EP2804768A1

EP2804768A1 - Coin and method for producing a coin

Info

Publication number: EP2804768A1
Application number: EP13700687.0A
Authority: EP
Inventors: Wolfgang Bretz
Original assignee: Wickeder Westgalenstahl GmbH
Current assignee: AUERHAMMER METALLWERK GmbH
Priority date: 2012-01-17
Filing date: 2013-01-14
Publication date: 2014-11-26
Also published as: WO2013107715A1; KR20140113725A; DE102012006233A1; JP2015516176A; JP6270737B2; RU2667583C2; WO2013107715A8; RU2014128240A; CN104053556A; HK1202098A1; US20140345173A1; DE102012006233B4; US9241548B2

Abstract

Coin, medal or casino token with a first side and a second side, comprising at least one first layer (1) made of a first material and at least one second layer (2) made of a second material, wherein the first layer (1) is between 10 µm and 90 µm, preferably 20 µm thick. The invention further relates to a method for producing a coin wherein the coin is produced, more particularly punched, from a plated sheet-like composite material, and to a method for producing a coin wherein the coin is formed from a ring (5) and a core (4) arranged inside the ring, wherein the core and the ring are punched from a plated sheet-like composite material and subsequently the core (4) is inserted rotated into the ring (5) and is fixed therein.

Description

Coin, and method of making a coin

The present invention relates to a coin, medal or a casino token according to the preamble of claim 1, as well as a method for producing a coin, medal or a casino token according to claim 14 and / or 15. For the sake of simplicity, only one of them "Coin" spoken.

Coins - especially high-value denominations - are subject to the constant danger of being forged. Therefore, the endeavor is to provide coins with features that are high

Possess counterfeit security. This happens on the one hand by the selection of so-called coin materials, which are mainly used for coin production - such. B. CuNi 25 or Nordic Gold - and thus on the open market is not or only with difficulty freely available; on the other by optical unmistakable features such as edge education & margin inscriptions, embossed images and relief or as Bicolorversionen. In addition to the aforementioned properties are in Münzprüfer - in addition to weight and dimensions - in particular the

Electromagnetic properties frequency-dependent, so far unilaterally tested by a sensor. As a measure of the reliable detectability of the coins in electronic coin validators is spoken by machine verifiability or automatic security. The coins can be made of solid material or a multilayer material. The different layers can be produced by electroplating or plating. Galvanic coins usually consist of a mild steel core on which metals or alloys are deposited symmetrically. A single layer with layer thicknesses of approx. 25μιη. But there are also two-ply layers. However, galvanic products have the disadvantage that the layer thicknesses increase over the diameter of the center to the edge by the deposition kinetics (bone profile) and additionally the steel core in the coin validator can dominate in terms of electromagnetic properties, ie the run lengths are considered too low.

Better usable signal properties are expected from about 100 μιη, preferably layer thicknesses> 300 μιη are desired in terms of reliable automatability. Overall, the automatic security of galvanic coins is very severely limited and beyond the counterfeit security by the worldwide availability of numerous galvanics in addition

limited.

Improved automatic security, however, offer plated coins. On the one hand, the layer thickness is constant over the

Diameter - this can be used to restrict the measuring window of the test sensors accordingly. On the other hand, the

Layer thickness tailored to the requirements

Layer thicknesses> 10 μιη be adjusted. Usually, the layer structure is 3-ply symmetrical - as in the case of the cores of the "1" and "2" euro coins. However, there are also known 5-ply coins of symmetrical construction. In addition, further layers are conceivable - so-called multiple clad coins. These can have additional layers by means of galvanic processes, wherein the structure can be symmetrical as well as asymmetrical and

theoretically range from 2 to an infinite number of layers. These multi-layered products can - as in the case of the "1" and "2" Euronominals - be manufactured as bi-color coins (two-color coin); ie, the coin is composed of two stamped parts, whose outer ring consists of a perforated disc, in which a further punching - the core - is used. The

Joining method of the aforementioned coins is already known for example from US 632938A.

