the test track can also lead from the unprinted area of a bank note into the printed area, which gives great flexibility in the selection of the test tracks of different bank notes.
- Testing within the invisible spectral range is not limited to the IR range.
- Printing inks that are translucent in other spectral ranges of the invisible spectrum can of course also be used for testing in the sense of the invention.
- Fig. 1 shows a banknote 1, the printed image is arranged so that a narrow edge of the note remains unprinted.
- the areas 2 which are hatched twice within the printed image - arranged randomly in this example - are printed with the corresponding colors impermeable to IR light.
- 4 is an indiscriminately selected test track, which alternately overflows with areas printed with IR-permeable and with IR-impermeable ink.
- the marked areas B i , B 2 or B 3 are basically suitable for checking dirt. However, it is sufficient to admit only one of the areas, for example B 2, for testing.
- test track runs partly in the completely unprinted area of the banknote. Even if the test device does not always scan a precisely adjusted test track due to mechanical inadequacies, the scatter of the measured values can be kept within narrow limits because the influence of the locally widely varying print image is eliminated and is generally evenly distributed in the contamination over large areas .
- FIG. 2 shows an example of a test device with which the method according to the invention can be carried out.
- the bank note 1 transported past the test device 7 in the direction of the arrow 6 is illuminated in the area of the test track with the aid of two tungsten lamps 8, which has a high IR component beyond the visible area.
- the light remitted from the banknote passes through a diaphragm 9 to a lens arrangement 12.
- a filter 10 is connected into the beam path of the optical system, which filter only allows the IR portion of the remitted light to reach a photodiode 15, which, in a known manner, produces the Changes lighting fluctuations due to contamination into corresponding electronically evaluable signals.
- the measurement signal which is modulated depending on the contamination, is summed up along the scanned area and the total values are compared with a target value after passing through the measurement track.
- Fig. 2 shows the possibility of decoupling the IR portion only on the receiver side.
- U. can be maintained to compensate for the influence of extraneous light.
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Prüfen des Verschmutzungsgrades von Aufzeichnungsträgern, insbesondere von Banknoten, mit Hilfe einer Sende-Empfangsanordnung und Auswertung der empfangenen Meßsignale als Maß für den Verschmutzungsgrad, wobei die Aufzeichnungsträger wenigstens teilweise mit Farben bedruckt sind, die für Licht in einem nicht sichtbaren Spektralbereich durchlässig sind.The invention relates to a method for checking the degree of soiling of recording media, in particular banknotes, with the aid of a transceiver arrangement and evaluating the received measurement signals as a measure of the degree of soiling, the recording media being at least partially printed with colors that are invisible to light Spectral range are permeable.
Die Bestimmung des Abnutzungsgrades von Banknoten ist aus einer Vielzahl von Schriften bekannt. Dabei werden in der Regel unbedruckte Bereiche der Banknoten-Oberfläche, wie beispielsweise der Rand (DE-A-23 10 882) oder auch unbedruckte Gebiete innerhalb der Banknotenfläche (US-A-2, 950, 799) zur Prüfung herangezogen. Sind unbedruckte Gebiete auf der Banknote nicht oder in nicht ausreichendem Maß vorhanden, muß die Prüfung innerhalb des Druckbildes der Banknote durchgeführt werden. Dabei ist im Gegensatz zur Untersuchung unbedruckter Gebiete zu berücksichtigen, daß das auf die Fotodioden gelangende Licht durch das entlang der Abtastspur vorhandene Druckmuster moduliert wird. In diesem Zusammenhang wird in der DE-A-27 52 412 ein Prüfverfahren erwähnt, das u. a. von dem Grundgedanken ausgeht, daß eine nicht verschmutzte Banknote entlang einer in bedruckten Bereichen verlaufenden Spur entsprechend dem vorhandenen Druckmuster eine bestimmte Anzahl von Kontrastsprüngen bestimmter Höhe aufweist, die entlang der Spur als Signalwerte aufsummiert der Bildung eines Standardsignals dienen. Ist eine Banknote verschmutzt, sinkt der Kontrast, so daß der bei dieser Note aufsummierte Prüfpegel je nach Verschmutzung mehr oder weniger stark von dem Standardpegel einer sauberen Note abweicht. Die Differenz kann als Maß für die Verschmutzung herangezogen werden.The determination of the degree of wear of banknotes is known from a large number of documents. As a rule, unprinted areas of the banknote surface, such as the edge (DE-A-23 10 882) or also unprinted areas within the banknote area (US-A-2, 950, 799) are used for testing. If unprinted areas on the banknote are not available or only to a sufficient extent, the check must be carried out within the printed image of the banknote. In contrast to the examination of unprinted areas, it must be taken into account that the light reaching the photodiodes is modulated by the print pattern present along the scanning track. In this connection, a test method is mentioned in DE-A-27 52 412, which u. a. is based on the basic idea that an uncontaminated banknote along a track running in printed areas has a certain number of contrast jumps of a certain height according to the existing print pattern, which are added up along the track as signal values to form a standard signal. If a banknote is dirty, the contrast drops, so that the test level added up on this note deviates more or less from the standard level of a clean note, depending on the degree of soiling. The difference can be used as a measure of the pollution.
