NZ742611A - Inspection system and game token - Google Patents
Inspection system and game tokenInfo
- Publication number
- NZ742611A NZ742611A NZ742611A NZ74261118A NZ742611A NZ 742611 A NZ742611 A NZ 742611A NZ 742611 A NZ742611 A NZ 742611A NZ 74261118 A NZ74261118 A NZ 74261118A NZ 742611 A NZ742611 A NZ 742611A
- Authority
- NZ
- New Zealand
- Prior art keywords
- game token
- game
- unique
- ink
- token
- Prior art date
Links
- 238000007689 inspection Methods 0.000 title claims abstract description 91
- 230000001678 irradiating Effects 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims description 55
- 239000011358 absorbing material Substances 0.000 claims description 19
- 230000004048 modification Effects 0.000 description 11
- 238000006011 modification reaction Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 230000001681 protective Effects 0.000 description 8
- 239000003086 colorant Substances 0.000 description 6
- 230000000875 corresponding Effects 0.000 description 6
- 238000003854 Surface Print Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 3
- 230000002542 deteriorative Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010801 machine learning Methods 0.000 description 1
- 230000001537 neural Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Abstract
inspection system for inspecting a game token, includes: a game token assigned with code information such that an ID mark region covered with a UV ink is partially irradiated with laser light to denature or remove the irradiated part; an ultraviolet irradiation lamp for irradiating the game token with ultraviolet light for visualizing the UV ink; a UV camera configured to shoot the game token irradiated with ultraviolet light; and an inspection device configured to recognize the code information that has been visualized by the irradiation with ultraviolet light based on an image shot by the UV camera and determine authenticity of the game token. with ultraviolet light for visualizing the UV ink; a UV camera configured to shoot the game token irradiated with ultraviolet light; and an inspection device configured to recognize the code information that has been visualized by the irradiation with ultraviolet light based on an image shot by the UV camera and determine authenticity of the game token.
Description
PAPC-5015US
INSPECTION SYSTEM AND GAME TOKEN
CROSS REFERENCE TO RELATED APPLICATION
This nonprovisional application is based on Japanese
Patent Application No. 2017-099903 filed with the Japan
Patent Office on May 19, 2017, the entire contents of which
are hereby incorporated by reference.
FIELD
The present invention relates to an inspection system
for game tokens used in table games, and a game token.
BACKGROUND AND SUMMARY
Conventionally, table games using game tokens are
played in gaming houses such as casinos. Since game tokens
can be cashed, counterfeiting is strictly controlled.
Various techniques have been proposed and adopted in order
to distinguish counterfeit game tokens from genuine game
tokens. For example, there is known a method of embedding
a Radio-frequency identification (RFID) tag recorded with
identification information into a game token and reading
the identification information with an RFID reader to
determine authenticity of the game token (for example, JP
2008-246103 A).
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On the other hand, different values are defined for
different types of game tokens, and techniques for
detecting the values of the game tokens have also been
proposed in order to automate the table games. For example,
there is known a method of embedding into a game token an
RFID tag recorded with information on a type or a value of
the game token and reading the information with an RFID
reader to detect the value of the game token (for example,
see JP 2008-246103 A).
An object of the present invention is to provide a
novel game token that enables determination of authenticity
thereof based on an image obtained by shooting by a camera,
and an inspection system of inspecting the game token.
According to one aspect of the present invention,
there is provided an inspection system for game tokens for
games using a game table, including: at least one camera
configured to shoot the game tokens; a recording device
configured to record types and authenticity of the game
tokens using the camera; and an inspection device
configured to determine authenticity of the game tokens
using a result recorded by the recording device, each of
the game tokens is provided with a unique ID for individual
identification in appearance, the inspection device reads
the unique ID of a target game token for inspection among
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the game tokens using the camera, and determines
authenticity of the target game token based on the read
unique ID, and the unique ID for individual identification
or for individual identification in a specific group unit
is formed by irradiating an ID mark region that is included
in each of the game tokens and is formed of a UV ink or an
infrared absorbing material with laser light to partially
denature or remove the UV ink or the infrared absorbing
material that forms the ID mark region.
With this configuration, the unique ID appears in the
ID mark region by irradiating the ID mark region on the
game token with ultraviolet light or infrared rays, and
thus the authenticity can be determined by reading the
unique ID of the game token.
In the above inspection system, the unique ID may be
associated with any one of a machine used for manufacturing
the game tokens, a sequence of manufacture, time of
manufacture, and manufacturing information in a database.
With this configuration, any one of a machine used
for manufacturing the game tokens, a sequence of
manufacture, time of manufacture, and manufacturing
information can be determined by reading the ID code.
In the above inspection system, each of the game
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tokens may further include an RFID or an ID code aside from
the unique ID for individual identification that is
provided on an outer layer of the game token, the
inspection system may further include a database configured
to associate the unique ID provided on the outer layer with
the RFID or the ID code, and the inspection device may read
the unique ID added to the target game token for inspection
using the camera, and determines authenticity of the target
game token based on a result of comparison of the read
unique ID and the RFID or the ID code with contents of the
database.
This configuration makes it possible to determine
authenticity of each of the game tokens by comparing the
unique ID provided using the UV ink or the infrared
absorbing material with the RFID or the ID code provided
aside from the unique ID.
In the above inspection system, at least one camera
may include a normal camera, and an infrared camera or a UV
camera, and the inspection device may be configured to
determine authenticity of the game tokens using the normal
camera, and the infrared camera or the UV camera.
This configuration makes it possible to determine
authenticity of the game tokens by shooting the unique ID
appeared in the ID mark region with the infrared camera or
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the UV camera.
In the above inspection system, the unique ID
provided on each of the game tokens may be a code expressed
by a character or a mark.
With this configuration, the unique ID is expressed
by a character or a mark.
In the inspection system, the unique ID provided on
each of the game tokens may be transparent.
This configuration makes it possible to add the
unique ID without deteriorating the design of each of the
game tokens and also improve security.
According to another aspect of the present invention,
there is provided a game token comprising a unique ID for
individual identification provided on an outer layer of the
game token, the unique ID is read by a camera and allows
determination of authenticity of the game token, and the
unique ID for individual identification or for individual
identification in a specific group unit is formed by
irradiating an ID mark region that is included in the game
token and is formed of a UV ink or an infrared absorbing
material with laser light to partially denature or remove
the UV ink or the infrared absorbing material that forms
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the ID mark region.