The decisive feature is - in addition to the multi-layered

Core material in the case of "1" and "2" euro coins - the optical security feature: ring and core made of different materials that differ in color: bicolour. State of the art is to provide mild steel rings and mild steel cores galvanically colored with different metallic coatings and thus to produce correspondingly cost-effective Bicolor coins. Examples include 50 Gopik from Azerbaijan, 100 francs from Rwanda or 1 Cedi from Ghana. Even for these coins, however, a limited automatic security applies. However, the leaves can be

Reduce scrap rate to the extent that the punched-out inner part of the ring is the basis of another electroplating process and is later joined with the likewise differently colored coated ring. Such a method is described for example in DE 403578 A1.

Logistically, the production of clad bi-color coins according to the prior art is complex and associated with high costs, since ring and core are produced from two different materials. In addition, next to the punched scrap of the falls

Core material also the punching scrap of the ring material.

In addition, the punched scrap is still the punching of the

Ring material available. In total, this can result in scrap rates of more than 100%. Although the use of the

punched inner ring material used in different countries for lower nominal value, but this is in terms of Counterfeit security not recommended, since this can automatically be linked to the falsification of another nominal.

It is desirable, first the scrap rates of

To reduce bicolor coin production. This has already been done

Turning coins - the so-called flip-flop coins - proposed.

This coin was characterized by the fact that the first side and the second side of plated bands of different

Metals / alloys exist that differ in color. For this reason, it is also possible to speak of bicoloured coins in these coins. Basically, the different colors could also be unilateral

Electroplating, or other application of components produce.

Connected diffusion treatments then allow the formation of alloys that allow corresponding color designs. Conceivable here would be the deposition of zinc on copper and the subsequent formation of brass.

The further production of the turning coin then consists of inserting the punched-out core material of the plating composite back into the ring and adding it. This creates a coin that is colored on one side on the ring the color of the core of the

Opposite side - and vice versa. This represents an optical

Security feature dar. Also the edge can recognize the colors of the different alloys. This edge feature is described for 3-layer cladding as a security feature, for example, already in DE 390318 A.

The joining process of the turning coins is machine with

Speeds of "normal" Bicolor production representable.

Another feature is the different colors of the front and back with respect to the ring and the core as optical Safety feature. In addition, the border reflects the color aspects of the individual plating components.

It can be seen so far that coins, apart from the edge of the coin, have two sides or surfaces. The two sides or each side can or may respectively

be formed of different materials, with basically any number or no further layers between the aforementioned surfaces may be present.

In the conventional two- or multi-layered coins, the first side may be formed entirely of a first material and the second side may be formed entirely of a second material, with the first material correspondingly different from the second material.

Bicolor coins are coins made up of a ring and a core. The ring is usually solid material, the core can - as in the case of the "1" and "2" euro coins are plated. The term Bicolor thus refers to the differences in color regarding the consideration of one and the same page. In this respect, conventional bicolour coins result in different material combinations per side. The

Material combination is the same on both sides. Also

Bicolour coins can be single or multi-layered.

In the Bicolorwenderünzen the sides of the coin are each formed in sections by the core and the ring. In this respect, by the rotated core or ring one side of the coin through the outer layer of the core of a first material and the outer layer of the ring of a second material and the other side of the coin through the outer layer of the core of the second Material and the outer layer of the ring formed from the first material. In this respect arise at Bicolorwendemünzen

different material combinations per page. There one

Different colors per page is present and the core or the ring is rotated, this type of coins can also as

Bicolorwendemünze be designated. Bicoloured coins can also be multi-layered.

Difficulty checking the coin in electronic

Coin validators can result in particular when the sides of the coin each have different materials facing each other, such as in the case of two or multi-layered coins, or the sides themselves are formed from respectively different combinations of materials, such as bicoloured coins.

Commercially available coin validators check the electromagnetic

Characteristics of one side of the coin with a defined distance between the coin and sensor surface, so that it is a one-sided coin test defined or can be spoken of a one-sided coin test. Due to the different

Electromagnetic properties of the plated coin alloys - especially in comparison of silver or gold-colored metals or alloys - gives a 50% probability that the coin is inserted with the "right" side, ie the sensor passes with the side on which Coins passing through the sensor with the opposite side are rejected, although they may be real, although DE 10 2004 001 464 A1 discloses a sensor which is capable of being detected by means of a reflex sensor should be to capture different materials of the front and back, but this method has not enforced, since all existing coin validator from the Traffic and have to be replaced by coin validators with modified technology.

In summary, it can be stated that known coins whose sides are made of different materials,

in particular multilayer coins, and / or

Material combinations per page, in particular Bicolorwendemünzen exist, on the one hand have a high security against counterfeiting, but can not be reliably detected by unilaterally checking coin validators.