Das Verfahren liefert gute Ergebnisse, solange die zur Bildung des Standardsignals herangezogene Spur auch bei nachfolgenden Prüfungen exakt eingehalten wird. Kommt es jedoch zu Abweichungen von der Spur, was grundsätzlich nicht immer vermeidbar ist, dann tastet die Fotodiode ein mehr oder weniger stark verändertes Druckmuster in der Umgebung der ursprünglichen Spur ab, was zwangsläufig unabhängig von der Verschmutzung zu Änderungen im Prüfpegel führt. Je nach Stärke der Abweichungen liegt der Prüfpegel daher bei der Abtastung mehrerer gleichverschmutzter Banknoten oder auch bei Mehrfachabtastungen derselben Banknote oder auch bei Mehrfachabtastungen derselben Banknote innerhalb eines Streibereiches, wodurch eine eng tolerierte und in mehrere Stufen unterteilte Beurteilung des Verschmutzungsgrades ausgeschlossen ist.The method delivers good results as long as the track used to form the standard signal is exactly adhered to in subsequent tests. However, if there are deviations from the track, which is fundamentally not always avoidable, the photodiode scans a more or less strongly changed print pattern in the vicinity of the original track, which inevitably leads to changes in the test level regardless of the contamination. Depending on the magnitude of the deviations, the test level is therefore within a driving range when scanning several banknotes with the same contamination or with multiple scans of the same banknote or with multiple scans of the same banknote, so that a tightly tolerated assessment of the degree of soiling, which is divided into several stages, is excluded.
Ein anderes Verfahren zur Prüfung des Abnutzungsgrades bzw. der Verschmutzung von Banknoten ist aus der US-A-3, 759, 382 bekannt. Hier wird das Transmissionsvermögen bestimmter Bereiche der Banknote im Spektralbereich des sichtbaren blauen Lichts gemessen. In diesem Spektralbereich soll die Zunahme der Opazität, die als Kriterium für den Verschmutzungsgrad dient, am ausgeprägtesten sein. Diese Messung kann jedoch sinnvoll nur in unbedruckten Bereichen der Banknote durchgeführt werden, da eine Messung im Druckbildbereich der Banknote aufgrund der durch die Druckfarben verursachten lokalen Schwankungen des Transmissionsvermögens das Meßsignal in unkontrollierter Weise verfälschen würde.Another method for checking the degree of wear or the contamination of banknotes is known from US-A-3, 759, 382. Here the transmittance of certain areas of the banknote is measured in the spectral range of visible blue light. The increase in opacity, which serves as a criterion for the degree of contamination, is said to be most pronounced in this spectral range. However, this measurement can only be sensibly carried out in unprinted areas of the banknote, since a measurement in the printed image area of the banknote would falsify the measurement signal in an uncontrolled manner due to the local fluctuations in the transmission capacity caused by the printing inks.
Die Aufgabe der Erfindung besteht deshalb darin, ein Verfahren bzw. eine Vorrichtung zur Prüfung des Abnutzungsgrades von Banknoten vorzuschlagen, bei dem auch bei der Prüfung in bedruckten Bereichen der Note die Prüfergebnisse gleich verschmutzter Noten in weiten Grenzen unabhängig von Spurabweichungen innerhalb eines engen Streibereichs liegen.The object of the invention is therefore to propose a method and a device for checking the degree of wear of banknotes, in which, even when checking in printed areas of the note, the test results of notes with the same contamination lie within wide limits regardless of track deviations within a narrow driving range.
Die Aufgabe wird bei einem Verfahren der eingangs genannten Art durch die im kennzeichnenden Teil des Hauptanspruchs angegebenen Merkmale gelöst.The object is achieved in a method of the type mentioned by the features specified in the characterizing part of the main claim.
