Playing card

Abstract

To provide a playing card whose print on the front side is difficult to see through even when viewed through an infrared camera. [Solution] Playing cards have suit and rank printed on one side of the card base paper and a back pattern printed on the back side, and the card base paper has an intermediate layer with a black layer or a color layer similar to black to make it difficult for visible light to pass through. The suit and rank are printed using ink that does not contain carbon, so that the intermediate layer prevents visible light from passing through from the back side, and the suit and rank printed with carbon-free ink are transparent to infrared light, making it difficult to distinguish the suit and rank from the back side using both visible light and infrared light. One or more decks are made up of individual cards cut from the card base paper using a cutting machine.

Description

Technical Field

[0001] The present invention relates to playing cards.

Background Art

[0002] In various playing card games such as poker, baccarat, bridge, or blackjack, a dealer sets one deck or multiple decks of playing cards in a card shoe or the like, and then deals the cards one by one to the game participants. At this time, in order to ensure the fairness of the game, these cards need to be dealt randomly. Therefore, before setting the cards in the card shoe, the game organizer must thoroughly shuffle the playing cards randomly.

[0003] However, when the game organizer shuffles the cards prior to the game, it may take a long time to shuffle, which has been a factor hindering the efficient operation of the game. Also, when the game organizer shuffles the cards, there has been a problem that there is room for fraudulent acts such as card insertion and replacement.

[0004] To solve such problems, International Publication No. 2009 / 069708 proposes shuffled playing cards in which playing cards constituting a predetermined number of decks are individually packaged in a shuffled state. The packaging of these shuffled playing cards is provided with a shuffled playing card ID for accessing on a database the shuffling machine or group of shuffling machines that shuffled the shuffled playing cards as identifiable information.

[0005] Originally, in the printing industry, in addition to the three primary colors, it is essential to use carbon black ink to represent a clearer and darker black for the black parts. Naturally, in the case of playing cards, it is common sense to usually print the black parts with carbon black ink.

Summary of the Invention

[0006] Since carbon has the property of having a high infrared emissivity (absorptivity), carbon black ink will appear black when viewed through an infrared camera.

[0007] In recent years, the miniaturization and high performance of electronic devices have been progressing. Even with a high-performance infrared camera, due to being miniaturized by malicious wrongdoers, there is a risk of being brought into the casino without being noticed from the outside.

[0008] When looking at a normal playing card through a high-performance infrared camera, the printing on the front side where carbon black ink is used can be seen through even from the back side of the playing card. That is, there is a possibility of knowing the rank and suit on the front side when looking from the back.

[0009] An object of the present invention is to provide a playing card in which the printing on the front side is difficult to be seen through even when viewed through an infrared camera.

[0010] A playing card according to one aspect of the present invention has a suit and a rank printed on one side of the card stock, and a back pattern printed on the back side, the card stock has an infrared ray penetration prevention layer containing carbon as an intermediate layer, ink not containing carbon is used for printing the suit and the rank, One or a plurality of sets of the deck are constituted by individual cards cut from the card base paper by a cutting machine.

[0011] According to such an aspect, since the card base paper is provided with an infrared ray transmission prevention layer containing carbon as an intermediate layer, the infrared rays radiated from the printed portion on the front side of the card are absorbed by the intermediate layer and are less likely to pass through to the back side. Further, since an ink containing no carbon is used for printing the suit and rank, the difference between the intensity of the infrared rays radiated from the printed portion and the intensity of the infrared rays radiated from the surrounding area is small. Even if there are infrared rays that are radiated from the printed portion on the front side and are not completely absorbed by the intermediate layer and pass through to the back side, it is extremely difficult to distinguish the suit and rank from the distribution of the trace amount of infrared rays that have passed through. Therefore, it is possible to provide a playing card in which the printing on the front side is difficult to see through even when viewed through an infrared camera.

[0012] In the playing card according to one aspect of the present invention, the back pattern on the back surface of the card base paper may be printed with an ink containing carbon.

[0013] According to such an aspect, since the back pattern of the card is printed with an ink containing carbon, an infrared ray distribution of the same pattern as the back pattern appears on the back side of the card. Therefore, even if there are infrared rays that are radiated from the printed portion on the front side and are not completely absorbed by the intermediate layer and pass through to the back side, the distribution of the trace amount of infrared rays that have passed through is superimposed on and buried in the infrared ray distribution radiated from the back pattern of the card, and it becomes even more difficult to distinguish the printing on the front side even when viewed through an infrared camera.

[0014] ​​​​​​​​​​​​ A playing card according to one aspect of the present invention is printed with a suit and a rank on one side of the card stock, and a back pattern is printed on the back side. The card stock has an infrared ray transmission prevention layer containing carbon as an intermediate layer. The back pattern on the back side of the card stock is printed with ink containing carbon. One or a plurality of sets of a deck are constituted by individual cards cut from the card stock by a cutting machine. constitute a set or multiple sets.