With this configuration, the unique ID appears in the
ID mark region by irradiating the ID mark region on each of
the game tokens with ultraviolet light or infrared rays,
and thus the authenticity can be determined by reading the
unique ID on each of the game tokens.
In the above game token, the unique ID may be
associated with any one of a machine used for manufacturing
the game tokens, a sequence of manufacture, time of
manufacture, and manufacturing information by a database.
With this configuration, any one of a machine used
for manufacturing the game tokens, a sequence of
manufacture, time of manufacture, and manufacturing
information can be determined by reading the ID code.
The above game token may further includes an RFID or
an ID code aside from the unique ID for individual
identification that is provided on the outer layer of the
game token, and by using a database configured to associate
the unique ID provided on the outer layer of the game token
with the RFID or the ID code, authenticity of the target
game token may be determined based on a result of
comparison of the unique ID assigned to the target game
token and the RFID or the ID code with contents of the
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database.
This configuration makes it possible to determine
authenticity of each of the game tokens by comparing the
unique ID provided using the UV ink or the infrared
absorbing material with the RFID or the ID code provided
aside from the unique ID.
In the above game token, the unique ID provided on
the game token may be a code expressed by a character or a
mark.
With this configuration, the unique ID is expressed
by a character or a mark.
In the above game token, the unique ID provided on
the game token may be transparent.
This configuration makes it possible to add the
unique ID without deteriorating the design of each of the
game tokens and also improve security.
According to a further aspect of the present
invention, there is provided an inspection system for
inspecting a game token, including: a game token that
includes an ID mark region entirely covered with an ink,
and is provided with code information by irradiating a part
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of the ID mark region with laser light such that the
irradiated part is denatured or removed; a camera for
shooting the game token; and an inspection device
configured to read the code information and determine
authenticity of the game token based on an image shot by
the camera.
With this configuration, authenticity of each of the
game token can be determined by reading the code
information provided by irradiation with laser light.
In the above inspection system, the ink that entirely
covers the ID mark region may be an invisible ink, the
inspection system may further include a lamp configured to
irradiate the game token with light for visualizing the
invisible ink, and the inspection device may read the code
information that has been visualized by the irradiation
with the light.
This configuration makes it possible to add the
unique ID without affecting the design of each of the game
tokens and also improve security, since the ID mark region
cannot be visually observed under visible light.
According to a yet further aspect of the present
invention, there is provided a game token including: a
display surface that displays at least a value of the game
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token; and an ID mark region provided on the display
surface and entirely covered with an ink, and a part of the
ID mark region is irradiated with laser light so that the
irradiated part is denatured or removed to add first code
information to the game token.
With this configuration, the code information can be
added by irradiation with laser light.
In the above game token, the ink that entirely covers
the ID mark region may be a UV ink that emits light when
irradiated with ultraviolet light, and the part irradiated
with laser light may be denatured or removed so as not to
emit light even when irradiated with ultraviolet light.
With this configuration, the first code information
can be visualized by irradiating the ID mark region with
ultraviolet light.
In the above game token, the ink that entirely covers
the ID mark region may be an ink formed of an infrared
absorbing material which absorbs infrared rays, and the
part irradiated with laser light may be denatured or
removed so as not to absorb infrared rays.
With this configuration, the first code information
can be visualized by irradiating the ID mark region with
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infrared rays.
In the above game token, the game token may be
manufactured by being cut out from a game token original
plate, the game token may further includes second code
information added with the ink, the first code information
may be information that uniquely identifies the game token
original plate, and the second code information may be
information that specifies a position in the game token
original plate.
With this configuration, information that uniquely
identifies the game token can be configured by the first
code information and the second code information.
The foregoing and other objects, features, aspects
and advantages of the exemplary embodiments will become
more apparent from the following detailed description of
the exemplary embodiments when taken in conjunction with
the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
is a cross-sectional view of a game token
according to an embodiment of the present invention;
is a plan view of the game token according to
the embodiment of the present invention;
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is a perspective view showing a state in which
a plurality of the game tokens are stacked according to the
embodiment of the present invention;
is an enlarged view of an invisible ink region
according to the embodiment of the present invention;
shows a game token original plate according to
the embodiment of the present invention;
is a flowchart of a manufacturing process of
the game tokens according to the embodiment of the present
invention;
is a plan view of a sheet member serving as a
printable layer according to the embodiment of the present
invention;
is a side view of the sheet member coated with
a protective film according to the embodiment of the
present invention;
illustrates a stacking order of sheet members
according to the embodiment of the present invention;
is a flowchart of a manufacturing process of
game tokens according to a modification of the embodiment
of the present invention;
is a cross-sectional view of a game token
according to the modification of the embodiment of the
present invention;
shows a configuration for inspecting the game
tokens on a game table according to the embodiment of the
present invention;
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is a block diagram showing a configuration of
an inspection system according to the embodiment of the
present invention;
is a cross-sectional view of a game token
according to a modification of the embodiment of the
present invention;
shows a configuration for inspecting the game
tokens collected for inspection according to a modification
of the embodiment of the present invention; and
is a block diagram of an inspection system
according to the modification of the embodiment of the
present invention.
DETAILED DESCRIPTION OF NON-LIMITING EXAMPLE EMBODIMENTS
Hereinafter, an embodiment of the present invention
will be described with reference to the drawings. It is to
be noted that the embodiment described below is merely an
example of implementing the present invention, and the
present invention is not limited to the specific
configurations described below. To practice the present
invention, a specific configuration according to the
embodiment may be adopted as appropriate.
An inspection system of the present embodiment is a
system for inspecting a game token used for table games
using a game table. First, a configuration of the game
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token is described. is a cross-sectional view of
the game token, is a plan view of the game token,
and is a perspective view showing a state in which a
plurality of the game tokens are stacked.
A game token 1 has a shape of a multilayered disc
formed by stamping out a circular shaped piece from a game
token original plate that is obtained by bonding a
plurality of plastic sheet members by thermocompression
bonding. In the present embodiment, as will be described
later, 50 circular shaped pieces are stamped out from one
game token original plate to produce 50 game tokens 1.
