EP0543200B1 - Coin tester - Google Patents
Coin tester Download PDFInfo
- Publication number
- EP0543200B1 EP0543200B1 EP92118682A EP92118682A EP0543200B1 EP 0543200 B1 EP0543200 B1 EP 0543200B1 EP 92118682 A EP92118682 A EP 92118682A EP 92118682 A EP92118682 A EP 92118682A EP 0543200 B1 EP0543200 B1 EP 0543200B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coin
- magnetic coil
- coil
- edge
- magnetic
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 6
- 238000013459 approach Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 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
- G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
- G07D5/08—Testing the magnetic or electric properties
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
- G07D5/10—Testing the rim, e.g. the milling of the rim
Definitions
- the invention relates to a coin validator according to the preamble of claim 1.
- Electronic coin validators mainly work with inductive and / or optical probes.
- a magnet coil is usually part of an oscillator, and its magnetic field interacts with the coin rolling along the coin path. This results in damping of the oscillator circuit with corresponding changes in amplitude, frequency and phase position.
- the frequency or phase change is used to measure the measured value to compare a target value so that, if necessary, a false certificate or an impermissible foreign coin is eliminated.
- a coin validator has become known with a coin channel which has an approximately vertical section.
- a magnetic coil is assigned to this section, which is held by a holding device which is attached to the track carrier.
- the holding device enables the yoke of the magnetic coil to be adjusted into or away from the coin channel in order to adapt to different coin sizes.
- the magnetic field is directed so that it is approximately perpendicular to the coin surfaces in the edge area of the coins.
- Optical sensors work as a light barrier, which is crossed by the rolling coin.
- optical sensors are also known which detect the light reflected by a coin, for example for determining a specific coin edge, such as knurling.
- the diameter of the coins is a typical parameter.
- Optical and inductive sensors are also used for diameter measurement.
- the effective coil area is aimed at the embossing and the covered area is evaluated.
- the nature of the material is naturally also included in the measured value, depending on the choice of frequency.
- a different or larger diameter of the disc to be tested can be simulated.
- the coin passes through at least two or more photo galleries or light barriers, and the times which pass from the passage of one route to the passage of the other route are determined, since these times represent an indicator of the diameter.
- the magnetic coil is arranged below the coin track so that the magnetic field interacts with the coin edge.
- the direction of the main field of the magnetic coil or the effective coil surface is arranged such that the magnetic field direction is perpendicular to the coin edge.
- the coin edge is therefore “viewed” in a targeted manner.
- the frequency is chosen so that the magnetic field penetrates the material of the coin.
- a so-called skin effect is obtained from a certain frequency, in which the magnetic field no longer penetrates significantly into the material of the coin. If a low frequency is selected, a more or less deep penetration takes place instead, so that the material of the coin is also recorded.
- the coin rim now consists of non-magnetic material, this results in a relatively large air gap between the material adapted to the real coin and the magnetic coil, which has a corresponding effect on the damping. If the coin edge of the coin to be checked has been turned off, this leads to a more intensive interrelation between the coil and the coin material compared to a knurled coin, which can also be detected.
- the shape of the edge of the coin, the material of the edge of the coin, its thickness and its knurling are detected, so that a large number of manipulated disks and coins can be discriminated.
- the magnetic coil is sunk in a lateral approach of the track carrier.
- the magnetic coil in a lateral opening of the lateral extension are inserted, whereby according to a further embodiment of the invention it projects beyond the free end of the extension and protrudes into a recess in the main plate. It is thereby achieved that the axis of the effective coil surface lies approximately in the center plane of the coin channel, the bottom of which is delimited by the raceway.
- Fig. 1 shows schematically the side view of a coin validator according to the invention.
- Fig. 2 shows a section through the representation of Fig. 1 along the line 2-2.
- a coin validator not shown, has a track 10 on which a coin 12 rolls.
- a magnet coil 14 with a winding 16 is arranged below the track. From the winding 16 it can be seen that the effective coil surface is turned towards the edge of the coin 12.
- Fig. 2 From Fig. 2 it can be seen that the coil 14 in one lateral approach 18 of a track carrier 20 is arranged, which is attached to a main plate 22.
- the track carrier 20 is normally articulated and can be pivoted away from the main plate 22.
- the coil 14 extends beyond the free end of the extension 18 and engages in a recess in the main plate 22.
- the axis of the effective coil surface is approximately in the center plane of the channel, which is formed by the raceway carrier 20, the main plate 22 and the raceway 10.