[0015] According to such an aspect, since the card stock is provided with an infrared ray transmission prevention layer containing carbon as an intermediate layer, infrared rays radiated from the front side of the card are absorbed by the intermediate layer and are difficult to transmit to the back side. Furthermore, since the back pattern of the card is printed with ink containing carbon, an infrared ray distribution similar to the back pattern appears on the back side of the card. Therefore, even if there are infrared rays that are radiated from the printed portion on the front side and are not completely absorbed by the intermediate layer and transmit to the back side, the transmitted trace amount of infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern of the card, and it is extremely difficult to distinguish the suit and the rank from such an infrared ray distribution. Therefore, it is possible to provide a playing card in which the printing on the front side is difficult to see through even when viewed through an infrared camera. layer, infrared rays radiated from the front side of the card are absorbed by the intermediate layer and are difficult to transmit to the back side. Furthermore, since the back pattern of the card is printed with ink containing carbon, an infrared ray distribution similar to the back pattern appears on the back side of the card. Therefore, even if there are infrared rays that are radiated from the printed portion on the front side and are not completely absorbed by the intermediate layer and transmit to the back side, the transmitted trace amount of infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern of the card, and it is extremely difficult to distinguish the suit and the rank from such an infrared ray distribution. Therefore, it is possible to provide a playing card in which the printing on the front side is difficult to see through even when viewed through an infrared camera. For this reason, an infrared ray distribution similar to the back pattern appears on the back side of the card. Therefore, even if there are infrared rays that are radiated from the printed portion on the front side and are not completely absorbed by the intermediate layer and transmit to the back side, the transmitted trace amount of infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern of the card, and it is extremely difficult to distinguish the suit and the rank from such an infrared ray distribution. Therefore, it is possible to provide a playing card in which the printing on the front side is difficult to see through even when viewed through an infrared camera. For this reason, an infrared ray distribution similar to the back pattern appears on the back side of the card. Therefore, even if there are infrared rays that are radiated from the printed portion on the front side and are not completely absorbed by the intermediate layer and transmit to the back side, the transmitted trace amount of infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern of the card, and it is extremely difficult to distinguish the suit and the rank from such an infrared ray distribution. Therefore, it is possible to provide a playing card in which the printing on the front side is difficult to see through even when viewed through an infrared camera. even if there are infrared rays that are radiated from the printed portion on the front side and are not completely absorbed by the intermediate layer and transmit to the back side, the transmitted trace amount of infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern of the card, and it is extremely difficult to distinguish the suit and the rank from such an infrared ray distribution. Therefore, it is possible to provide a playing card in which the printing on the front side is difficult to see through even when viewed through an infrared camera. even if there are infrared rays that are radiated from the printed portion on the front side and are not completely absorbed by the intermediate layer and transmit to the back side, the transmitted trace amount of infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern of the card, and it is extremely difficult to distinguish the suit and the rank from such an infrared ray distribution. Therefore, it is possible to provide a playing card in which the printing on the front side is difficult to see through even when viewed through an infrared camera. even if there are infrared rays that are radiated from the printed portion on the front side and are not completely absorbed by the intermediate layer and transmit to the back side, the transmitted trace amount of infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern of the card, and it is extremely difficult to distinguish the suit and the rank from such an infrared ray distribution. Therefore, it is possible to provide a playing card in which the printing on the front side is difficult to see through even when viewed through an infrared camera. even if there are infrared rays that are radiated from the printed portion on the front side and are not completely absorbed by the intermediate layer and transmit to the back side, the transmitted trace amount of infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern of the card, and it is extremely difficult to distinguish the suit and the rank from such an infrared ray distribution. Therefore, it is possible to provide a playing card in which the printing on the front side is difficult to see through even when viewed through an infrared camera. It is possible to provide a playing card in which the printing on the front side is difficult to see through even when viewed through an infrared camera.

[0016] A playing card according to one aspect of the present invention is printed with a suit and a rank on one side of the card stock, and a back pattern is printed on the back side. Ink not containing carbon is used for printing the suit and the rank. The back pattern on the back side of the card stock is printed with ink containing carbon. One or a plurality of sets of a deck are constituted by individual cards cut from the card stock by a cutting machine. constitute one set or a plurality of sets.

[0017] According to such an aspect, since ink containing no carbon is used for printing the suit and rank, the intensity of infrared rays radiated from the printed portion and the intensity of infrared rays radiated from the surrounding area are small, and even if there is infrared light transmitted to the back side among the infrared rays radiated from the printed portion on the front side, it is difficult to distinguish the suit and rank from the transmitted minute infrared ray distribution. Further, since the back pattern of the card is printed with ink containing carbon, a clear infrared ray distribution with unevenness of the same pattern as the back pattern appears on the back side of the card. Therefore, even if there is infrared light transmitted to the back side among the infrared rays radiated from the printed portion on the front side, the transmitted minute infrared ray distribution is superimposed and buried in the infrared ray distribution radiated from the back pattern of the card, and it has become extremely difficult to distinguish the suit and rank from such an infrared ray distribution. Therefore, it is possible to provide a playing card in which the front side printing is difficult to see through even when viewed through an infrared camera. A shuffling playing card according to an aspect of the present invention is

[0018] a shuffling playing card in which a predetermined set of playing cards having any of the above-described features is shuffled by a shuffling machine to form one set of shuffling playing cards, and the one set of shuffling playing cards is individually packaged and sealed.

[0019] According to such an aspect, prior to the game, it is not necessary for the game organizer to perform shuffling over a long period of time, and it is possible to provide a shuffling playing card in which there is no room for illegal acts such as inserting and removing or replacing cards. ​​​​​​​​

[0020] In a shuffling playing card according to one aspect of the present invention, the individually packaged and sealed shuffling playing cards may be individually assigned different shuffling playing card IDs as ID codes.

[0021] According to such an aspect, for example, if the shuffling playing card ID is associated with information that can identify the shuffling machine or group of shuffling machines that shuffled the shuffling playing cards, the shuffling playing card ID is individually packaged and sealed. Since it is given to the shuffling playing cards, if there is some defect in the playing cards and the cause of the defect is considered to be in the shuffling machine, the manufacturer can easily identify which shuffling machine or group of shuffling machines the defect occurred in and take prompt countermeasures.

[0022] In a playing card according to one aspect of the present invention, different sheet IDs are printed on the card stock for each single or multiple card stocks, The sheet ID may be printed on the printed surface of the cards that make up the deck.

[0023] According to such an aspect, since the card stock on which different sheet IDs are printed for each single or multiple card stocks is cut to create one or more decks of playing cards, the information about when the cards were printed and when they were inspected can be traced back to the distribution history of the playing cards and confirmed in a database. As a result, malicious fraudsters ​ Even if the content of the playing card is replaced with a set of cards whose arrangement is known, even so, by reading the sheet ID from the content card and checking the history on the database, it becomes possible to confirm whether it is a genuine product that has been correctly manufactured and distributed, on a sheet-by-sheet basis. It becomes possible.

[0024] In a playing card according to one aspect of the present invention, different sheet IDs are printed on each one or more card base papers, and, the sheet ID may be printed on a card other than the cards constituting the deck set.

[0025] In a shuffle playing card according to one aspect of the present invention, different sheet IDs are printed on each one or more card base papers, and, the sheet ID is printed on the printing surface of the cards constituting the deck set, on the individually packaged and sealed shuffle playing cards, different shuffle playing card IDs are assigned as ID codes, and, the sheet ID of a predetermined set of cards constituting the shuffle playing card and the shuffle trump ID assigned to the shuffle playing card may be associated with each other on a database basis. and, they may be associated with each other on a database basis.