As shown in the game token 1 has a five-layer
structure formed by sandwiching a three-layer structure
between printable layers 14. The three-layer structure
includes a colored layer (designated color layer) 11
colored with a designated color, and light-colored layers
( common color layers) 12 on both sides of the colored layer
11. Note that a transparent protective film 15 such as
varnish is provided on a surface of each of the printable
layers 14, and when the protective film 15 is counted as
one layer, the game token has a seven-layer structure. A
Radio-frequency identification (RFID) tag 13 is provided
between the colored layer 11 and one of the light-colored
layers 12, so that the RFID tag 13 is embedded in the game
token 1. Specifically, light-colored sheet members
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constituting the light-colored layers 12 sandwiches a
colored sheet member constituting the colored layer 11 from
both sides thereof, while the RFID tag 13 is sandwiched
between one of the light-colored layers 12 and the colored
layer 11 so as to be placed at the center of a portion to
be stamped out for the game token 1. Then, both sides of
these three sheet members are sandwiched between sheet
members constituting the printable layers 14, and then the
five sheet members thus obtained are bonded by
thermocompression bonding, thereby forming the game token
original plate 10. The game token 1 incorporating the RFID
tag 13 at the center thereof and having a striped pattern
consisting of the colored layer 11 and the two light-
colored layers 12 sandwiching the colored layer 11 on the
side surface thereof is obtained by stamping out a circular
shaped piece from the game token original plate 10.
There are a plurality of types of the game tokens 1
(10 points, 20 points, 100 points, 1000 points, etc.)
depending on the values thereof, and different types of the
game tokens 1 have different colors (designated colors) of
the colored layers 11. That is, the designated colors
represent the types of the game tokens 1, for example, 10
points, 20 points, 100 points, and 1000 points are
represented by red, green, yellow, and blue, respectively.
The game token 1 includes the colored layer 11 as an
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intermediate layer, and the both sides of the colored layer
11 are sandwiched between the light-colored layers 12.
Thus, even when a plurality of the game tokens 1 are
stacked as shown in the colored layers 11 of the
game tokens 1 are separated from each other in the stacking
direction of the layers, so that the number and the type
(value) of the game tokens 1 can be detected with the
colors of the colored layers 11 each of which can be
observed from the side surface of the game token 1. Note
that the color of the light-colored layers 12 may be any
color that is lighter than that of the colored layer 11,
and may be white. The colors of the colored layers 11 are
different from each other depending on the types of the
game tokens 1, whereas the color of the light-colored
layers 12 is common to all types of the game tokens 1.
As shown in the surface of the printable
layer 14 on each side of the game token 1 serves as a
display surface 120, and includes at least a printed number
indicating the value of the game token 1. In the example
of a number “100” indicating the value of 100
points is printed and displayed on the display surface 120.
The display surface 120 is further provided with code
information for examining the authenticity at a
predetermined position.
The code information is printed on the display
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surface 120 with a transparent invisible ink which cannot
be observed under visible light. The code information
includes first code information added to an identification
(ID) mark region 121 in which the invisible ink is solidly
painted, and second code information added to the outside
of the ID mark region 121. Note that the second code
information may be provided in the ID mark region 121.
The first code information expresses information by
the presence or absence of marks 122 at 10 predetermined
positions arranged in two rows along the circumference of
the game token 1 ( total of 20 predetermined positions), and
is capable of expressing the tenth power of four (the
twentieth power of two) kinds of information.
is an enlarged view of the ID mark region 121.
The ID mark region 121 is coated with a UV ink which is an
invisible ink, and the marks 122 are formed by irradiating
the UV ink with laser light. Although the UV ink emits
fluorescent light when irradiated with ultraviolet light,
the UV ink at the portions of the marks 122 that have been
irradiated with laser light is denatured and does not emit
light even when irradiated with ultraviolet light.
Therefore, the portions that do not emit light in the ID
mark region 121 can be observed in appearance as the marks
122, when the ID mark region 121 is entirely irradiated
with ultraviolet light.
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In the ID mark region 121, an L-shaped mark 124
serving as a reference mark is displayed. With reference
to the L-shaped mark 124, the positions of the marks 122 at
the predetermined positions in 2 rows and 10 columns can be
specified. The ID mark region 121 is provided with a
unique ID as the first code information that enables
individual identification by appearance. This ID enables
individual identification of the game token original plate
for manufacturing the game tokens 1.
That is, the IDs of the ID mark regions 121 on a
plurality of the game tokens 1 (50 pieces in the present
embodiment) obtained from one game token original plate 10
are identical to each other. Provided that one game token
original plate 10 is one group, the ID represented by the
first code information of the ID mark region 121 is a
unique ID that enables individual identification of the
game tokens 1 in a group unit. As described above, the ID
mark region 121 is a region to which a unique ID is
provided by using the marks 122.
The ID indicating the first code information is
stored in a database 56 in association with any one of or a
combination of information on a machine used for
manufacturing the game token original plate 10, a sequence
of manufacture, time of manufacture, the manufacturing
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information.
On the other hand, the second code information
expresses information by the presence or absence of marks
123 at six predetermined positions aligned along the
circumference of the game token 1, and is capable of
expressing the sixth power of two kinds of information.
The second code information also indicates a unique ID that
enables individual identification by appearance. This ID
enables individual identification of the position on the
game token original plate 10 for manufacturing the game
tokens 1. In other words, the second code information
indicates the position on the game token original plate 10,
and thus the second code information of the game tokens 1
cut out from the same position of different game token
original plates 10 is the same, and the second code
information of the game tokens 1 cut out from one game
token original plate 10 is different from one another.
is a plan view of one game token original
plate 10 for manufacturing a plurality of the game tokens 1.
As described above, one game token original plate 10
produces a total of fifty game tokens 1 in 10 rows and 5
columns. As shown in in one game token original
plate 10, 50 game tokens 1 include different combinations
of marks 123 as the second code information so as to
specify the positions of the game tokens 1 on the game
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token original plate 10.