The object of the present invention was now to propose an improved coin in terms of verifiability by an electronic coin validator, in particular to propose a coin with different materials or combinations of materials per page, in a single-acting coin validator

can be reliably detected regardless of the guided past the coin validator page. According to the invention this object is achieved by a coin having the characterizing features of claim 1. Characterized in that the first layer is between ^"ΙΟμιη and 90μιη, preferably 20μιη thick, the second layer can indeed be optically at least partially covered. However, the first layer is thin enough that the detection of the second layer is not unduly hindered by an electronic coin validator In this respect, through the

different materials on the two sides of the coin an at least two-colored coin can be provided, however, which can be reliably detected by a particular set up for the detection of the material of the second layer electronic coin validator. In this respect, the coin according to the invention be passed by any side of a single-sided electronic coin validator.

Further advantageous embodiments of the proposed coin will become apparent in particular from the dependent claims. The features of the subclaims can basically be combined with each other arbitrarily.

In an advantageous embodiment of the coin according to the invention can be provided that the coin has two layers, the first layer at least partially the first side of the coin and the second layer at least partially form the second side of the coin or the first layer of the first side and the second layer faces the second side of the coin. With this embodiment of the coin can be in particular

Two-layered coins with different materials and thus different colors of the pages very easy to produce. In this case, the side of the first layer not facing the second layer completely forms the first side of the coin and the side of the second layer facing away from the first layer completely forms the second one

Side of the coin. The first layer effectively covers the second layer facing it. Alternatively, a coin can also be used

comprising a ring and a core configured in such a way. The core and / or the ring is also constructed in this case two layers and the core turned inserted in the ring. In this way, a two-layer Bicolorwendemünze produce. Overall, the two-layer variant can be produced very inexpensively. In this context, it can advantageously be provided that the second layer is 0.8 to 2.8 mm, preferably 1.8 mm thick. In this embodiment of the coin, the second layer forms in a sense, the basic body of the coin, from which the actual mechanical stability of the coin arises.

In a further advantageous embodiment of the coin according to the invention can be provided that the coin comprises a further second layer of the second material and a base body, wherein the first second layer and the first layer on one side of the base body and the other second layer on the is arranged opposite side of the base body, wherein the first layer at least partially the first side of the

Coin and the other second layer at least partially form the second side of the coin and / or the first layer of the first side and the further second layer of the second side of the coin faces. Such a coin according to the invention is

accordingly built up at least four layers. The main body itself can be constructed in one or more layers and preferably represents the actually stable part of the coin. Insofar, for example, the second layers can also be substantially thinner than in the two-layered variant.

In this context, for example, be provided that the second layer and the further second layer between 50μιη to εθθμιη, preferably 300μιη to 400μιτι thick. Accordingly, costly material of the second layers may be saved here if necessary.

In a further advantageous embodiment of the coin according to the invention it can be provided that the coin is formed from a ring and a core arranged within the ring, wherein the core and / or the ring, the first layer, the second layer and in particular the further second layer and the main body having. In this embodiment, the coin is constructed as a bicolour or bicoloured coin with preferably a two- or four-layered core and / or ring. The first and second layers may be provided respectively in the core and the ring, as well as only in the core or the ring. Also, the core and / or the ring may be constructed in two or more layers. For example, the core and / or ring may contain only the above-mentioned two-layer structure. The core and / or ring may also contain the above-mentioned four-layered or multi-layered structure, in particular with the first layer, the second layer, the base body and the second second layer.

In this connection, it can be advantageously provided that the first layer of the core is arranged on the opposite side of the first layer of the ring. This puts in

Essentially a bicolour turning coin with a turned core or ring. Such a coin according to the invention, equipped with many optical distinguishing features, can be produced comparatively easily and with very little scrap, since both core and ring can be punched out of one and the same starting material. Subsequently, for example, only the core is rotated and inserted into the ring. As a result, a coin having, for example, the first layer at the ring and the second layer at the core results as outer visible layers on one side and the second layer on the ring and the first layer on the core as outer layers on the other side of the coin. The reliable detectability through a one-sided coin validator is still guaranteed despite the many optical differentiation features. In a further advantageous embodiment of the coin according to the invention can be provided that the coin has a layer of a third material, on the opposite side of the first layer is arranged. In principle, the same requirements should be imposed on the third material as on the material of the first layer, however, the first material and the third material should differ in order to ensure different colorations. In other words, the third material should be selected from the group defined for the first material, but not the same as the first material in the coin. Also, the third layer should have the same thickness or be in the same thickness range as the first layer. In this way, the second layer of the other coin side - if desired - also with a selected

Be colored, which is usually different from the color of the otherwise exposed second layer. Likewise, this layer can also be penetrated by the sensor calibrated on the second layer and the underlying second layer can be detected.