[0026] A playing card according to one aspect of the present invention, has a suit and a rank printed on one side of a card base paper, and a back pattern printed on the back side, the card base paper is provided with an intermediate layer having a black layer or a color layer similar to black for making it difficult to pass visible light therethrough, and the suit and rank are printed using ink that does not contain carbon, by printing, thereby. Prevent visible light from passing through from the back side with the intermediate layer, and the suit and rank printed by ink not containing carbon transmit infrared rays, making it difficult to distinguish the suit and rank from the back side with both visible light and infrared rays, One set or several sets of the deck are composed of individual cards cut from the card stock by a cutting machine.

[0027] In a playing card according to one aspect of the present invention, The back pattern of the card stock may be printed with ink containing carbon to prevent infrared rays from passing through from the back side with the carbon-containing ink of the back pattern.

[0028] In a playing card according to one aspect of the present invention, The intermediate layer may be configured to prevent the transmission of infrared rays containing carbon.

[0029] A shuffled playing card according to one aspect of the present invention, A predetermined set of playing cards having any of the above-described features is shuffled by a shuffling machine to form a set of shuffled playing cards.

[0030] In a shuffled playing card according to one aspect of the present invention, Different shuffled playing card IDs may be assigned as ID codes to the shuffled playing cards individually.

[0031] A table game system according to one aspect of the present invention, A playing card having a suit and a rank printed on one side, A gaming table for playing a game using the playing card,​​​​​ Card distribution for pulling out each of the playing cards on the gaming table A table game system comprising: a device for The playing card is printed with the suit and rank using ink that does not contain carbon and the codes representing the suit and rank are printed with ink that is invisible to the naked eye and the card distribution device has a function of reading the code or rank printed with the invisible ink and determining and displaying the winning or losing result of each game from the information of the rank.

Brief Description of the Drawings

[0032]

Figure 1

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DETAILED DESCRIPTION OF THE INVENTION

[0033] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In each figure components having the same function are denoted by the same reference numerals, and detailed description of the components with the same reference numerals will not be repeated.

[0034] A table game system according to an embodiment includes a playing card 2 (see FIG. 1) having a suit 21a and a rank 21b printed on one surface, a game table for playing a game using the playing card 2, and a card distribution device for drawing out the playing card 2 one by one on the game table.

[0035] ​​As will be described later, on the playing card 2, the suit 21a and the rank 21b are printed with ink that does not contain carbon. In addition, on the playing card 2, a code representing the suit 21a and the rank 21b is printed with ink that is invisible to the naked eye (for example, ultraviolet light-emitting ink that emits light when irradiated with ultraviolet light or a DNA-containing paint that emits a specific wavelength of light with respect to light).

[0036] The card distribution device has a function of reading a code or rank printed with invisible ink and determining and displaying the win / loss result of each game from the information of the rank. As such a card distribution device, for example, a card shooter device described in International Publication No. 2012 / 053179 or a card shooter device described in International Publication No. 2013 / 161284 can be used.

[0037] Next, the structure of the playing card 2 according to an embodiment will be described. FIG. 1 is an exploded view of the playing card 2 according to an embodiment. FIG. 2 is a view showing an enlarged part of the cross section of the playing card 2 shown in FIG. 1.

[0038] As shown in FIGS. 1 and 2, in the playing card 2 according to the present embodiment, the suit 21a and the rank 21b are printed on one side, the back pattern 29 is printed on the back surface, and an infrared ray transmission prevention layer 28 is provided as an intermediate layer.

[0039] In the present embodiment, the infrared ray transmission prevention layer 28 as the intermediate layer contains carbon. Since carbon has the characteristic of having a high emissivity (absorptivity) of infrared rays, as shown in FIG. 2, the infrared rays radiated from the printed portion on the surface (for example, the sheet ID 31 described later) It is absorbed by the infrared ray shielding layer 28 as the intermediate layer, and it becomes difficult to transmit to the back side. In this specification, "visible light" means radiation that enters the eye and can cause a visual sensation. "Infrared ray" means radiation whose wavelength of the monochromatic light component is longer than the wavelength of visible radiation (visible light) and is shorter than approximately 1 nm, according to the definition of JIS Z8120:2001.

[0040] Note that the infrared ray shielding layer 28 is not limited to an embodiment including a material that absorbs infrared rays such as carbon, as long as it can prevent the transmission of infrared rays. For example, it may be an embodiment including a material that reflects infrared rays such as aluminum foil.

[0041] In the playing card 2 according to the present embodiment, an ink containing no carbon is used for the printed portions of the suit 21a and the rank 21b. Using an ink containing no carbon is deviated from common sense, but since pitch black is not required for the rank, suit, or pattern of the playing card, there is no problem even if an ink containing no carbon is used. Since an ink containing no carbon is used for the printed portions of the suit 21a and the rank 21b, the difference in the intensity of infrared rays radiated from the printed portions 21a, 21b and the intensity of infrared rays radiated from the surrounding area is small. Even if there are infrared rays that are radiated from the printed portions 21a, 21b on the front side and are not completely absorbed by the intermediate layer 28 and transmit to the back side, it is extremely difficult to discriminate the shapes of the suit 21a and the rank 21b from the transmitted minute amount of infrared ray distribution. amount of infrared rays.

[0042] Further, in the playing card 2 according to the present embodiment, the back pattern 29 of the card contains carbon. It is printed with invisible ink (for example, carbon black ink). Therefore, as shown in FIG. 2 on the back side of the card, an infrared distribution with the same pattern as the back pattern 29 appears. Thus even if there is infrared radiation emitted from the printed portion on the front side (for example, sheet ID 31) and transmitted to the back side without being completely absorbed by the intermediate layer 28, the transmitted trace amount of infrared radiation distribution is superimposed on and buried in the infrared radiation distribution emitted from the back pattern 29 of the card, making it even more difficult to distinguish the front - side printing 31 even when viewed through an infrared camera .