In view of the above, the first code information can
uniquely identify the game token original plate 10 for
manufacturing the game tokens 1, and the second code
information can uniquely identify the position of each of
the game tokens 1 on the game token original plate 10 for
manufacturing the game tokens 1. Thus, each of the game
tokens 1 can be uniquely identified by specifying the first
code information and the second code information. Since
the first code information can express the twentieth power
of two kinds of information and the second code information
can express the sixth power of two kinds of information as
described above, a combination of the first code
information and the second code information can express the
twenty-sixth power of two kinds of information.
The RFID tag 13 stores a unique ID (RFID) as
information uniquely identifying each of the game tokens 1
(RFID tag information). The RFID tag information may be
the same information as the code information or different
information from the code information that is composed of
the first code information expressed in invisible ink and
the second code information on the display surface 120 of
the printable layer 14.
is a flowchart of a manufacturing process of
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the game tokens 1. First, printing is performed on a sheet
member serving as the printable layer 14 (step S61). is a plan view of a sheet member 140 serving as the
printable layer 14. As shown in the sheet member
140 includes a portion to become an upper printable layer
14 and a portion to become a lower printable layer 14 are
arranged side by side, and the second code information of
one to fifty is arranged line-symmetrically across a center
line C positioned at the horizontal center of the sheet
member 140. That is, printing corresponding to the game
tokens 1 in 10 rows and 10 columns is performed on one
sheet member 140. In #1 to #50 each indicate the
second code information (that is, information for
specifying the position of the game tokens 1 on the game
token original plate 10), but in practice, the items shown
in are printed. When the printing on the sheet
member 140 is finished, the protective film 150 is applied
on the sheet member 140 (step S62).
Next, the sheet members 140 respectively coated with
the protective films 150, the sheet members 120 serving as
the light-colored layers 12, and the sheet member 110
serving as the colored layer 11 are stacked (step S63).
is a side view of the sheet member 140 coated with
the protective film 150, and is a view illustrating
the stacking order of the sheet members.
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As shown in RFID tags 13 are disposed at
positions corresponding to the game tokens 1 on the sheet
member 110 serving as a colored layer, the sheet members
120 serving as the light-colored layers 12 are disposed on
both sides of the sheet member 110, and the sheet members
140 are respectively disposed on the sheet members 120. At
this time, the upper one of the sheet members 140 is
disposed with a printable surface (a surface coated with
the protective film 150) facing upward, and the lower one
of the sheet members 140 is disposed with a printable
surface (a surface coated with the protective film 150)
facing downward.
Since the second code information is printed line-
symmetrically across the center line C (see , the
positions of the second code information in the upper and
lower sheet members 140 coincide with each other when the
sheet member 140 including 10 rows and 10 columns of the
second information is cut into two pieces along the center
line C and one of the pieces (a piece on the right side in
is folded back around the center line C (see such that the sheet members are stacked as shown in In this manner, the upper and lower sheet members 140
are formed of one sheet member at a printing stage, and are
cut apart into the upper and lower sheet members 140 at the
time of stacking the sheet members, which results in
reduction in occurrence of erroneous combination of the
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upper and lower sheet members 140.
Next, the sheet members stacked in the order shown in
are subjected to thermocompression bonding (step
S64). Thereby, the game token original plate 10 is formed.
The RFID tag information is read out from the 50 RFID tags
13 embedded in the game token original plate 10 by using an
RFID reader (step S65), and associated with the information
uniquely identifying the game token original plate 10 (ID
identifying the sheet member 140) in the database (step
S66).
Next, a stamping process for stamping out the 50 game
tokens 1 from the game token original plate 10 is performed
(step S67). Thereby, 50 game tokens 1 are obtained. The
first code information is written by laser irradiation one
by one on the ID mark regions 121 (printed on both
surfaces) of the 50 game tokens 1 (step S68). As described
above, the RFID tag information in each of the RFID tags 13
is associated with the first code information (ID of the
game token original plate 10) in the database, and thus the
RFID tag information is read out with the RFID reader, and
the first code information corresponding to the read RFID
tag information is written at the time of writing step by
using laser irradiation.
Finally, information is written in each of the RFID
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tags 13 by using an RFID writer (step S69). Here, as the
RFID tag information, the amount of the game token,
information on the casino, information on junkets, an
attribute of the token such as whether a rolling chip or a
cash chip (whether a cashable chip or not) and other
information or code desired by the user are written in
addition to the first code information and the second code
information.
As described above, in the present embodiment, the
printing step of the second code information and the ID
mark region (step S61) is performed on the printable layer
14 in a state of the sheet member 140 before the stamping
process (step S67), and the writing step of the first code
information by laser irradiation on the ID mark region 121
(step S68) is performed on the ID mark region 121 of each
of the game tokens 1 which has been stamped into pieces
after the stamping process (step S67). If the laser
irradiation step (step S68) is to be performed before the
stamping process (step S67) (that is, laser irradiation is
performed on the game token original plate 10), it becomes
necessary to arrange a plurality of laser irradiators, or
in the case of to move a single laser irradiator, it
becomes necessary to move the laser irradiator or move the
game token original plate 10. However, since laser
irradiators are relatively expensive, preparation of a
plurality of laser irradiators is disadvantageous in cost.
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Further, a mechanism for moving a laser irradiator or the
game token original plate 10 requires high accuracy. In
addition, it is not easy to move a laser irradiator as a
laser irradiator is heavy. For these reasons, the first
code information is written on the game token 1 by laser
irradiation one by one after the stamping process (step
S67). Since the information to be written by laser
irradiation can be determined by reading the RFID tag
information that has been written in the RFID tag 13, the
information to be written can be correctly written by laser
irradiation by reading the RFID tag information at the time
of laser irradiation step.
is a flowchart of another example of the
manufacturing process of the game tokens 1. In this
manufacturing process, a game token 1 having a three-layer
structure shown in is manufactured. As shown in
, the game token 1 has a three-layer structure
including the colored layer 11 and the upper and lower
light-colored layers 12 sandwiching the colored layer 11,
and each of the surfaces of the light-colored layer 12
serves as the display surface 120. That is, printing is
performed directly on the surface of the light-colored
layer 12. To manufacture the game tokens 1, a light-
colored sheet member is prepared, the RFID tag 13 is placed
thereon at the center of each of the stamping positions for
the game tokens 1, and then a sheet member colored with a
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designated color and another light-colored sheet member are
stacked in this order to form a laminated structure formed
of a plurality of plastic layers. Then, the laminated
structure is pressed in the stacking direction while being
applied with heat, so that the layers are thermally welded
to each other, thereby producing a game token original
plate 10 having a three-layer structure (step S101).