Bei der Gestaltung von Wertpapieren und damit auch Banknoten wird häufig zur Erhöhung der Sicherheit gegen Verfälschung und Fälschung von mehreren Drucktechniken Gebrauch gemacht. So findet man beispielsweise bei Banknoten Flächenbereiche, die in der sehr komplizierten und aufwendigen Stahltiefdrucktechnik ausgeführt sind, während andere Flächenbereiche, beispielsweise zur Gestaltung von Hintergrundmustern, in Flachdrucktechnik bedruckt sind.When designing securities and thus banknotes, several printing techniques are often used to increase security against falsification and counterfeiting. For example, in banknotes there are surface areas which are executed using the very complicated and complex steel intaglio printing technique, while other surface areas, for example for the design of background patterns, are printed using planographic printing technology.
Bei der Untersuchung an Banknoten hat sich nun gezeigt, daß viele der verwendeten Farben für IR-Licht durchlässig sind. Außerdem hat sich gezeigt, daß Verschmutzungen bei der Bestrahlung mit IR-Licht gleiche optische Eigenschaften wie bei der Bestrahlung mit sichtbarem Licht zeigen.When examining banknotes, it has now been shown that many of the colors used are transparent to IR light. In addition, it has been shown that contamination when irradiated with IR light has the same optical properties as when irradiated with visible light.
Beleuchtet man eine Banknote an den mit IRdurchlässiger Farbe bedruckten Bereichen mit Licht, welches u. a. auch IR-Anteile enthält, filtert aber aus dem remittierten und auf die Fotodioden gelangenden Licht nur die IR-Anteile heraus, dann sind die Empfangssignale in der Regel weitgehend von der sich normalerweise im sichtbaren Licht durch das Druckmuster ergebenden Modulation befreit. Durch geschickte Wahl der Meßspuren kann der Prüfpegel auch bei Abweichungen von der Prüfspur bei gleicher Verschmutzung, aber ggf. unterschiedlichem Druckmuster, bei einer Spurabweichung in einem engen Streubereich gehalten werden. Da das Druckmuster eliminiert wird, kann die Prüfspur auch vom unbedruckten Bereich einer Banknote in den bedruckten Bereich führen, womit eine hohe Flexibilität in der Auswahl der Prüfspuren unterschiedlicher Banknoten gegeben ist.If you illuminate a banknote in the areas printed with IR-transmissive color with light, which u. a. also contains IR components, but if it only filters the IR components out of the remitted light that reaches the photodiodes, then the received signals are generally largely freed from the modulation that normally results in visible light from the print pattern. By skillfully selecting the measurement tracks, the test level can be kept within a narrow range even if there are deviations from the test track with the same contamination, but possibly with a different print pattern, and with a track deviation. Since the print pattern is eliminated, the test track can also lead from the unprinted area of a bank note into the printed area, which gives great flexibility in the selection of the test tracks of different bank notes.
Die Prüfung innerhalb des nicht sichtbaren Spektralbereichs ist nicht ausschließlich auf den IR-Bereich beschränkt. Druckfarben, die in anderen Spektralbereichen des nicht sichtbaren Spektrums lichtdurchlässig sind, können selbstverständlich auch im Sinne der Erfindung zur Prüfung herangezogen werden.Testing within the invisible spectral range is not limited to the IR range. Printing inks that are translucent in other spectral ranges of the invisible spectrum can of course also be used for testing in the sense of the invention.
Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der beigefügten Zeichnung beschrieben. Darin zeigen :
Figur 1 die stark schematisierte Aufteilung einer Banknoten-Oberfläche in IR-durchlässige und IR-undurchlässige Druckbereiche,Figur 2 die einfachste Ausführungsform einer Vorrichtung zur Prüfung von Banknoten gemäß der Fig. 1.
- FIG. 1 shows the highly schematic division of a banknote surface into IR-permeable and IR-impermeable printing areas,
- FIG. 2 shows the simplest embodiment of a device for checking banknotes according to FIG. 1.
