Reading Chips One Zone at a Time Why the Collection Pad and the Payout Pad Must Not Listen at Once

This application is about two small patches of felt on a game table. One sits between the betting positions and the dealer’s chip tray and is where losing bets are placed on their way in. The other sits alongside it and is where winning payouts are placed on their way out. Each has an RFID antenna underneath it, and claim 1 requires that those two antennas do their reading at independent times, so that neither one picks up chips lying in the other’s zone. The applicant is Angel Group Co., Ltd. of Kyoto and the named inventor is Yasushi Shigeta. It is a divisional of Australian application 2024204038.

The Problem

Casino table games already run on a fairly well developed idea: build an RFID tag into every chip, put antennas under the betting spots and inside the dealer’s chip tray, and the house can read the bet and the float electronically instead of watching them. The specification sets that out as the background, and notes that if you combine those readings with something that knows the game result, such as a card shoe that reads the rank of each card as it is drawn in baccarat, you can check whether the amount that should have been collected was collected and the amount that should have been paid was paid, and so detect either a mistake or a fraud.

What that arrangement cannot see is the movement itself. A bet area antenna knows a stack was there and then was not. A chip tray antenna knows the tray went up by a certain amount. Neither can show what happened in between, or attribute a discrepancy to a particular hand, a particular player position, or a particular moment. The specification’s answer is to add two dedicated reading zones between the bet areas and the tray and require the chips to pass across them, so the collection and the payout are each read while the movement is happening.

Adding a second antenna a few centimetres from the first creates a new problem, and the specification is candid about it. Depending on the spacing between the zones and the strength of the electromagnetic waves the antennas emit, the collection antenna may read a chip sitting in the payout area, or the payout antenna may read a chip sitting in the collection area. Since the entire value of the arrangement is knowing which chips went which way, a reader that cannot tell the two zones apart is worse than no reader at all.

What This Invention Does

Claim 1 is a management system at a game table for a game played with RFID chips, where the table has a chip tray for the dealer’s chips, a bet area, and a collection area and a payout area that are different from both. The system comprises a collection reading means that reads, at the collection area, the tag of a chip collected because the bet lost, and a payout reading means that reads, at the payout area, the tag of a chip to be paid out to a player who won. The characterising requirement is the last line: the two reading means perform their reading at independent times.

Claim 2 is a second independent claim with the same preamble and a different answer to the same problem. Instead of two devices reading at separate times, the collection reading device and the payout reading device are the same device. Claim 3 then has that single device use the collection antenna and the payout antenna alternately, so the two zones are read in turn rather than together. Claim 4 adds a jamming antenna in either or both zones, which the description explains as blocking or deforming the electromagnetic waves arriving from the other zone’s antenna. Claim 18 is the crudest version of the same fix: put the two areas far enough apart that neither reader reaches the other.

Anyone reading the title page should note that the abstract does not describe claim 1. The abstract recites a system with four reading means, including a chip tray reading means and a bet area reading means, and says nothing about independent timing. That is the parent’s claim. In this divisional the chip tray reader and the bet area reader have been dropped from the independent claims entirely, and the inventive point has moved to keeping the two dealer-side zones from interfering with each other. Where the title and abstract disagree with the claims, the claims are what would be enforced.

The remaining dependent claims describe the checking the two zones make possible. Claim 6 adds a collection judging means that decides whether the chips that should have been collected from the bet area actually crossed the collection pad and were read. Claim 7 builds the full loop: the tag also carries the chip’s value, a bet judging means at the table works out the bet target and bet amount, a game result judging means works out who won, and the collection judging means compares the amount read at the collection pad against the amount those two calculations say should be collected. Claim 8 does that bet by bet, claim 9 does it as a total across all losing bets in the round, and claims 10 and 11 mirror both for payouts.

Claims 12 to 17 cover a different transaction entirely, and it is the most interesting part of the claim set. When a player wants to swap chips for different denominations, the player puts their chips in one zone and the dealer puts the equivalent chips in the other. Because both pads have chips on them at the same time, the system can recognise that this is an exchange rather than a collection or a payout, and switch into an exchange mode. Claim 13 makes simultaneity the trigger. Claim 14 then checks that the total value read on one pad equals the total value read on the other. Claim 15 adds an ownership check: the chips on one side should belong to a player and the chips on the other should belong to the casino. Claims 16 and 17 attach an alert device to both failures, and the description spells out the case it is really looking for, where both sets of chips are owned by the casino or both are owned by a player, meaning the exchange is not between the player and the house at all.

The worked embodiment gives the arrangement concrete shape. The table has five betting positions, and within each a player can back the player, the banker, a tie, a player pair or a banker pair. Two cameras look down at the felt from different angles and an image recognition device using a neural network identifies the position, type and number of chips in each betting spot, which is how the bet target and bet amount are judged. An electronic card shoe reads the rank of each card as it is dealt and applies the rules of baccarat to determine the result. The collection and payout antennas plus the chip tray antenna are wired to a single reading device that controls them by time sharing, which is exactly the mechanism claims 2 and 3 recite, and the specification offers the alternative of separate readers firing at independent timings, which is claim 1.