Next, numbers indicating the value of each of the
game tokens 1, the ID mark regions 121 for indicating the
first code information, and the marks 123 indicating the
second code information are printed on the display surface
120 of the game token original plate 10 (step S102). At
this time, the ID mark region 121 is simply filled in
through the entire area thereof at any position, that is,
the first code information has not been assigned, while a
combination of the marks 123 indicating the second code
information varies depending on the position on the game
token original plate 10.
In other words, at the printing step on the game
token original plate 10, a UV ink, which is an invisible
ink, is applied to the entire are of the ID mark region 121
(solid coating), and an ID corresponding to the position of
each of the game tokens 1 on the game token original plate
is added as the second code information. As described
above, the first code information for uniquely identifying
PAPC-5015US
the game token original plate 10 is to be added by
irradiating the ID mark regions 121 with laser light, and
thus, a plurality of game token original plates 10 can be
printed with the same printing plate at this printing step.
When printing is finished, laser light is applied to
the plurality of ID mark regions 121 on the game token
original plate 10 in order to assign the first code
information (step S103). As described above, the first
code information is information which can individually
identify the game token original plate 10, and thus the
same first code information is assigned to the plurality of
ID mark regions 121 on the same game token original plate
Next, RFID tag information is written into each of
the RFID tags 13 using an RFID writer (step S104). Upon
completion of the above steps, a stamping process is
performed on each position on the game token original plate
corresponding to a plurality of the game tokens 1 using
a mold (step S105), and disc-shaped game tokens 1 are
obtained. The writing of the RFID tag information may be
performed before the laser irradiation step, before the
printing step, or before the thermocompression bonding step.
Next, an inspection system including the game tokens
1 will be described. is a diagram showing a
PAPC-5015US
configuration for inspecting the game token 1 placed on the
game table T, and is a block diagram showing a
configuration of the inspection system.
As shown in , an inspection system 50 includes
a UV camera 51, a visible-light camera 52, an RFID reader
53, a recording device 54, an inspection device 55, a
database 56, and an output device 57. The UV camera 51
includes an ultraviolet irradiation lamp 512 in addition to
a general configuration of a digital camera such as a lens
511 and an imaging device. The ultraviolet irradiation
lamp 512 irradiates a visual field of the UV camera 51 with
ultraviolet light. The UV camera 51 shoots a light-
emitting object (UV image) due to the UV ink as the game
token 1 is irradiated with the illuminated ultraviolet
irradiation lamp 512. The visible-light camera 52 includes
a general configuration of a digital camera, such as a lens
521 and an imaging device.
As shown in , a pole P stands on the game
table T. The UV camera 51 is attached to the pole P at a
relatively high position, and is set in an obliquely
downward direction so as to shoot a surface of the table
from above. The visible-light camera 52 is attached to the
pole P at a relatively low position, and is set in a
substantially horizontal direction so as to shoot a good
image of the side surface of the game token 1 placed on the
PAPC-5015US
game table T.
The RFID reader 53 includes an antenna 531 configured
to transmit and receive electromagnetic waves to read the
RFID tag information from the RFID tag 13 in the game token
1. The RFID reader 53 reads the RFID tag information based
on the electromagnetic waves received by the antenna 531.
As shown in , the RFID reader 53 is embedded under
the surface of the game table T.
The recording device 54 records all of a UV image on
the display surface 120 of the game token 1 captured by the
UV camera 51, a visible-light image of the side surface of
the game token 1 captured by the visible-light camera 52,
and the RFID tag information stored in the RFID tag 13 of
the game token 1 read by the RFID reader 53.
The inspection device 55 identifies an image by
performing image recognition processing on the recorded
results by the recording device 54, i.e., a UV image, a
visible-light image, and an RFID tag information recorded
in the recording device 54, thereby determining
authenticity of the game token 1. The inspection device 55
reads the code information based on the UV image on the
display surface 120 and reads side-surface information (the
color of the colored layer) based on a visible-light image
of the side surface of the game token 1. The inspection
PAPC-5015US
device 55 is equipped with a machine learning model for
recognizing a UV image captured by the UV camera 51 and a
visible-light image captured by the visible-light camera 52.
More specifically, the inspection device 55 can perform
image recognition processing using a neural network.
When the code information and the RFID tag
information are the same information, the database 56
stores the code information of the game token 1 that may be
used, in association with any one of or a combination of
the information on the type of the game token 1, the
machine used for manufacturing the game token original
plate 10 of the game token 1, a sequence of manufacture,
time of manufacture, and the manufacturing information.
The inspection device 55 determines whether or not
the recognized code information matches the RFID tag
information read by the RFID reader 53. In the genuine
game token 1, the recognized code information and the RFID
tag information read by the RFID reader 53 should match
each other, and when these pieces of information do not
match each other, the inspection device 55 determines that
the game token 1 is a counterfeit game token 1.
When the code information matches the RFID tag
information, the inspection device 55 further determines
whether or not the code information is stored in the
PAPC-5015US
database 56. In the case where the UV image and the
recognized information in the RFID tag 13 are not stored in
the database 56, the inspection device 55 determine that
the game token 1 is a counterfeit game token 1.
The inspection device 55 further determines whether
the type of the game token 1 associated with the recognized
information in the database 56 matches the type recognized
from the visible-light image of the side surface of the
game token 1. When these types do not match each other,
the inspection device 55 determines that the game token 1
is a counterfeit game token 1.
When the code information and the RFID tag
information are not the same information, the database 56
stores the code information of the game token 1 that may be
used, in association with any one of or a combination of
the information on the type of the game token 1, the RFID
tag information, the machine used for manufacturing the
game token original plate 10 of the game token 1, a
sequence of manufacture, time of manufacture, and the
manufacturing information.
The inspection device 55 determines whether or not a
combination of the code information recognized from a UV
image of the display surface 120, the RFID tag information
read by the RFID reader 53, and information on the type of
PAPC-5015US
the game token 1 recognized from a visible-light image of
the side surface of the game token 1, exists in the
database 56, thereby determining authenticity of the game
token 1.