As materials for the first layer are preferably copper or copper alloys, such as CuNi8, C-uNMO,

CuZn6723 or CuZn20Ni5 in question.

As materials for the second layer or the further second layer are also copper or copper alloys, such as CuNi25 or CuZn20Ni5 in question. In essence, however

provided that in each case different materials for the first and the second or the second layer are used in a coin, however, wherein an identical material for the second and the further second layer is used. A selection of materials may also preferably via the electrical

Conductivity of the materials take place. In this context, it may be advantageously provided that the first material and / or the second material has an electrical conductivity of 4 to 106% IACS, preferably 4 to 30% IACS.

Another object of the present invention is to provide a method for producing a coin according to the invention

propose.

According to the invention this object is achieved by a method according to claim 14 or 15.

The fact that the coin is made of a plated flat

Composite material is produced, the required thicknesses of the layers can be achieved very easily and above all in their thickness very constant over the surface of the coin can be formed, whereby a very reliable detection of the second layer can be achieved. In addition, the individual layers can be used

Detect coin validators of the latest generation individually and safely.

A two-part coin according to the invention can likewise be produced very advantageously by virtue of the fact that the core and the ring comprise a clad composite composite material

at least the first layer and the second layer or the first layer, two second layers and the base body, punched out and then the core is inserted and secured in the ring rotated. In addition to the homogeneous over the surface layers, this method also produces very little scrap, since both ring, and core are made of the same composite material. In the case of a two-color coin, the

Reduce scrap rates by about 100% compared to known bi-color coins. Further features and advantages of the present invention will become apparent from the following description of preferred embodiments with reference to the accompanying drawings. Show in it

Fig. 1 a coin according to the invention in a cut

View (two layers);

FIG. 2 shows a coin according to the invention in a view on the first side; FIG.

FIG. 3 shows a coin according to the invention in a view onto the second side; FIG. Fig. 4 shows a second embodiment of an inventive

Coin in a cutaway view as a four-layered version;

Fig. 5 shows a second embodiment of an inventive

Coin in a view on the first page;

Fig. 6 shows a second embodiment of an inventive

Coin in a view on the second side; Fig. 7 shows a third embodiment of an inventive

Coin in a cut view as

Bicolorwendemünze;

Fig. 8 shows a third embodiment of an inventive

Coin in a view on the first page; 9 shows a third embodiment of a coin according to the invention in a view on the second side.

Fig. 10 is a plated sheet composite material for a

coin according to the invention, in particular

Bicolourwendemünze, according to Figures 7 to 9 with indicated punching;

11 shows a schematic illustration of the production process for a coin according to the invention according to FIGS. 7 to 9;

12 shows a schematic illustration of the production process for a coin according to the invention according to FIGS. 7 to 9. FIG. 13 shows a further embodiment of a coin according to the invention

Coin, in particular a two-layer coin with an additional third layer, in a sectional view; Fig. 14 shows a further embodiment of an inventive

Coin in a view on the first page;

Fig. 15 shows a further embodiment of an inventive

Coin in a view on the second side;

Fig. 16 shows a further embodiment of an inventive

Coin, in particular with a two-layered ring and a turned core; Fig. 17 shows a further embodiment of an inventive

Coin, in particular with a two-layer core and a ring of solid material; a further embodiment of a coin according to the invention, in particular with a multilayer core and a ring made of solid material; a further embodiment of a coin according to the invention, in particular with a multilayer core and a ring made of solid material; a further embodiment of a coin according to the invention, in particular with a core of solid material and a multilayer ring.