- the coil 14 is part of an oscillator, not shown, the parameters of which change when a coin approaches the coil 14.
- the oscillating circuit of the oscillator is damped, which can be detected with the aid of a suitable evaluation circuit, also not shown.
- the magnetic field vibrating at a certain frequency interacts with the edge of the coin 12, so that it can be detected whether the edge is knurled or not or consists of a non-conductive or non-magnetic material.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Coins (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Description
Die Erfindung bezieht sich auf einen Münzprüfer nach dem Oberbegriff des Anspruchs 1.The invention relates to a coin validator according to the preamble of claim 1.
Elektronische Münzprüfer arbeiten vorwiegend mit induktiven und/oder optischen Sonden. Bei der induktiven Sonde ist eine Magnetspule üblicherweise Bestandteil eines Oszillators, und ihr Magnetfeld tritt in Wechselwirkung mit der auf der Münzlaufbahn entlangrollenden Münze. Dadurch erfolgt eine Dämpfung des Oszillatorschwingkreises mit entsprechenden Änderungen von Amplitude, Frequenz und Phasenlage. Normalerweise wird die Frequenz- bzw. die Phasenänderung ausgenutzt, um den gemessenen Wert mit einem Sollwert zu vergleichen, damit erforderlichenfalls ein Falsifikat oder eine unzulässige Fremdmünze ausgeschieden wird.Electronic coin validators mainly work with inductive and / or optical probes. In the inductive probe, a magnet coil is usually part of an oscillator, and its magnetic field interacts with the coin rolling along the coin path. This results in damping of the oscillator circuit with corresponding changes in amplitude, frequency and phase position. Usually the frequency or phase change is used to measure the measured value to compare a target value so that, if necessary, a false certificate or an impermissible foreign coin is eliminated.
Aus der DE-A-2 120 053 ist ein Münzprüfer bekanntgeworden mit einem Münzkanal, der einen annähernd vertikal verlaufenden Abschnitt aufweist. Diesem Abschnitt ist eine Magnetspule zugeordnet, die von einer Haltevorrichtung gehalten ist, die am Laufbahnträger angebracht ist. Die Haltevorrichtung ermöglicht eine Verstellung des Joches der Magnetspule in den Münzkanal hinein bzw. davon fort, um eine Anpassung an unterschiedliche Münzgrößen zu erreichen. Das Magnetfeld ist so gerichtet, daß es im Randbereich der Münzen annähernd senkrecht auf den Münzflächen steht.From DE-A-2 120 053 a coin validator has become known with a coin channel which has an approximately vertical section. A magnetic coil is assigned to this section, which is held by a holding device which is attached to the track carrier. The holding device enables the yoke of the magnetic coil to be adjusted into or away from the coin channel in order to adapt to different coin sizes. The magnetic field is directed so that it is approximately perpendicular to the coin surfaces in the edge area of the coins.
Optische Sensoren arbeiten als Lichtschranke, die von der vorbeirollenden Münze durchquert wird. Es sind jedoch auch optische Sensoren bekannt, welche das von einer Münze reflektierte Licht erfassen, beispielsweise zur Bestimmung eines spezifischen Münzrandes, wie etwa einer Rändelung.Optical sensors work as a light barrier, which is crossed by the rolling coin. However, optical sensors are also known which detect the light reflected by a coin, for example for determining a specific coin edge, such as knurling.
Neben der Materialbeschaffenheit ist auch der Durchmesser der Münzen eine typische Meßgröße. Optische und induktive Sensoren werden auch zur Durchmessermessung eingesetzt. Bei der induktiven Messung ist die wirksame Spulenfläche auf die Prägung gerichtet, und es wird die abgedeckte Fläche ausgewertet. Bei diesem bekannten Verfahren geht in den Meßwert naturgemäß je nach Wahl der Frequenz auch die Materialbeschaffenheit mit ein. So kann durch ein anderes Material der zu prüfenden Scheibe ein größerer oder kleinerer Durchmesser simuliert werden. Bei der optischen Erfassung durchläuft die Münze mindestens zwei oder mehr Fotostrecken oder Lichtschranken, und es werden die Zeiten ermittelt, die vom Durchlauf einer Strecke bis zum Durchlauf der anderen Strecke vergehen, da diese Zeiten einen Indikator für den Durchmesser darstellen.In addition to the quality of the material, the diameter of the coins is a typical parameter. Optical and inductive sensors are also used for diameter measurement. In the case of inductive measurement, the effective coil area is aimed at the embossing and the covered area is evaluated. In this known method, the nature of the material is naturally also included in the measured value, depending on the choice of frequency. A different or larger diameter of the disc to be tested can be simulated. In the case of optical detection, the coin passes through at least two or more photo galleries or light barriers, and the times which pass from the passage of one route to the passage of the other route are determined, since these times represent an indicator of the diameter.