Die Fig. 1 zeigt eine Banknote 1, deren Druckbild so angeordnet ist, daß ein schmaler Rand der Note unbedruckt bleibt. Die innerhalb des Druckbildes doppelt schraffierten Bereiche 2 - in diesem Beispiel wahllos angeordnet - seien mit den entsprechenden für IR-Licht undurchlässigen Farben bedruckt. Auf den verbleibenden Flächenbereichen 3, die in der Fig. einfach schraffiert sind, befindet sich ein Druckmuster dessen Druckfarben für IR-Licht durchlässig sind. Mit 4 sei eine wahllos herausgegriffene Prüfspur gekennzeichnet, die abwechselnd mit IR-durchlässiger und mit IR-undurchlässiger Farbe bedruckte Bereiche überläuft. Gemäß der Erfindung sind grundsätzlich die markierten Bereiche Bi, B2 oder B3 zur Schmutzprüfung geeignet. Dabei ist es jedoch ausreichend, nur einen der Bereiche, beispielsweise B2 zur Prüfung zuzulassen.Fig. 1 shows a
Die Prüfung ist aber durch entlang der anderen Bereiche (B1 + B2) möglich, obwohl die Prüfspur zum Teil im vollständig unbedruckten Bereich der Banknote verläuft. Auch wenn die Prüfvorrichtung aufgrund mechanischer Unzulänglichkeiten nicht immer exakt eine einmal einjustierte Prüfspur abtastet, kann die Streuung der Meßwerte innerhalb enger Grenzen gehalten werden, weil der Einfluß des u.U. örtlich stark variierenden Druckbildes eliminiert und in die Verschmutzung innerhalb größerer Flächenbereiche in der Regel gleichmäßig verteilt ist.The check is possible, however, along the other areas (B 1 + B 2 ), although the test track runs partly in the completely unprinted area of the banknote. Even if the test device does not always scan a precisely adjusted test track due to mechanical inadequacies, the scatter of the measured values can be kept within narrow limits because the influence of the locally widely varying print image is eliminated and is generally evenly distributed in the contamination over large areas .
Fig. 2 zeigt beispielhaft eine Prüfvorrichtung, mit der das erfindungsgemäße Verfahren durchführbar ist.FIG. 2 shows an example of a test device with which the method according to the invention can be carried out.
Die in Richtung des Pfeils 6 an der Prüfvorrichtung 7 vorbeitransportierte Banknote 1 wird im Bereich der Prüfspur mit Hilfe zweier Wolframlampen 8 mit Licht beleuchtet, welches über den sichtbaren Bereich hinaus einen hohen IR-Anteil aufweist. Das von der Banknote remittierte Licht gelangt über eine Blende 9 auf eine Linsenanordnung 12. In den Strahlengang des optischen Systems ist ein Filter 10 geschaltet, welches von dem remittierten Licht nur den IR-Anteil auf eine Fotodiode 15 gelangen läßt, die in bekannter Weise die Beleuchtungsschwankungen aufgrund von Verschmutzungen in entsprechende elektronisch auswertbare Signale umwandelt. Das abhängig von den Verschmutzungen modulierte Meßsignal wird entlang des abgetasteten Bereichs aufsummiert und die Summenwerte werden nach Durchlaufen der Meßspur mit einem Sollwert verglichen.The
Die Fig. 2 zeigt die Möglichkeit der Auskoppelung des IR-Anteils ausschließlich auf der Empfängerseite. Es ist je nach Anwendungsfall natürlich auch möglich, mit Hilfe handelsüblicher IR-Leuchtdioden die Prüffläche ausschließlich mit IR-Licht zu bestrahlen, wobei das Filter u. U. beibehalten werden kann um den Fremdlichteinfluß zu kompensieren.Fig. 2 shows the possibility of decoupling the IR portion only on the receiver side. Depending on the application, it is of course also possible to irradiate the test area exclusively with IR light using commercially available IR light-emitting diodes. U. can be maintained to compensate for the influence of extraneous light.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT80104790T ATE5552T1 (en) | 1979-08-14 | 1980-08-13 | METHOD OF TESTING THE CONTAMINATION DEGREE OF RECORD CARRIERS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2932962A DE2932962C2 (en) | 1979-08-14 | 1979-08-14 | Method for checking the degree of soiling of recording media, in particular bank notes |
| DE2932962 | 1979-08-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0024053A1 EP0024053A1 (en) | 1981-02-18 |
| EP0024053B1 true EP0024053B1 (en) | 1983-12-07 |
Family