The proportions in the pictures are not

scale. The following reference numbers are used in the figures:

1 first shift

2 second layer

2 ^' (second) second layer

3 basic body

4 core

5 ring

6 layer

31 first body layer

32 second body layer

A coin according to the invention has at least one first layer 1 of a first material and a second layer 2 and possibly a further second layer 2 ^' of a second material. The first, very thin layer 1 at least partially forms the first side of the coin, while the second layer 2 immediately below the first Layer is arranged. The second layer 2 or the further second layer 2 ^' of an identical material forms in sections the other side of the coin. The other side of the coin can also be formed in sections by a layer 6, which will be discussed below.

Essentially, two goals can be achieved by this arrangement. On the one hand, the multicolor of the coin is ensured by the different materials of the layers. On the other hand, the first layer 1 is thin enough and / or chosen from the material so that it does not cover the underlying second layer 2 or only to a degree for detection by the electronic coin validator that results from the first layer 1

Deviations can be filtered out or in one

acceptable tolerance range. One on the detection of the

Second layer material 2 furnished electronic

Coin validator will accordingly detect the second layer 2 or the material of the second layer 2 under the first layer 1 with sufficient certainty. The second layer or further second layer facing the other side is in any case calibrated by one onto the material of the second layer or the further second layer

electronic coin validator detected. The coin can be detected from both sides by an electronic coin validator.

As materials for the layers different materials come into question. For example, copper materials have as

basically suitable for the coin according to the invention

exposed. As a material for the first layer 1 in addition to (technically) pure copper, and alloys such as CuNi8, CuNi10, CuZn6723 or CuZn20Ni5, as well as all common coinage materials in question. As material for the second layer, besides (technical) pure copper also alloys such as CuNi25 or CuZn20Ni5, as well as all common coin materials in question.

The selection of the materials for the layers can also be based on their electrical conductivity, also referred to as conductivity. Here, values of 4 to 106% lACS, preferably 4 to 30% lACS, have proven to be particularly advantageous for the layers.

In this respect, the first layer 1 preferably has an electrical conductivity of 4 to 106% lACS, preferably 4 to 30% lACS, and the second layer 2 or the further second layer 2 ^' one

electrical conductivity of 4 to 106% lACS, preferably 4 to 30% lACS. IACS is the abbreviation for the so-called

International Annealed Copper Standard. Here, the conductivity becomes a percentage of the conductivity of pure annealed copper

expressed. 100% IACS corresponds to about 58 MS / m in SI units. On the other hand, alloys or other metals have different lACS values than copper, with the IACS-νοη distinguishing alloys from alloys or metals.

The preferred embodiments of the coin according to the invention described below have, purely by way of example, all a first layer 1 of, for example, CuNMO and at least one second layer 2, if appropriate also a (second) second layer 2 ^' of, for example, CuNi25. The second layers 2 and 2 ^' are each off

made of the same material, in this case CuNi25. The first layer 1 has a thickness in the range between 10μιη to 90μιη, preferably 10μιη to βθμητι, more preferably 20μιη. It should be noted that the previous and following

Thickness indications which should also include boundary values, i.

For example, the first layer may also be exactly 10μιη or ΘΟμιη thick. The second layers 2, 2 ^' can be in different Thickness, but are always made of the same material. Below, the terms first page and second page are used to distinguish the two sides of the coin - it could also be from the front and back

to be spoken. The layers form as far as it is concerned

Of course, external layers only act

one page at a time, as always one side of a

outer layer facing an inner layer or another layer. The list of embodiments is not exhaustive. There are other materials

Material combinations or configurations conceivable.

A coin according to the invention in a first embodiment comprises exclusively the first layer 1 and the second layer 2. The first layer 1 faces the first side and the second layer 2 the second side. The second layer 2 has a thickness of 0.8 mm to 2.8 mm, preferably 1.8 mm. The sides 1 and the second layer as the second side can be gold, silver, bronze or reddish, depending on the material. Decisive is the color different appearance of the front and back. With the first layer 1, the first side of the coin is bronze-colored and with the second layer 2, the second side of the coin is silver-colored.

A coin according to the invention in a second embodiment comprises the first layer 1 and twice the second layer 2, 2 ^' and a base body 3. From the first side to the second side of the coin, the sequence of layers is as follows: first layer 1, second layer 2 , Main body 3, (second) second layer 2 ^' . In this respect, there is a coin with gold, silver, bronze or reddish color of the front and back, with the front and back differ in color from each other. The second layers 2, 2 ^' are 50μιη to ΘΟΟμιη, preferably 300μιη up to 400μιτι thick. The main body 3 preferably consists of a layer or layer and has a thickness of 40μιη to 650μιη, preferably ΙΟΟμηι on. Alternatively, the main body 3 may consist of several layers.