[0043] FIG. 3(a) is a diagram showing the front surface of the card 21 that constitutes a deck set among the playing cards 2 according to an embodiment, and FIG. 3(b) is a diagram showing the back surface thereof. FIG. 4(a) is a diagram showing the front surface of the card 22 other than the cards that constitute a deck set among the playing cards 2 according to an embodiment, and FIG. 4(b) is a diagram showing the back surface thereof. As shown in FIG. 3, one set of playing cards 2 according to the present embodiment includes, as the cards 21 that constitute a deck set, four suits 21a (that is, spades, clubs, diamonds, hearts) and thirteen ranks 21b (that is, A (ace), 2, 3, 4, 5, 6, 7,

[0044] 8, 9, 10, J (jack), Q (queen), K (king)), and has 4×13 = 52 cards formed by the combination thereof. As shown in FIG. 4, one set of playing cards 2 according to the present embodiment further includes a "joker" card 22 as a card other than the cards that constitute a deck set of the deck. 8, 9, 10, J (jack), Q (queen), K (king)) and consists of 4×13 = 52 cards having combinations of.

[0045] Also, as shown in FIG. 4, one set of playing cards 2 according to the present embodiment further has a "joker" card 22 as a card other than the cards that constitute a deck set of the deck. ​​There is. The "Joker" card 22 included in a set of playing cards 2 may be one card or two cards. The "Joker" card 22 is a card that is removed and discarded before the shuffling process when creating the shuffled playing cards. It may be, or there may be two. The "Joker" card 22 is a card that is removed and discarded before the shuffling process when creating the shuffled playing cards. When creating the shuffled playing cards, it is a card that is removed and discarded before the shuffling process. That's it.

[0046] A set of playing cards 21, 22 according to the present embodiment is formed by individually cutting from a single card stock 20 (see FIG. 6) using a cutting machine. That's it.

[0047] As shown in FIGS. 3 and 4, common sheet IDs 31, 32 are printed on the front surface of each of the set of playing cards 21, 22, and a common back pattern 29 is printed on the back surface. There is. The sheet IDs 31, 32 may be a character code consisting of a plurality of numbers, alphabets, and symbols, or may be a barcode or two-dimensional code in which the character code is encoded. There is. The sheet IDs 31, 32 may be a character code consisting of a plurality of numbers, alphabets, and symbols, or may be a barcode or two-dimensional code in which the character code is encoded. It may be, or it may be a barcode or two-dimensional code in which the character code is encoded. That's it.

[0048] As shown in FIG. 3, the sheet ID 31 printed on the card 21 constituting the deck of cards may be printed with ink that is invisible to the human eye (for example, transparent UV ink), or may be printed with ink that is visible to the human eye (for example, black ink). When the sheet ID 31 is printed with ink that is invisible to the human eye (for example, transparent UV ink), it looks the same as a conventional card, and the user of the card can use the card without any discomfort. On the other hand, when the sheet ID 31 is printed with ink that is visible to the human eye (for example, black ink), although it may make the user of the card feel uncomfortable, since the sheet ID 31 is just an ID code, there is no particular problem in the game. It may be printed with ink that is invisible to the human eye (for example, transparent UV ink), or may be printed with ink that is visible to the human eye (for example, black ink). There is. When the sheet ID 31 is printed with ink that is invisible to the human eye (for example, transparent UV ink), it looks the same as a conventional card, and the user of the card can use the card without any discomfort. On the other hand, when the sheet ID 31 is printed with ink that is visible to the human eye (for example, black ink), although it may make the user of the card feel uncomfortable, since the sheet ID 31 is just an ID code, there is no particular problem in the game. That's it. That's it. ), although it may make the user of the card feel uncomfortable, since the sheet ID 31 is just an ID code, there is no particular problem in the game. That's it. isn't it.

[0049] Also, as shown in FIG. 4, a card 22 other than the cards constituting the deck is printed with Sheet ID 32 is printed with ink that is invisible to the human eye (for example, transparent UV ink). It may be printed in ink that is visible to the human eye (e.g., black ink). If it is printed in ink that is visible to the human eye (e.g. black ink), During the manufacturing process, when the manufacturer inspects the quality of the printed card stock, It is easy to check the host ID32.

[0050] As shown in FIG. 10, the sheet IDs 31 and 32 printed on the playing cards 21 and 22 are 2 is a record of the printing date of the sheet ID on the original card base paper 20 and an individual playing card The database will link the cut date records to either or both of the cut dates for cards 21 and 22. These are then stored in a computer.

[0051] FIG. 8 shows a shuffled playing card 12 according to the present embodiment, in which the packaging 11 is shuffled. FIG. 7 shows the shuffled playing cards 12 before being sealed with the rule 13. A seal for sealing the package 11 of the shuffled playing cards 12 according to the embodiment Shuffled playing card number 13 with shuffled playing card ID 13a FIG. 12 is a diagram showing

[0052] The shuffled playing cards 12 according to the present embodiment are the same as the above-mentioned playing cards 2. Multiple decks of cards (for example, 4 or 8 decks) Each set is made up of 100 cards (10 ... Each playing card 12 is assigned a different shuffling playing card ID 13a for each set. It is assigned as a D code. In the illustrated example, the shuffling playing card 12 is stored in a box-shaped package 11, and its lid is sealed by a seal 13. The shuffling playing card ID 13a is encoded as a barcode and printed on the seal 13 that seals the package 11.

[0053] As shown in FIG. 10, the sheet ID 31 of the playing card 2 that constitutes the shuffling playing card 12 and the shuffling playing card ID 13a are stored in a database associated with each other. Also, in the example shown in FIG. 10, the shuffling playing card ID 13a stores a shuffling machine ID that identifies the shuffling machine or group of shuffling machines that shuffled the shuffling playing card 12, and the shuffling date, in a database associated with each other.

[0054] Next, a method for manufacturing the playing card 2 and the shuffling playing card 12 according to the present embodiment will be described. FIG. 5 is a flowchart showing a method for manufacturing the playing card 2 and the shuffling playing card 12 according to the present embodiment.

[0055] In the manufacturing process of the playing card 2 and the shuffling playing card 12 according to the present embodiment, it is preferable that consistent process management is performed by a process management system from order reception to shipment. In the present embodiment, a manufacturing method using such a process management system will be described.