Es existieren viele Fremdmünzen mit einem relativ geringen Wert, die aus ähnlichem Material wie die anzunehmenden Münzen gefertigt sind und außerdem annähernd die gleiche Dicke und den gleichen Durchmesser aufweisen. Durch einfache Manipulationen am Münzrand lassen sich derartige Münzen auf den "richtigen" Durchmesser bringen. Dies kann zum Beispiel durch Aufkleben einer Kunststofffolie erfolgen. Alternativ kann ein Ring aus Kunststoff, Pappe oder dergleichen auf die Münze aufgeschoben werden. Derartige Falsifikate können naturgemäß optisch nicht diskriminiert werden, denn die optischen Sensoren arbeiten materialunabhängig. Auch die induktiven Messungen führen nicht zum Ziel. Der geringfügige nicht metallische Anteil der Falschmünze kann in aller Regel nicht erkannt werden. Darüber hinaus ist es möglich, mit Hilfe einer Metallfolie das gewünschte echte Signal zu erzeugen.There are many foreign coins with a relatively low value, which are made of a similar material as the coins to be accepted and also have approximately the same thickness and the same diameter. By simple manipulations at the edge of the coin, such coins can be brought to the "correct" diameter. This can be done, for example, by gluing on a plastic film. Alternatively, a ring made of plastic, cardboard or the like can be pushed onto the coin. Such false certificates cannot naturally be optically discriminated against, because the optical sensors work regardless of the material. The inductive measurements also do not lead to the goal. The minor non-metallic part of the counterfeit coin can usually not be recognized. In addition, it is possible to generate the desired real signal using a metal foil.
Bei Fremdmünzen mit einem größeren Durchmesser kann dieser durch Abdrehen oder Schleifen auf die "richtige" Größe gebracht werden. Derartige manipulierte Münzen haben keine Rändelung. Da die eingesetzten induktiven Sensoren integrierend arbeiten, lassen sich die Rändelungen durch gezielte Maßtoleranzen simulieren.For foreign coins with a larger diameter, this can be brought to the "correct" size by turning or grinding. Such manipulated coins have no knurling. Since the inductive sensors used work integrally, the knurling can be simulated through targeted dimensional tolerances.
Daher liegt der Erfindung die Aufgabe zugrunde, einen Münzprüfer zu schaffen, mit dem auch solche Falsifikate erkannt werden können, die sich im Hinblick auf das Material und ggf. die Dicke nur geringfügig von echten Münzen unterscheiden und die durch unterschiedliche Manipulationen im Durchmesser der echten Münze angepaßt sind.It is therefore the object of the invention to provide a coin validator with which it is also possible to detect falsifications which differ only slightly from real coins in terms of material and possibly thickness and which are manipulated in the diameter of the real coin by different manipulations are adjusted.
Diese Aufgabe wird erfindungsgemäß gelöst durch das Merkmal des Anspruchs 1.According to the invention, this object is achieved by the feature of claim 1.