The inspection device 55 determines that the game
token 1 is a genuine game token 1 except the above
described cases in which the game token 1 is determined to
be counterfeit. The output device 57 outputs a result of
the determination on the authenticity of the game token 1,
i.e., a result of the determination as to whether the game
token 1 is genuine or counterfeit. The output device 57
may be a display device configured to display a result of
the determination using an image, may be a speaker
configured to output a result of the determination using a
sound, or may be a lamp configured to output a result of
the determination using a color. Further, the result of
the determination by the inspection device 55 is recorded
in the recording device 54.
As described above, according to the game token 1 of
the present embodiment, the code information is added to
the ID mark region 121 such that the ID mark region 121 of
the display surface 120 is solidly applied with invisible
ink that is visualized by ultraviolet irradiation, and then
the ID mark region 121 is irradiated with laser light and
is denatured at the irradiated portions to form the marks
PAPC-5015US
122 that are not visualized (do not emit light) even by
ultraviolet irradiation, and such irradiated portions (the
positions of the marks 122) are selected according to the
code information. The code information (first code
information) can be exposed as the marks 122 which does not
emit light by irradiating the ID mark region 121 with
ultraviolet light.
Although the first code information can be formed by
drawing the marks 122 with an invisible ink, in such a case,
only the portions of the marks 122 protrude on the display
surface 120, which may cause wearing out of the marks 122
in the course of using the game token 1. In particular, in
the case where the marks are relatively small in order to
express a lot of information like the marks 122, there is a
possibility that correct information cannot be expressed
due to wearing out. On the other hand, in the present
embodiment, the marks 122 constituting the first code
information do not protrude on the display surface 120, and
thus there is no possibility of loss of the marks 122 due
to wearing out.
In addition, in the game token 1 of the present
embodiment, the marks 123 are also printed with an
invisible ink on the display surface 120 as the second code
information. While the first code information is
information for uniquely identifying the game token
PAPC-5015US
original plate 10, the second code information is
information for uniquely identifying the position on the
game token original plate 10, and a combination of these
pieces of information constitutes a unique ID that uniquely
identifies the game token 1. With this configuration, the
same printing can be performed on all the game token
original plates 10 at the time of printing the marks 123 of
the second code information and the invisible ink region
120, and thus the same printing plate can be used for all
the game token original plates 10.
Since the first code information for uniquely
identifying the game token original plate 10 is added by
laser irradiation to the game token original plate 10 for
which the application of the invisible ink has been
completed, the same first code information can be
efficiently added to a plurality of game tokens 1 cut out
from the same game token original plate 10.
In addition, since the invisible ink is transparent,
the code information cannot be visually observed during a
normal use (under visible light). Thus, the design of the
display surface 120 of the game token 1 is not affected,
and also security is improved.
( Modification)
In the above embodiment, a UV ink that emits
PAPC-5015US
fluorescence by irradiating ultraviolet light is employed
as an invisible ink, but the invisible ink is not limited
thereto, and may be an infrared absorbing material, for
example. When an infrared absorbing material is employed
as an invisible ink, an ink formed of an infrared absorbing
material is coated (printed) on the entire surface of the
ID mark region 121, and laser light is applied to the
portions corresponding to the first code information in the
ID mark region 121 that has been entirely printed with the
infrared absorbing material, so that the irradiated
portions are denatured to form the marks 122.
In this case, the denatured portions at the marks 122
cannot absorb infrared rays. Therefore, when the ID mark
region 121 is irradiated with infrared rays to read the
first code information, the marks 122 reflects the infrared
rays without absorbing the infrared rays, while an area
excluding the marks 122 in the ID mark region 121 absorbs
the infrared rays with no reflection or with a small amount
of reflection. With this configuration, the first code
information composed of the marks 122 can be read by
shooting the ID mark region 121 with an infrared camera.
For this purpose, the inspection system includes an
infrared camera in place of the UV camera 51. The infrared
camera includes an infrared irradiation light configured to
emit infrared rays and an infrared detection element
PAPC-5015US
configured to detect an infrared image from a subject
through a lens to generate an infrared image.
In the above embodiment, the marks 123 are formed by
partially irradiating the ID mark region 121 with laser
light to denature the invisible ink at the irradiated
portions, but the invisible ink may be removed by laser
irradiation at the irradiated portions. In this case,
laser irradiation needs to be stronger than in the above
embodiment.
Even in the case where the marks 122 are formed by
removing the invisible ink, the arrangement of the marks
122 is visualized by irradiating the ID mark region 121
with ultraviolet light when the invisible ink is a UV ink
in the same manner as the above embodiment, and the
arrangement of the marks 122 is visualized by irradiating
the ID mark region 121 with infrared rays when the
invisible ink is an ink of an infrared absorbing material.
is a cross-sectional view of a game token 1'
according to a modification. The game token 1' has a
multilayer structure formed of stacked plastic layers with
different colors, in which at least a colored layer
( designated color layer) 11 is provided as an intermediate
layer, and light-colored layers (common color layer) 12 are
stacked on both sides of the intermediate colored layer 11.
PAPC-5015US
It is desirable that the color of the light-colored layers
12 is lighter than the color of the colored layer 11. In
this way, the game token 1' has a multilayer structure
including the colored layer 11 and the light-colored layers
12 that are stacked on both sides of the intermediate
colored layer 11 such that a striped pattern in the
stacking direction is formed on the side surface of the
game token 1', thereby enabling identification of the type
of the game token 1' depending on the color of the colored
layer 11.
In this modification, as shown in , the
colored layer 11 is formed by a plurality of layers (three
layers in ) that are colored with a designated color,
but individual layers in the three-layer structure cannot
be visually observed since the layers colored with a
designated color are bonded to each other by
thermocompression bonding. A part of the intermediate
layer among the three layers of the colored layer 11 is
provided with a hollow B, and the RFID tag 13 is embedded
in the hollow B.