[0056] First, a card base paper 20 having an infrared transmission prevention layer 28 as an intermediate layer is prepared. And then, as shown in FIGS. 5 and 6, as a printing process, by a printing machine, a suit 21a and a rank 21b are printed on the front surface of the card base paper 20, and a back pattern 29 is printed on the back surface (step S40). In the present embodiment, for printing the suit 21a and the rank 21b, an ink containing no carbon is used. Also, for printing the back pattern 29, an ink containing carbon is used.

[0057] In the example shown in FIG. 6, 52 cards 21 consisting of a combination of 4 suits and 13 ranks, 1 "Joker" card 22, and 3 other cards 23, a total of 56 cards, are printed in a matrix arrangement of 8 rows × 7 columns.

[0058] As a modification, as shown in FIG. 7, 52 cards 21 consisting of a combination of 4 suits and 13 ranks for 2 decks and 1 other card 23, a total of 1 05 cards may be printed in a matrix arrangement of 7 rows × 15 columns.

[0059] Next, as a sheet ID assigning process, by a process management system, different sheet IDs are assigned to each one or a plurality of card base papers, and sheet IDs 31 and 32 are printed on the front surface of the card base paper 20 by a printing machine (step S41). Also, by the process management system, the sheet IDs 31 and 32 and the printing dates of the sheet IDs 31 and 32 on the card base paper 20 are stored in association with each other in a data base (see FIG. 10). Although not shown, the sheet IDs 31 and 32 may be stored in a database in association with one or two or more of a factory name, a production line, and a customer name (casino name). ​​​

[0060] In this embodiment, on the card 21 that constitutes the deck set, a sheet ID 31 is printed with ink that is invisible to the human eye ( for example, transparent UV ink). As a result, the cards 21 that constitute the deck set look the same as conventional cards, and the user of the cards can use the cards without any discomfort. Note that the sheet ID 31 may be printed only on specific cards (for example, the Ace of Spades) among the cards 21 that constitute the deck set or may be printed on all the cards.

[0061] On the other hand, on the cards 22 and 23 other than the cards that constitute the deck set, a sheet ID 32 is printed with ink that is visible to the human eye ( for example, black ink). Thereby, when the manufacturer inspects the quality of the printed card stock, it is possible to easily confirm the sheet ID.

[0062] Note that in this embodiment, after the printing process (step S40), the sheet ID assigning process ( step S41) is performed, but it is not limited to this, and after the sheet ID assigning process (step S4 1), the printing process (step S40) may be performed.

[0063] Next, the card stock 20 that has undergone the printing process (step S40) and the sheet ID assigning process (step S41) is cut into individual cards 21, 22, and 23 by a cutting machine ( step S42). By removing the cards 22 and 23 other than the cards that constitute the deck set from the cut cards, playing cards 21 for one deck (two decks from the card stock 20 shown in FIG. 7) are created.

[0064] Before being shuffled by the shuffling machine described below or during shuffling, the process management system reads the sheet ID 31 from the playing cards 21 that make up the deck and stores it in the database in association with the shuffling machine (or group of shuffling machines) and the date and time of shuffling (see Fig. 10).

[0065] Next, as the shuffling process, a plurality of decks of playing cards 21 (for example, 4 decks or 8 decks) are shuffled by the shuffling machine to form a set of shuffled playing cards 12 (step S43). As the shuffling machine, for example, the shuffling machine described in International Publication No. WO2009 / 069708 can be used.

[0066] Next, the set of shuffled playing cards 12 that have undergone the shuffling process (step S43) is packaged by the packaging machine (step S44). In the present embodiment, as shown in Fig. 8, the set of shuffled playing cards 12 is stored in a box-shaped package 11. The material of the package 11 is not particularly limited and may be paper or a resin film. As shown in Fig. 7, the lid of the package 11 is sealed with a seal 13.

[0067] Next, the process management system generates a different shuffled playing card ID for each set of shuffled playing cards, and assigns a shuffled playing card ID 13a as an ID code to the set of shuffled playing cards 12 (step S45). In the illustrated example, the shuffled playing card ID 13a is encoded as a barcode and printed on the seal 13 that seals the lid of the package 11 by the printing machine.

[0068] In the example shown, in addition to the shuffle playing card ID 13a, a specification sheet 13b is printed on the seal 13. The specification sheet 13b describes any information such as, for example, the manufacturing number, product number, product name, color, and manufacturing date of this shuffle playing card. Moreover, by the process management system, the sheet ID 31 read from the playing card 21 that constitutes the deck before the shuffle process (step S43) is associated and stored in a database with the shuffle playing card ID 13a of the set of shuffle playing cards 12 to which the deck belongs (see FIG. 10). In the example shown, one set of shuffle playing cards 12 is constituted from the playing cards 21 for four decks, and four sheet IDs 31 are associated and stored in the database for each shuffle playing card ID 13a. Also, by the process management system, the shuffle machine ID and the shuffle date that identify the shuffle machine or the group of shuffle machines that shuffled the shuffle playing card 12 are associated and stored in the database with the shuffle playing card ID 13a. In the example shown, in addition to the shuffle playing card ID 13a, a specification sheet 13b is printed on the seal 13. The specification sheet 13b describes any information such as, for example, the manufacturing number, product number, product name, color, and manufacturing date of this shuffle playing card.