Bei dem erfindungsgemäßen Münzprüfer ist die Magnetspule unterhalb der Münzlaufbahn so angeordnet, daß das Magnetfeld mit dem Münzrand zusammenwirkt. Insbesondere ist die Richtung des Hauptfelds der Magnetspule bzw. die wirksame Spulenfläche so angeordnet, daß die Magnetfeldrichtung senkrecht zum Münzrand verläuft. Mit Hilfe einer derartigen induktiven Sonde wird mithin gezielt der Münzrand "betrachtet". Die Frequenz ist so gewählt, daß das Magnetfeld in das Material der Münze eindringt. Bekanntlich wird ab einer bestimmten Frequenz ein sogenannter Skineffekt erhalten, bei dem das Magnetfeld nicht mehr wesentlich in das Material der Münze eindringt. Wird eine niedrige Frequenz gewählt, findet ein mehr oder weniger tiefes Eindringen statt, so daß auch das Material der Münze erfaßt wird. Besteht nun der Münzrand aus unmagnetischem Material ergibt sich dadurch ein relativ großer Luftspalt zwischen dem der echten Münze angepaßten Material und der Magnetspule, was eine entsprechende Auswirkung auf die Dämpfung nach sich zieht. Ist bei der zu prüfenden Münze der Münzrand abgedreht worden, führt dies gegenüber einer gerändelten Münze zu einer intensiveren Wechselbeziehung zwischen Spule und Münzmaterial, was ebenfalls detektiert werden kann.In the coin validator according to the invention, the magnetic coil is arranged below the coin track so that the magnetic field interacts with the coin edge. In particular, the direction of the main field of the magnetic coil or the effective coil surface is arranged such that the magnetic field direction is perpendicular to the coin edge. With the aid of such an inductive probe, the coin edge is therefore “viewed” in a targeted manner. The frequency is chosen so that the magnetic field penetrates the material of the coin. As is known, a so-called skin effect is obtained from a certain frequency, in which the magnetic field no longer penetrates significantly into the material of the coin. If a low frequency is selected, a more or less deep penetration takes place instead, so that the material of the coin is also recorded. If the coin rim now consists of non-magnetic material, this results in a relatively large air gap between the material adapted to the real coin and the magnetic coil, which has a corresponding effect on the damping. If the coin edge of the coin to be checked has been turned off, this leads to a more intensive interrelation between the coil and the coin material compared to a knurled coin, which can also be detected.
Mit Hilfe der erfindungsgemäßen Maßnahme wird mithin die Form des Münzrandes, das Material des Münzrandes, seine Dicke und seine Rändelung erfaßt, so daß eine große Anzahl manipulierter Scheiben und Münzen diskriminiert werden kann.With the help of the measure according to the invention, the shape of the edge of the coin, the material of the edge of the coin, its thickness and its knurling are detected, so that a large number of manipulated disks and coins can be discriminated.
Es versteht sich, daß die erfindungsgemäß gewählte Anordnung eines induktiven Sensors auch mit anderen Sensoren kombiniert werden kann, um eine noch größere Prüfsicherheit zu erhalten.It goes without saying that the arrangement of an inductive sensor selected according to the invention can also be combined with other sensors in order to obtain even greater test reliability.
Bei der Erfindung ist die Magnetspule in einem seitlichen Ansatz des Laufbahnträgers versenkt angeordnet. Beispielsweise kann die Magnetspule in eine seitliche Öffnung des seitlichen Ansatzes eingeschoben werden, wobei sie nach einer weiteren Ausgestaltung der Erfindung über das freie Ende des Ansatzes hinaussteht und in eine Ausnehmung der Hauptplatte hineinragt. Dadurch wird erreicht, daß die Achse der wirksamen Spulenfläche annähernd in der Mittenebene des Münzkanals liegt, dessen Boden von der Laufbahn begrenzt wird.In the invention, the magnetic coil is sunk in a lateral approach of the track carrier. For example, the magnetic coil in a lateral opening of the lateral extension are inserted, whereby according to a further embodiment of the invention it projects beyond the free end of the extension and protrudes into a recess in the main plate. It is thereby achieved that the axis of the effective coil surface lies approximately in the center plane of the coin channel, the bottom of which is delimited by the raceway.
Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand von Zeichnungen näher erläutert.An embodiment of the invention is explained below with reference to drawings.
Fig. 1 zeigt schematisch die Seitenansicht eines Münzprüfers nach der Erfindung.Fig. 1 shows schematically the side view of a coin validator according to the invention.
Fig. 2 zeigt einen Schnitt durch die Darstellung nach Fig. 1 entlang der Linie 2-2.Fig. 2 shows a section through the representation of Fig. 1 along the line 2-2.