In the same manner as the above embodiment, a number
representing the type (value) of the game token 1' is
printed on the display surfaces 120 of the game token 1',
and transparent layers 16 are provided as the outermost
layers, and the layers are bonded to each other by
PAPC-5015US
thermocompression bonding to form at least a five-layer
structure. The game token 1' is formed such that plastic
sheet members forming the layers (colored layer 11, light-
colored layers 12, and transparent layers 16) are stacked,
an RFID tag 13 is placed in the hollow B, and the stacked
sheet members are thermally bonded to each other into a
closely adhered state (a five-layer structure or the like)
to form a game token original plate 10, and then, the game
token original plate 10 is stamped by a press or the like
into circular-shaped pieces, rectangular-shaped pieces, or
the like.
At the time of stamping out the game token original
plate 10 by a press, a rounding process (rounded corner) is
applied to the edge of each of the outermost transparent
layers 16 by designing the dimensions of a die and a punch
for stamping. With this configuration, the surfaces of the
light-colored layers 12 are deformed and prevented from
being exposed on the side surface of the game token 1'.
Further, the end of the game token 1' is prevented from
being sharp so as not to hurt the hand or not to damage
other game tokens 1'.
As shown in , the game token 1' has a stacked
multi-layer structure, and includes a striped pattern in
the stacking direction that appears sharply on the side
surface of the game token 1', so that the color of the
PAPC-5015US
colored layer 11 (type of the game token 1') and the number
of the game tokens 1' can be easily and accurately
determined by image recognition by the inspection device 55.
is a view showing a configuration for
inspecting the game tokens 1 collected for inspection
according to a modification, and is a block diagram
of an inspection system according to the modification. In
an inspection system 70 of , the same symbols are
given to the same components as those of the inspection
system 50 shown in , and a detailed description
thereof will be omitted. Although a configuration of the
inspection system 70 is similar to that of the inspection
system 50, the inspection system 70 includes a visible-
light camera 58 configured to shoot surface print
information (in particular, the number representing the
type) in addition to the UV camera 51 configured to shoot
the code information printed by the invisible ink. The
visible-light camera 58 has a general configuration of a
digital camera including a lens 581 and an imaging device.
In the same manner as the inspection system 50, the
inspection system 70 includes a UV camera 51 configured to
shoot the code information on the display surface 120 of
the game token 1, a visible-light camera 52 configured to
shoot a striped pattern on the side surface of the game
token 1, an RFID reader 53 configured to read information
PAPC-5015US
in the RFID tag 13 of the game token 1, a recording device
54, an inspection device 55, a database 56, and an output
device 57.
As shown in , the inspection system 70
includes an extrusion device 102 configured to move an
extrusion unit 101 along an arrow Z. The extrusion device
102 moves the extrusion unit 101 along the arrow Z, so that
the stacked game tokens 1 are supplied one by one to a
reading stage 109. On the reading stage 109, the visible-
light camera 58, the UV camera 51, and the visible-light
camera 52 respectively shoot the surface print information,
the code information, and the side surface of the game
token 1, and the RFID reader 53 reads the RFID tag 13
embedded in the game token 1. The game token 1 for which
reading has been completed is pushed out by a succeeding
game token 1 and falls in the direction of an arrow X. The
game token 1 falls in the direction of the arrow X is kept
in a holding stage 110.
A method of determining authenticity by the
inspection device 55 may be the same as in the above
embodiment. Although the surface print information and the
code information are printed on both of the two display
surfaces of the game token 1 to be inspected by the
inspection system 70, in the case where the surface print
information and the code information of the game token 1
PAPC-5015US
are provided on one side of the game token 1, the UV camera
51 and the visible-light camera 58 may be provided on both
of the front side and the back side. With this
configuration, the surface print information and the code
information printed on only one side of the game token 1
can be shot respectively by the UV camera 51 and the
visible-light camera 58 provided on at least one of the
front side and the back side.
Although the RFID tag 13 stores the RFID tag
information in addition to the code information printed
with the invisible ink, and the RFID reader 53 reads the
RFID tag information in the game token 1 according to the
above embodiment, an ID code (side ID) may be printed on
the side surface of the game token 1 instead of or in
addition to the RFID tag information stored in the RFID tag
13. The side ID may be printed with an ordinary ink or may
be printed with an invisible ink.
In the case where the side ID is added, the contents
of the side ID are stored in the database 56 in association
with the code information in the same manner as in the
above embodiment, and the inspection device 55 refers to
the database 56 to determine whether or not a recognized
side ID is stored in the database 56.
Although the code information is expressed by
PAPC-5015US
arrangement of the marks 122 and the marks 123 in the game
token 1 according to the above embodiment, the code
information may be expressed by numbers or letters.
Likewise, the above described side ID may be expressed by
arrangement of marks or may be expressed by numbers or
letters.
Although the first code information is information
for identifying the game token original plate 10 according
to the game token 1 of the above embodiment, the first code
information may be identification information for uniquely
identifying the game token 1. In addition, the code
information may be formed of only the first code
information without second code information.
At least the following invention is disclosed by the
above embodiment and its modifications.
(1) An inspection system for a game token used in a
table game, including:
a camera configured to shoot the game token;
a recording device configured to record an image of
the game token shot by the camera; and
an inspection device configured to determine
authenticity of the game token using the image recorded in
the recording device,
wherein the game token includes code information,
the inspection device determines authenticity of the
PAPC-5015US
game token by recognizing the code information from the
image recorded in the recording device,
the game token includes an invisible ink region on
which an invisible ink is coated, and
the code information is added to the game token by
irradiating the invisible ink region with laser light so
that the invisible ink constituting the invisible ink
region is partially denatured or removed.
(2) The inspection system according to (1), wherein
the code information is a unique ID capable of individually
identifying the game token or a unique ID capable of
individually identifying a group to which the game token
belongs.
(3) The inspection system according to (1), wherein
the code information is associated with any one of a
machine used for manufacturing the game token, a sequence
of manufacture, time of manufacture, and manufacturing
information in a database.
(4) The inspection system according to any one of (1)
to (3),
wherein the game token includes an RFID tag, and
further includes RFID tag information stored in the RFID
tag or an ID code written on a side surface of the game
token in addition to the code information,
PAPC-5015US
the inspection system further includes a database
configured to associate the code information with the RFID
tag information or the ID code,
the camera is configured to shoot the code
information added to the game token to be inspected, and
the inspection device refers to the database and
compares the code information with the RFID tag information
or the ID code to determine authenticity of the game tokens.