[0069] Also, by the process management system, the sheet ID 31 read from the playing card 21 that constitutes the deck before the shuffle process (step S43) is associated and stored in a database with the shuffle playing card ID 13a of the set of shuffle playing cards 12 to which the deck belongs. Moreover, by the process management system, the sheet ID 31 read from the playing card 21 that constitutes the deck before the shuffle process (step S43) is associated and stored in a database with the shuffle playing card ID 13a of the set of shuffle playing cards 12 to which the deck belongs (see FIG. 10). In the example shown, one set of shuffle playing cards 12 is constituted from the playing cards 21 for four decks, and four sheet IDs 31 are associated and stored in the database for each shuffle playing card ID 13a. Also, by the process management system, the shuffle machine ID and the shuffle date that identify the shuffle machine or the group of shuffle machines that shuffled the shuffle playing card 12 are associated and stored in the database with the shuffle playing card ID 13a. In the example shown, one set of shuffle playing cards 12 is constituted from the playing cards 21 for four decks, and four sheet IDs 31 are associated and stored in the database for each shuffle playing card ID 13a. Also, by the process management system, the shuffle machine ID and the shuffle date that identify the shuffle machine or the group of shuffle machines that shuffled the shuffle playing card 12 are associated and stored in the database with the shuffle playing card ID 13a. In the example shown, one set of shuffle playing cards 12 is constituted from the playing cards 21 for four decks, and four sheet IDs 31 are associated and stored in the database for each shuffle playing card ID 13a. Also, by the process management system, the shuffle machine ID and the shuffle date that identify the shuffle machine or the group of shuffle machines that shuffled the shuffle playing card 12 are associated and stored in the database with the shuffle playing card ID 13a. In the example shown, one set of shuffle playing cards 12 is constituted from the playing cards 21 for four decks, and four sheet IDs 31 are associated and stored in the database for each shuffle playing card ID 13a. Also, by the process management system, the shuffle machine ID and the shuffle date that identify the shuffle machine or the group of shuffle machines that shuffled the shuffle playing card 12 are associated and stored in the database with the shuffle playing card ID 13a. Also, by the process management system, the sheet ID 31 read from the playing card 21 that constitutes the deck before the shuffle process (step S43) is associated and stored in a database with the shuffle playing card ID 13a of the set of shuffle playing cards 12 to which the deck belongs. In the example shown, one set of shuffle playing cards 12 is constituted from the playing cards 21 for four decks, and four sheet IDs 31 are associated and stored in the database for each shuffle playing card ID 13a. Also, by the process management system, the shuffle machine ID and the shuffle date that identify the shuffle machine or the group of shuffle machines that shuffled the shuffle playing card 12 are associated and stored in the database with the shuffle playing card ID 13a. Moreover, by the process management system, the sheet ID 31 read from the playing card 21 that constitutes the deck before the shuffle process (step S43) is associated and stored in a database with the shuffle playing card ID 13a of the set of shuffle playing cards 12 to which the deck belongs (see FIG. 10). In the example shown, one set of shuffle playing cards 12 is constituted from the playing cards 21 for four decks, and four sheet IDs 31 are associated and stored in the database for each shuffle playing card ID 13a. Also, by the process management system, the shuffle machine ID and the shuffle date that identify the shuffle machine or the group of shuffle machines that shuffled the shuffle playing card 12 are associated and stored in the database with the shuffle playing card ID 13a.

[0070] According to the present embodiment as described above, as shown in FIG. 1, since the infrared ray shielding layer 28 containing carbon is provided on the card stock 20 as an intermediate layer, the infrared rays radiated from the printed portion on the front side of the card are absorbed by the intermediate layer 28 and are difficult to transmit to the back side. Furthermore, since ink not containing carbon is used for printing the suit 21a and the rank 21b, the difference between the intensity of the infrared rays radiated from the printed portion and the intensity of the infrared rays radiated from the surrounding area. According to the present embodiment as described above, as shown in FIG. 1, since the infrared ray shielding layer 28 containing carbon is provided on the card stock 20 as an intermediate layer, the infrared rays radiated from the printed portion on the front side of the card are absorbed by the intermediate layer 28 and are difficult to transmit to the back side. According to the present embodiment as described above, as shown in FIG. 1, since the infrared ray shielding layer 28 containing carbon is provided on the card stock 20 as an intermediate layer, the infrared rays radiated from the printed portion on the front side of the card are absorbed by the intermediate layer 28 and are difficult to transmit to the back side. Furthermore, since ink not containing carbon is used for printing the suit 21a and the rank 21b, the difference between the intensity of the infrared rays radiated from the printed portion and the intensity of the infrared rays radiated from the surrounding area. Furthermore, since ink not containing carbon is used for printing the suit 21a and the rank 21b, the difference between the intensity of the infrared rays radiated from the printed portion and the intensity of the infrared rays radiated from the surrounding area. Therefore, even if infrared rays are emitted from the printed portion on the front side and are not completely absorbed by the intermediate layer 28, Even if infrared rays penetrate through the back side without being reflected, the distribution of the small amount of infrared rays that penetrated the back side is It is extremely difficult to distinguish between rank 21a and rank 21b. Even if the playing card 2 is damaged, the printing on the front side is unlikely to be visible through the card.

[0071] According to the present embodiment, the back pattern 29 on the back surface of the card base paper 20 is made of ink containing carbon. Since the card is printed by a printer, the back of the card has the same pattern as the back pattern 29, as shown in Figure 2. Therefore, the infrared distribution is as follows: Even if some infrared rays are not absorbed by the intermediate layer 28 and pass through to the back side, the small amount of infrared rays that pass through The infrared distribution is superimposed on and buried in the infrared distribution emitted from the back of the card 29. Even when viewed through an infrared camera, it is much more difficult to distinguish the printing on the front side. It has become.

[0072] According to the present embodiment, a predetermined set of the above-mentioned playing cards 2 is shuffled by a shuffle machine. A set of shuffled playing cards 12 is assembled by shuffling the cards by The 12 playing cards are individually wrapped and sealed, so you can easily read them before playing. This eliminates the need for the event organizer to spend a lot of time shuffling cards, and makes it easy to insert and remove cards. To provide shuffled playing cards that leave no room for cheating such as swapping. can.

[0073] According to this embodiment, the shuffled playing cards 1 are individually wrapped and sealed. 2 is assigned a different shuffle playing card ID13a as an ID code. Since it is present, for example, as shown in FIG. 10, the shuffle playing card ID 13 is associated with information that can identify the shuffling machine or group of shuffling machines that performed the shuffling of the shuffle playing card 12 If it is associated with information that can identify the shuffling machine or group of shuffling machines, when there is some defect in the playing card and it is considered that the cause of the defect is in the shuffling machine, it becomes possible for the manufacturer to easily identify which shuffling machine or group of shuffling machines the defect occurred in and take prompt countermeasures .