A coin according to the invention in a third embodiment, in particular as a bicoloured coin, comprises an outer ring 5 and a core 4. The core 4 is inserted in the ring 5,

in particular with the ring 5 pressed or fastened in another way. The core 4 comprises the first layer 1, two second layers 2, 2 ^' and the main body 3. The core 4 can therefore be constructed like the coin in the aforementioned paragraph, that is the second

Layers 2, 2 ^' are 50μιη to 600μιη, preferably 300μιη to 400μιτι thick. The main body 3 is preferably made of a layer or a solid material and has a thickness of 40μιη to 650μιτι, preferably 100 m. However, the main body 3 of the core 4 may also be constructed in multiple layers. The ring 5 comprises the first layer, two second layers 2, 2 ^' and the main body 3. The second layers 2, 2 ^' are 50 to 600 μιη, preferably 300 to 400μιη thick. The main body 3 of the ring 5 can be on or

be multi-layered. The ring 5 or the core 4 can also be constructed in a conventional manner or be made massive,

in particular also be electroplated. The core 4 is inversely inserted into the ring 5, ie the first layer 1 of the ring 5 and the second layer 2 of the core 4 form the first side in sections or face the first side and the

(second) second layer 2 ^'of the ring 5 and the first layer 1 of the core 4 form in sections the second side of the coin or are facing the second side. The production of the coins according to the invention is preferably carried out by plating, in particular roll-plating. However, other methods are also conceivable, such as electroplating, etc. For producing a coin according to the invention according to the first one

Embodiment, the first layer 1, for example made of CuNMO, on a sheet, such as CuNi25, plated. In this case, the metal sheet represents the second layer 2. In a next method step, the coins according to the invention are punched out of the thus produced plated composite sheet material.

To produce a coin according to the invention according to the second embodiment, two second layers 2, 2 'are made

For example, CuNi25, on a single or multi-layered

Body 3 plated on both sides. Subsequently or simultaneously, the first layer 1, made of, for example, CuNMO, is plated on one of the second layers 2. In a next

In the process step, the coins are punched out of the thus produced clad laminar composite material.

It is also conceivable to first laminate the first layer onto one of the second layers. Subsequently, for example, a second second layer can be clad on the base body and then the combination of the already clad first and second layer are plated on the base body.

To produce a coin according to the invention according to the third embodiment, two second layers 2, 2 'are made

For example, CuNi25 on a single or multi-layered

Body 3 plated on both sides. Subsequently or simultaneously, the first layer of, for example, CuNMO is plated on one of the second layers. In a next In the process step, both cores 4 and rings 5 are punched out of the thus produced clad composite material. The cores 4 are rotated, reversed accordingly inserted into the rings 5 and suitably fastened, for example by pressing.

As a result, in all manufacturing processes or

Embodiments, the coins having at least two differently colored top and bottom sides, or even on the first side and the second side have different colors (third embodiment). However, everyone is united

Coins according to the invention that they are very tamper-proof due to the different colors. In addition, such coins are also reliably detectable with commercially available, ie one-sided, valid coin validators. In essence, this effect is based on the fact that the sensor is tuned to the second layer 2 or 2 ^' , that is to say the coin with the second layer 2 or 2 ^' is fed directly to the sensor, in each case a reliable detection of the coin instead of. With the coin according to the invention but also the other side can be reliably measured. This is essentially due to the fact that the first layer 1 of, for example, CuNMO, the electromagnetic measurement of the underlying second layer 2 of, for example, CuNi25 only

insignificantly influenced, but at least negligibly influenced for the purpose pursued here, so that the authenticity of the

coin according to the invention can also be safely checked from the side with the first layer 1 from. As a result, it does not matter how the coin is inserted into the coin validator.