The reconciliation described in the body goes several layers deep. The management device knows, before the dealer touches anything, which stacks must be collected and how much must be paid to each winning position. Because the dealer pays out in player position order, the total that should cross the payout pad is known in advance, and when the amount actually read differs the system identifies and records the specific player position involved. After all collections are complete it compares the increase in the chip tray against the total read at the collection pad. After all payouts are complete it does the same for the decrease. It can also check that chips which disappeared from a bet area antenna are the same chips that appeared at the collection pad, matched by individual chip ID rather than just by value.

Key Features

• Two dedicated dealer side zones. The collection area and payout area are separate from both the bet areas and the chip tray, and sit between them, so that every collected or paid chip is read while it is moving rather than inferred from a before and after count.
• Independent reading times as the claimed fix. Claim 1 turns on the two readers operating at independent times, which is a timing solution to a physical crosstalk problem rather than a change to the antennas themselves.
• One reader, two antennas, alternating. The separate independent claim 2 and its claim 3 cover the single device case, where the same reading device drives the collection and payout antennas alternately.
• Jamming antennas and shielding. Claim 4 adds a jamming antenna to block or deform the waves arriving from the neighbouring zone, and the description offers shielding material and simple physical separation as alternatives to the same end.
• Exchange detection by simultaneity. When both pads hold chips at once, the system infers a denomination exchange, then checks that the two totals are equal and that one side belongs to a player and the other to the casino.
• Per position attribution of discrepancies. Because payouts cross the pad in player position order, a shortfall can be tied to a specific seat rather than to the round as a whole.

Who Is Behind It

Angel Group Co., Ltd. is the Kyoto company behind the Angel Playing Cards brand, and it describes itself as a manufacturer with a high market share in casino playing cards and casino currencies, with group operations spanning Japan, Singapore, Macau, Australia, the Philippines, the United States, France and Mexico. Its product lines run from cards and chips through RFID reading systems to AI and optical recognition systems, which is why a specification like this one can assume tagged chips, table antennas, ceiling cameras and an electronic shoe all exist and simply describe how to wire them together.

Yasushi Shigeta, the group’s chairman, is the sole named inventor here as he is on most of the group’s filings. The Australian portfolio around this one is substantial and heavily divisional, which is why several related applications appear in the same journal issues.

On priority the specification itself says nothing. There is no cross reference paragraph, no convention claim and no mention of any earlier application anywhere in the body; the only relationship the document establishes is the title page entry recording it as a divisional of Australian application 2024204038. From the published family record rather than from this specification, AU 2024204038 is itself a divisional of AU 2023200512, filed 31 January 2023, which claims priority from Japanese application 2022-014290 filed 1 February 2022. That makes the priority country Japan, but readers should know that chain comes from the family data and not from anything printed in this document.

A second Angel divisional, AU 2026202195, was filed on the same day and published in the same journal. It is genuinely a different invention rather than a restatement of this one: it claims the cage, the secure back office where chips are issued and redeemed, and its readers sit at internal doorways rather than on the felt. There is a small overlap at the boundary, since claim 8 of that application adds a single reader at a game table, but the two specifications have different problems, different embodiments and different drawings.

Why It Matters

Table games are the part of a casino that automation has had the most trouble reaching. Slot machines account for every cent internally. A table game is a human transaction conducted in public at speed, and the traditional controls are a pit boss, a ceiling camera and a drop box. Chip level RFID promises an audit trail for that transaction, but only if the readings can actually be attributed. A read that cannot distinguish a chip being taken from a chip being given is not evidence of anything.

That is why a claim about reading timing is less trivial than it looks. The value of the whole arrangement rests on the direction of travel, and direction is exactly what a pair of overlapping antennas destroys. The specification’s own list of remedies, stagger the timing, share one reader, add a jamming antenna, add shielding, or just move the pads apart, reads like a summary of what an engineering team tried on a real table before deciding which version to claim.

There is also a pointed operational target buried in the exchange claims. Checking that one side of a chip swap belongs to a player and the other to the casino is not a measurement problem, it is a collusion check. The scenario the alert is written for, where both sets of chips turn out to have the same owner, is a dealer and a player moving value across the table under cover of a routine denomination change. Whether a regulator would accept an automated alert as sufficient control, or whether the system’s own judgement of who owns a chip is reliable enough to accuse anyone, is not something the specification addresses.

Related Concepts

• Time-division multiplexing – the general technique behind reading two adjacent zones in alternating slots through one device.
• Electromagnetic interference – the crosstalk between neighbouring antennas that the independent timing, jamming and spacing measures all address.
• Electromagnetic shielding – the alternative physical remedy the description offers instead of a jamming antenna.
• Computer vision – how the embodiment judges the bet target and bet amount, using two cameras and a neural network over the betting spots.
• Dealing shoe – the card dispenser which, in electronic form, reads each card’s rank and supplies the game result the reconciliation depends on.

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AU 2026202201 was published in the Australian Official Journal of Patents on 9 April 2026 and is open for public inspection. Patent applications represent inventions that are sought to be protected and do not necessarily reflect commercially available products.