Ein nicht näher dargestellter Münzprüfer weist eine Laufbahn 10 auf, auf der entlang eine Münze 12 rollt. Unterhalb der Laufbahn ist eine Magnetspule 14 angeordnet mit einer Wicklung 16. Aus der Wicklung 16 ist zu erkennen, daß die wirksame Spulenfläche dem Rand der Münze 12 zugekehrt ist.A coin validator, not shown, has a
Aus Fig. 2 ist zu erkennen, daß die Spule 14 in einem seitlichen Ansatz 18 eines Laufbahnträgers 20 angeordnet ist, der an einer Hauptplatte 22 angebracht ist. Der Laufbahnträger 20 ist normalerweise angelenkt und kann von der Hauptplatte 22 fort verschwenkt werden. Wie erkennbar, reicht die Spule 14 über das freie Ende des Ansatzes 18 hinaus und greift in eine Ausnehmung der Hauptplatte 22 ein. Dadurch ist die Achse der wirksamen Spulenfläche etwa in der Mittenebene des Kanals, der durch den Laufbahnträger 20, die Hauptplatte 22 und die Laufbahn 10 gebildet ist.From Fig. 2 it can be seen that the
Die Spule 14 ist Bestandteil eines nicht gezeigten Oszillators, dessen Parameter sich bei Annäherung einer Münze an die Spule 14 ändert. Der Schwingkreis des Oszillators erfährt eine Dämpfung, die mit Hilfe einer geeigneten, ebenfalls nicht gezeigten Auswerteschaltung erfaßt werden kann. Das mit einer bestimmten Frequenz schwingende Magnetfeld wirkt mit dem Rand der Münze 12 zusammen, so daß detektiert werden kann, ob der Rand gerändelt ist oder nicht oder aus einem nicht leitenden oder unmagnetischen Werkstoff besteht.The
Claims (2)
- A coin-testing device comprising a coin passage way including a coin runway (10), an A.C. operated magnetic coil (14) associated thereto which magnetic field coacts with the coin edge, and a processing circuit for determining variations of the A.C. voltage in the magnetic coil (14) and comparing the determined value with at least a desired value, wherein the frequency of the A.C. voltage is selected such that the magnetic field of the magnetic coil (14) penetrates the material of the coin (12), characterized in that the magnetic coil (14) is located below the coin runway (10) in a side projection (18) of a runway support (20) in an embedded fashion such that the main field of the magnetic coil (14) extends approximately vertical to the coin edge.
- The coin-testing device of claim 1, characterized in that the magnetic coil (14) extends beyond the free end of the projection (18) into a recess of a main plate (22).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9114313U | 1991-11-16 | ||
| DE9114313U DE9114313U1 (en) | 1991-11-16 | 1991-11-16 | Coin acceptor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0543200A1 EP0543200A1 (en) | 1993-05-26 |
| EP0543200B1 true EP0543200B1 (en) | 1996-01-03 |
Family
ID=6873375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92118682A Expired - Lifetime EP0543200B1 (en) | 1991-11-16 | 1992-10-31 | Coin tester |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0543200B1 (en) |
| DE (2) | DE9114313U1 (en) |
| ES (1) | ES2082328T3 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2127150B1 (en) * | 1997-07-29 | 1999-11-16 | Azkoyen Ind Sa | METHOD FOR THE IDENTIFICATION OF DISCOIDAL METAL PARTS WITH A CENTRAL HOLE. |
| CN101819693A (en) * | 2010-04-23 | 2010-09-01 | 南开大学 | Intelligent coin currency value detecting system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2120053A1 (en) * | 1971-04-23 | 1972-11-09 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Coin channel detector |
| DE2825094A1 (en) * | 1978-06-08 | 1979-12-13 | Nat Rejectors Gmbh | Detector for coins with knurled edge - has vibratory detector excited by knurled edges as well as detector stage for type of material |
| DE3014792A1 (en) * | 1980-04-17 | 1981-10-22 | Nsm-Apparatebau Gmbh & Co Kg, 6530 Bingen | Object identification sensor and circuit - has inductive sensor coupled to amplitude and phase shift detection circuit |
| JPS5958595A (en) * | 1982-09-28 | 1984-04-04 | 富士電機株式会社 | Coin selector |
| DE3605802C2 (en) * | 1986-02-22 | 1997-10-16 | Nsm Ag | Method for checking coins and coin validator for carrying out the method |
| JPS62241092A (en) * | 1986-03-14 | 1987-10-21 | 武蔵エンジニアリング株式会社 | Coin discriminating machine |
| DE9202944U1 (en) * | 1992-03-06 | 1992-06-11 | National Rejectors Inc. Gmbh, 2150 Buxtehude | Sensor combination for checking coins in a coin validator |
-
1991
- 1991-11-16 DE DE9114313U patent/DE9114313U1/en not_active Expired - Lifetime
-
1992
- 1992-10-31 EP EP92118682A patent/EP0543200B1/en not_active Expired - Lifetime
- 1992-10-31 DE DE59204919T patent/DE59204919D1/en not_active Expired - Lifetime
- 1992-10-31 ES ES92118682T patent/ES2082328T3/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE59204919D1 (en) | 1996-02-15 |
| EP0543200A1 (en) | 1993-05-26 |
| DE9114313U1 (en) | 1993-03-18 |
| ES2082328T3 (en) | 1996-03-16 |
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