In a further embodiment of the present invention, a further layer 6 of a third material may be used. For example, a second layer 2 or the further second layer 2 ^{'may be} coated with a layer 6. she However, in order to ensure a different coloration of the two sides of the coin can not be made of the same material as the first layer. For example, the same

To be able to ensure detectability of the underlying second layer, the layer 6, like the first layer, should also be between 10μιη and 90μιτι, preferably 20μιτι thick and it should also in the third material of the layer 6 to a

Material that is made of the material for the first

envisaged group, so for example copper or a copper alloy, in particular CuNi8, CuNilO, CuZn6723 or CuZn20Ni5. Preferably, the layer 6 should also have an electrical conductivity of 4 to 106% IACS, preferably 4 to 30% IACS. The result is a coin, as shown for example in Figs. 13 to 15. Here, the first layer 1 forms one side of the coin and the layer 6 forms the other side of the coin. The materials of the aforementioned layers are

different, so that there are two different colors. Nonetheless, the underlying second layer 2 can be detected from both sides. The principle can be transferred both to the basic body versions and to the turning coin.

FIGS. 16 to 19 show further embodiments of the invention

coin according to the invention shown. The made here

Presentation of further embodiments is not exhaustive. There are further embodiments conceivable. Also, for example, as

Ring material, the material of the second layer 2 has been selected. Here are other materials conceivable. In Fig. 20 is to indicate that the combination of first layer 1 and second layer 2 and the other layers can also be located only in the ring.

Claims

claims:

A coin, medal or casino token having a first page and a second page comprising at least

a first layer (1) of a first material,

- At least a second layer (2) of a second

Material, characterized in that

- The first layer (1) ^" ΙΟμιτι to 90μιη, preferably 20μιτι, is thick.

2. coin, medal or casino token according to claim 1, characterized in that the coin has two layers (1, 2), wherein the first layer (1) at least partially the first side of the coin and the second layer (2) at least

sections forms the second side of the coin or the first layer (1) of the first side and the second layer (2) faces the second side of the coin.

3. coin, medal or casino token according to claim 2, characterized in that the second layer (2) 0.8mm to 2.8mm, preferably 1.8mm, thick.

4. coin, medal or casino token according to claim 1, characterized in that the coin comprises a further second layer (2 ^' ) of the second material and a base body (3), wherein the first second layer (2) and the first Layer on one side of the base body (3) and the other second layer (2 ^' ) on the opposite side of the base body (3) wherein the first layer (1) at least in sections forms the first side of the coin and the further second layer (2 ^' ) forms the second side of the coin at least in sections or the first layer (1) of the first side and the further second layer (FIG. 2 ^' ) of the second side of the coin

is facing.

5. coin, medal or casino token according to claim 4, characterized in that the second layer (2) and the further second layer (2 ^' ) 50μιη to 600μιτι, preferably 300μιτι to 400μιη, thick.

6. coin, medal or casino token according to at least one of the preceding claims, characterized in that the coin of a ring (5) and a core arranged inside the ring (4) is formed, wherein the core (4) and / or the ring (5) the first layer (1), the second layer (2) and in particular the further second layer (2 ^' ) and the

Basic body (3).

Coin, medal or casino token according to claim 6, characterized in that the first layer (1) of the core (4) is arranged on the opposite side of the first layer (1) of the ring (5).

8. coin, medal or casino token according to at least one of the preceding claims, characterized in that the coin has a layer (6) of a third material which on the opposite side of the first layer (1)

is arranged.

9. coin, medal or casino token according to at least one of the preceding claims, characterized in that it is the first material and / or the third material to copper or a copper alloy, in particular CuNi8, CuNMO, CuZn6723 or CuZn20Ni5, is.

10. coin, medal or casino token according to at least one of the preceding claims, characterized in that it is the second material to copper or a

Copper alloy, in particular CuNi25 or CuZn20Ni5, is.

11. Coin, medal or casino token according to at least one of the preceding claims, characterized in that the first material and / or the second material have an electrical conductivity of 4 to 106% lACS, preferably 4 to 30% lACS.

12. coin, medal or casino token according to at least one of the preceding claims, characterized in that it is in the first material and the second material and in the first material and the third material to

different materials.

13. coin, medal or casino token according to at least one of the preceding claims, characterized in that for the second layer (2) and the further second layer (2 ^' ) the same materials are used.

14. A method for producing a coin, medal or casino token according to any one of claims 1 to 13, characterized

in that the coin is produced from a plated flat composite material, in particular punched out. A method of making a coin, medal or casino token according to any one of claims 6 to 13, characterized

in that the core (4) and the ring (5) are punched out of a plated sheet composite material and

then the core (4) turned into the ring (5) is inserted and fixed.