(5) The inspection system according to any one of (1)
to (4), wherein the camera includes a lamp configured to
visualize the invisible ink, and shoots the visualized code
information.
(6) The inspection system according to any one of (1)
to (5), wherein the code information is a code expressed by
a character or a mark.
(7) The inspection system according to any one of (1)
to (6), wherein the invisible ink is transparent.
(8) A game token to which code information for
determining authenticity of the game token is added,
including:
an invisible ink region formed of a UV ink or an
infrared absorbing material,
wherein the code information is added by irradiating
PAPC-5015US
the invisible ink region with laser light so that the UV
ink or the infrared absorbing material constituting the
invisible ink region is partially denatured or removed.
(9) The game token according to (8), wherein the code
information is a unique ID capable of individually
identifying the game token or a unique ID capable of
individually identifying a group to which the game token
belongs.
(10) The game token according to (9), wherein the
code information is associated with at least one of a
machine used for manufacturing the game token, a sequence
of manufacture, time of manufacture, and manufacturing
information in a database.
(11) The game token according to any one of (8) to
(10), including an RFID tag, and further including RFID tag
information stored in the RFID tag or an ID code written on
a side surface of the game token in addition to the code
information,
wherein authenticity of the game token is determined
by referring to the database that associates the code
information with the RFID tag information or the ID code,
and comparing the code information with the RFID tag
information or the ID code that is added to the game token
to be inspected for authenticity.
PAPC-5015US
(12) The game token according to any one of (8) to
( 11), wherein the code information is a code expressed by a
character or a mark.
(13) The game token according to any one of (8) to
(12), wherein the invisible ink is transparent.
PAPC-5015US
Claims (17)
1. An inspection system for game tokens for games using a game table, comprising: a recording device configured to record types and authenticity of the game tokens using a camera; and an inspection device configured to determine authenticity of the game tokens using a result recorded by the recording device, wherein each of the game tokens is provided with a unique ID for individual identification in appearance, the inspection device reads the unique ID of a target game token for inspection among the game tokens using the camera, and determines authenticity of the target game token based on the read unique ID, and the unique ID for individual identification or for individual identification in a specific group unit is formed by irradiating an ID mark region that is formed of a UV ink or an infrared absorbing material with laser light to partially denature or remove the UV ink or the infrared absorbing material that forms the ID mark region.
2. The inspection system according to claim 1, wherein the unique ID is associated with any one of a machine used for manufacturing the game tokens, a sequence of manufacture, time of manufacture, and manufacturing information in a database.
3. The inspection system according to claim 1 or 2, wherein each of the game tokens further includes an PAPC-5015US RFID or an ID code aside from the unique ID for individual identification that is provided on an outer layer of the game token, the inspection system further includes a database configured to associate the unique ID provided on the outer layer with the RFID or the ID code, and the inspection device reads the unique ID added to the target game token for inspection using the camera, and determines authenticity of the target game token based on a result of comparison of the read unique ID and the RFID or the ID code with contents of the database.
4. The inspection system according to claim 1 or 2, wherein the inspection device is configured to determine authenticity of the game tokens using a normal camera, and an infrared camera or a UV camera.
5. The inspection system according to claim 1 or 2, wherein the unique ID provided on each of the game tokens is a code expressed by a character or a mark.
6. The inspection system according to claim 1 or 2, wherein the unique ID provided on each of the game tokens is transparent.
7. A game token comprising a unique ID for individual identification provided on an outer layer of the game token, wherein the unique ID is read by a camera and allows determination of authenticity of the game token, and the unique ID for individual identification or for individual identification in a specific group unit is PAPC-5015US formed by irradiating an ID mark region that is formed of a UV ink or an infrared absorbing material with laser light to partially denature or remove the UV ink or the infrared absorbing material that forms the ID mark region.
8. The game token according to claim 7, wherein the unique ID is associated with any one of a machine used for manufacturing the game tokens, a sequence of manufacture, time of manufacture, and manufacturing information by a database.
9. The game token according to claim 7 or 8, further comprising an RFID or an ID code aside from the unique ID for individual identification that is provided on the outer layer of the game token, wherein, by using a database configured to associate the unique ID provided on the outer layer of the game token with the RFID or the ID code, authenticity of the target game token is determined based on a result of comparison of the unique ID assigned to the target game token and the RFID or the ID code with contents of the database.
10. The game token according to any one of claims 7 to 9, wherein the unique ID provided on the game token is a code expressed by a character or a mark.
11. The game token according to any one of claims 7 to 10, wherein the unique ID provided on the game token is transparent.
12. An inspection system for inspecting a game token, comprising: PAPC-5015US a game token that includes an ID mark region entirely covered with an ink, and is provided with code information by irradiating a part of the ID mark region with laser light such that the irradiated part is denatured or removed; a camera for shooting the game token; and an inspection device configured to read the code information and determine authenticity of the game token based on an image shot by the camera.
13. The inspection system according to claim 12, wherein the ink that entirely covers the ID mark region is an invisible ink, the inspection system further includes a lamp configured to irradiate the game token with light for visualizing the invisible ink, and the inspection device reads the code information that has been visualized by the irradiation with the light.
14. A game token comprising: a display surface that displays at least a value of the game token; and an ID mark region provided on the display surface and entirely covered with an ink, wherein a part of the ID mark region is irradiated with laser light so that the irradiated part is denatured or removed to add first code information to the game token.
15. The game token according to claim 14, wherein the ink that entirely covers the ID mark PAPC-5015US region is a UV ink that emits light when irradiated with ultraviolet light, and the part irradiated with laser light is denatured or removed so as not to emit light even when irradiated with ultraviolet light.
16. The game token according to claim 14, wherein the ink that entirely covers the ID mark region is an ink formed of an infrared absorbing material which absorbs infrared rays, and the part irradiated with laser light is denatured or removed so as not to absorb infrared rays.
17. The game token according to claim 14, wherein the game token is manufactured by being cut out from a game token original plate, the game token further includes second code information added with the ink, the first code information is information that uniquely identifies the game token original plate, and the second code information is information that specifies a position in the game token original plate. PAPC-5015US
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017-99903 | 2017-05-19 |
Publications (1)
Publication Number | Publication Date |
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NZ742611A true NZ742611A (en) |
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