[0074] Also, according to the present embodiment, since the card stock 20 with different sheet IDs 31 printed for each one or more sheets of the card stock 20 is cut to create one or more decks of playing cards 21, it becomes possible to trace back the distribution history of the playing cards up to information such as when the cards were printed or when they were inspected and confirm it on the database. Thereby, even when the contents of the packaged shuffle playing cards 12 are replaced with a set of cards whose order is known by a malicious fraudster, by reading the sheet ID 31 from the cards inside and checking the history on the database , it becomes possible to confirm whether they are genuine products that were correctly manufactured and distributed on a sheet-by-sheet basis . Also, by printing different sheet IDs 31 for each one or more sheets of the card stock 20 , it becomes possible to manage the ID of the card stock 20 in the factory. For example, even when the card stock 20 is discarded during the process , it is possible to manage in the database at which stage it was discarded

[0075] Also, by printing different sheet IDs 31 for each one or more sheets of the card stock 20 , it becomes possible to manage the ID of the card stock 20 in the factory. For example, even when the card stock 20 is discarded during the process and it is possible to manage in the database at which stage it was discarded This is possible. As a result, it becomes possible to grasp the yield at each process in the manufacturing stage. Also, it becomes possible to determine whether cards of the cardstock that are judged as defective and discarded in each process are accidentally mixed into the products (that is, whether only the cards of the non-defective cardstock are used in the products). Furthermore, even if a malicious fraudster illegally obtains the discarded cardstock 20, cuts it himself to create a counterfeit card, and brings the created counterfeit card into the game for use, it is possible to easily detect that it is a counterfeit card by reading the sheet ID31 from that card and checking the history on the database, and the security of the game can be enhanced.

[0076] Note that in the above-described embodiment, in the sheet ID imparting step, as shown in FIGS. 6 and 7, sheet IDs 31 and 32 are printed on the portions of the cards 21 to 23 of the cardstock 20 that are to be printed, but it is not limited to this, and the sheet ID may be printed on the portion of the cardstock 20 where the cards are not printed. In this case, it is possible to obtain the sheet ID from the remaining portion (so-called waste) after removing the cards 21 to 23 from the cardstock 20.

[0077] Also, in the above-described embodiment, in addition to (1) the cardstock 20 having the infrared ray transmission prevention layer 28 as an intermediate layer, (2) an ink containing no carbon is used for printing the suit 21a and the rank 21b, and (3) furthermore, the back pattern 29 on the back surface of the cardstock 20 was printed with an ink containing carbon, but (1) the cardstock 20 has the infrared In addition to having the infrared ray shielding layer 28, (2) when an ink containing no carbon is used for printing the suit 21a and the rank 21b, it is not always essential that (3) the back pattern 29 on the back surface of the card stock 20 is printed with an ink containing carbon, and the back pattern 29 may be printed with an ink containing no carbon.

[0078] Further, (1) in addition to the card stock 20 having the infrared ray shielding layer 28 as an intermediate layer, when (3) the back pattern 29 on the back surface of the card stock 20 is printed with an ink containing carbon, it is not always essential that (2) an ink containing no carbon is used for printing the suit 21a and the rank 21b, and an ink containing carbon may be used for printing the suit 21a and the rank 21b. Even in such a case, (1 ) since the card stock 20 is provided with the infrared ray shielding layer 28 containing carbon as an intermediate layer, infrared rays radiated from the front side of the card are absorbed by the intermediate layer 28 and do not transmit to the back side, and further, (3) since the back pattern 29 of the card is printed with an ink containing carbon, an infrared ray distribution similar to the back pattern 29 appears on the back side of the card. Therefore, even if there are infrared rays that are radiated from the front - side printed portions 21a, 21b and are not completely absorbed by the intermediate layer 28 and transmit to the back side, the transmitted minute infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern 29 of the card, and it is extremely difficult to discriminate the suit 21a and the rank 21b from such an infrared ray distribution. Therefore, even in such a manner, it is possible to provide a playing card in which the front - side printing is difficult to see through even when viewed through an infrared camera. ​​​​

[0079] Further, for the printing of the suit 21a and the rank 21b, ink that does not contain carbon is used. (3) Further, if the back pattern 29 on the back surface of the card stock 20 is printed with ink containing carbon, (1) it is not necessarily essential that the card stock 20 has the infrared ray shielding layer 28 as an intermediate layer, and the card stock 20 may not have the infrared ray shielding layer 28 as an intermediate layer. Even in such a case, (2) since ink that does not contain carbon is used for the printing of the suit 21a and the rank 21b, the difference between the intensity of infrared rays radiated from the printed portion and the intensity of infrared rays radiated from the surrounding area is small. Even if there is infrared ray that is radiated from the printed portion on the front side and transmits to the back side, it is difficult to distinguish the suit 21a and the rank 21b from the transmitted minute infrared ray distribution. Furthermore, since the back pattern 29 of the card is printed with ink containing carbon, an infrared ray distribution of the same pattern as the back pattern 29 appears on the back side of the card. Therefore, even if there is infrared ray that is radiated from the printed portion on the front side and transmits to the back side, the transmitted minute infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern 29 of the card, and it has become extremely difficult to distinguish the suit 21a and the rank 21b from such an infrared ray distribution. Therefore, even in such a manner, it is possible to provide a playing card in which the printing on the front side is difficult to see through when viewed through an infrared camera. used. Therefore, the difference between the intensity of infrared rays radiated from the printed portion and the intensity of infrared rays radiated from the surrounding area is small. Even if there is infrared ray that is radiated from the printed portion on the front side and transmits to the back side, it is difficult to distinguish the suit 21a and the rank 21b from the transmitted minute infrared ray distribution. Furthermore, since the back pattern 29 of the card is printed with ink containing carbon, an infrared ray distribution of the same pattern as the back pattern 29 appears on the back side of the card. Therefore, even if there is infrared ray that is radiated from the printed portion on the front side and transmits to the back side, the transmitted minute infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern 29 of the card, and it has become extremely difficult to distinguish the suit 21a and the rank 21b from such an infrared ray distribution. Therefore, even in such a manner, it is possible to provide a playing card in which the printing on the front side is difficult to see through when viewed through an infrared camera. Furthermore, since the back pattern 29 of the card is printed with ink containing carbon, an infrared ray distribution of the same pattern as the back pattern 29 appears on the back side of the card. Therefore, even if there is infrared ray that is radiated from the printed portion on the front side and transmits to the back side, the transmitted minute infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern 29 of the card, and it has become extremely difficult to distinguish the suit 21a and the rank 21b from such an infrared ray distribution. Therefore, even in such a manner, it is possible to provide a playing card in which the printing on the front side is difficult to see through when viewed through an infrared camera. Even if there is infrared ray that is radiated from the printed portion on the front side and transmits to the back side, the transmitted minute infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern 29 of the card, and it has become extremely difficult to distinguish the suit 21a and the rank 21b from such an infrared ray distribution. Therefore, even in such a manner, it is possible to provide a playing card in which the printing on the front side is difficult to see through when viewed through an infrared camera. Furthermore, since the back pattern 29 of the card is printed with ink containing carbon, an infrared ray distribution of the same pattern as the back pattern 29 appears on the back side of the card. Therefore, even if there is infrared ray that is radiated from the printed portion on the front side and transmits to the back side, the transmitted minute infrared ray distribution is overlapped and buried in the infrared ray distribution radiated from the back pattern 29 of the card, and it has become extremely difficult to distinguish the suit 21a and the rank 21b from such an infrared ray distribution. Therefore, even in such a manner, it is possible to provide a playing card in which the printing on the front side is difficult to see through when viewed through an infrared camera. Even when viewed through an infrared camera, it is possible to provide a playing card in which the printing on the front side is difficult to see through.