ID=6078467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP80104790A Expired EP0024053B1 (en) | 1979-08-14 | 1980-08-13 | Method of testing the rate of soiling of record carriers |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4650319A (en) |
| EP (1) | EP0024053B1 (en) |
| JP (1) | JPS5633530A (en) |
| AT (1) | ATE5552T1 (en) |
| DE (1) | DE2932962C2 (en) |
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| KR890002004B1 (en) * | 1984-01-11 | 1989-06-07 | 가부시끼 가이샤 도오시바 | Distinction apparatus of papers |
| JPS6118844A (en) * | 1984-07-06 | 1986-01-27 | Glory Ltd | Apparatus for detecting contamination of circular article such as coin |
| GB2164442A (en) * | 1984-09-11 | 1986-03-19 | De La Rue Syst | Sensing the condition of a document |
| DE4002979A1 (en) * | 1990-02-01 | 1991-08-08 | Gao Ges Automation Org | Banknote with optically variable security elements - are transformed and pressed onto smooth surface to form hologram or relief pattern |
| GB2284292A (en) * | 1993-11-25 | 1995-05-31 | Secr Defence | Detection of counterfeit articles |
| JP4180715B2 (en) * | 1998-12-14 | 2008-11-12 | 株式会社東芝 | Device for determining the degree of contamination of printed matter |
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| DE102006053788A1 (en) * | 2006-11-15 | 2008-05-21 | Giesecke & Devrient Gmbh | Method for detecting contamination in the area of color transitions on value documents and means for carrying out the method |
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|---|---|---|---|---|
| US2731621A (en) * | 1952-04-01 | 1956-01-17 | Cgs Lab Inc | Counterfeit detector |
| GB1187451A (en) * | 1966-05-26 | 1970-04-08 | Mitsubishi Heavy Ind Ltd | Method of and Apparatus for Comparing Printing of Test and Model Articles |
| US3491243A (en) * | 1966-08-26 | 1970-01-20 | Taisuke Tsugami | Authentication apparatus to measure color characteristics of paper documents |
| US3759382A (en) * | 1971-09-16 | 1973-09-18 | Pitney Bowes Inc | Method, apparatus and system for fitness sorting and count verifying straps of currency |
| AT311097B (en) * | 1972-03-21 | 1973-10-25 | Gao Ges Automation Org | Method for measuring the degree of soiling of banknotes or the like. |
| JPS5017895A (en) * | 1973-06-06 | 1975-02-25 | ||
| US3916194A (en) * | 1974-01-07 | 1975-10-28 | Ardac Inc | Infrared note validator |
| US3922557A (en) * | 1974-04-02 | 1975-11-25 | Pitney Bowes Inc | Apparatus for the optical examination of articles |
| US3976198A (en) * | 1974-04-02 | 1976-08-24 | Pitney-Bowes, Inc. | Method and apparatus for sorting currency |
| CH573634A5 (en) * | 1974-07-04 | 1976-03-15 | Landis & Gyr Ag | |
| DE2440550C3 (en) * | 1974-08-21 | 1980-10-09 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Switch for auxiliary circuits |
| JPS5429397B2 (en) * | 1975-01-23 | 1979-09-22 | ||
| JPS51132574A (en) * | 1975-05-12 | 1976-11-17 | Toshiba Corp | Device for handling paper sheet group |
| JPS5211992A (en) * | 1975-07-18 | 1977-01-29 | Oki Electric Ind Co Ltd | Note identifying equipment |
| IT1068657B (en) * | 1976-11-03 | 1985-03-21 | Nuovo Pignone Spa | PERFECTED METHOD FOR CHECKING BANKNOTES AND EQUIPMENT TO MAKE IT |
| US4147430A (en) * | 1976-11-10 | 1979-04-03 | Ardac, Inc. | Secondary detection system for security validation |
| AT349248B (en) * | 1976-11-29 | 1979-03-26 | Gao Ges Automation Org | PROCEDURE FOR DYNAMIC MEASUREMENT OF THE DEGREE OF CONTAMINATION OF BANKNOTES AND TESTING DEVICE FOR PERFORMING THIS PROCESS |
-
1979
- 1979-08-14 DE DE2932962A patent/DE2932962C2/en not_active Expired
-
1980
- 1980-08-13 EP EP80104790A patent/EP0024053B1/en not_active Expired
- 1980-08-13 AT AT80104790T patent/ATE5552T1/en not_active IP Right Cessation
- 1980-08-14 JP JP11225880A patent/JPS5633530A/en active Granted
-
1985
- 1985-10-08 US US06/786,154 patent/US4650319A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0024053A1 (en) | 1981-02-18 |
| DE2932962C2 (en) | 1982-04-08 |
| US4650319A (en) | 1987-03-17 |
| JPH0325837B2 (en) | 1991-04-09 |
| ATE5552T1 (en) | 1983-12-15 |
| DE2932962A1 (en) | 1981-02-26 |
| JPS5633530A (en) | 1981-04-04 |
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