[0080] FIG. 11A is a diagram showing a cross section of a conventional playing card 111. In the conventional playing card 111, since visible light 103 and infrared rays 104 can transmit through, the rank can be seen from the back surface. There was a problem that printing 131 representing a club or a suit could be discriminated.

[0081] FIG. 11B is a diagram showing a cross-section of a playing card 112 obtained by adding an intermediate layer 128 to a conventional playing card 111. The playing card 112 includes an intermediate layer 128 having a black layer or a color layer similar to black, thereby preventing the transmission of visible light 103, and it is difficult to discriminate the printing 131 representing a rank or a suit from the back surface with visible light 103. However since infrared ray 104 has a strong ability to transmit and passes through the intermediate layer 128, there was a problem that the printing 131 representing a rank or a suit could still be discriminated from the back surface using the infrared ray 104 . . . .

[0082] FIG. 11C is a diagram showing a cross-section of a playing card 113 according to an embodiment. In the playing card 113 of this embodiment , an intermediate layer 128 having a black layer or a color layer similar to black is provided, and further, the printing 132 representing a rank or a suit is printed using ink that does not contain carbon. First the intermediate layer 128 having a black layer or a color layer similar to black prevents the transmission of visible light 103, and it is difficult to discriminate the printing 132 representing a rank or a suit from the back surface with visible light 103. Although the infrared ray 104 passes through the intermediate layer 128 by further printing the printing 132 representing a rank or a suit using ink that does not contain carbon, the infrared ray 104 passes through the printing 132 representing a rank or a suit, and it is also difficult to discriminate the printing 132 representing a rank or a suit from the back surface with the infrared ray 104 . . . . As described above, in the playing card 113 of this embodiment, it is difficult to discriminate the printing 132 representing a rank or a suit from the back surface with both the visible light 103 and the infrared ray 104. . .

[0083] FIG. 11D is a diagram showing a cross section of a playing card 114 according to another embodiment. In another embodiment of the present invention, the playing card 114 has a black layer or a layer of a color similar to black. The intermediate layer 129 is provided, and the print 132 indicating the rank or suit does not contain carbon. The ink is used for printing, and the intermediate layer 129 contains carbon. The intermediate layer 129 having a color similar to black prevents the transmission of visible light 103 and In addition, the amount of infrared light 104 transmitted is reduced by including carbon in the intermediate layer 128. The infrared rays 104 do not completely stop at the intermediate layer 129, but part of them penetrate the intermediate layer 129. In addition, the printing 132 showing the rank and suit is done with ink that does not contain carbon. By printing, infrared rays 104 penetrate the printing 132 indicating the rank and suit, Even with the outer line 104, it is difficult to distinguish the print 132 indicating the rank and suit from the back. As described above, in the playing card 114 of this embodiment, playing card 1 By reducing the amount of infrared light 104 that passes through the intermediate layer 129 compared to the amount of visible light 10 3 and infrared 104 can be used to distinguish the rank and suit of the card from the back side. It is becoming more difficult.

[0084] The above-described embodiment is merely an example of the present invention and is not intended to be limiting. The above embodiment has been described in order to enable the present invention to be implemented. It is obvious to those skilled in the art that the technical concept of the present invention can be applied to other embodiments. Therefore, the present invention is not limited to the described embodiments. It should be the broadest scope in accordance with the technical idea defined by the claims. The components of the above-described embodiments and individual modification examples can be arbitrarily combined without departing from the gist of the invention. ​

Claims

1. A gaming card used for a game, wherein a pattern representing the type of the gaming card is printed on one side of a card stock, and a back pattern common to a plurality of said gaming cards is printed on the back side, wherein the pattern is printed by using an ink substantially free of carbon, and the pattern printed with the ink substantially free of carbon allows infrared rays to pass through, so that it is difficult to determine the type of the gaming card from the back side with both visible light and infrared rays, a gaming card having such a configuration.

2. A gaming card according to Claim 1, wherein one or several sets of a deck are constituted by individual cards cut from the card stock by a cutting machine.

3. A gaming card according to Claim 2, wherein the back pattern is printed with an ink containing carbon, so as to substantially prevent the transmission of infrared rays from the back side by the ink containing carbon in the back pattern.

4. An intermediate layer that is difficult to transmit visible light and has a black layer or a color layer similar to black is provided on the card stock, substantially preventing the transmission of visible light from the back side by the intermediate layer, and the intermediate layer is substantially free of carbon, a gaming card according to any one of Claims 1 to 3.

5. A gaming card set constituted by a plurality of the gaming cards according to any one of Claims 1 to 4, wherein an ID code for identifying the gaming card set is assigned, a gaming card set. ​ ​ ​ ​ ​ ​

Images