Casino Token with Embedded RFID Chip

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Solution Overview

Problem

Existing casino tokens with contactless electronic identification devices face challenges in manufacturing complexity, cost, and security, particularly in achieving reduced thickness and multicolored edges, with previous methods requiring multiple plastic injections and offering inadequate protection against fraudulent access to the electronic circuit.

Innovation Solution

A token design that integrates the protective shell and edge of the contactless electronic identification device in a single injection of plastic material, allowing for reduced thickness and improved retention of the electronic insert, while facilitating RFID reading and preventing fraudulent replacement, using a core with peripheral annular projections and openings to secure the insert during injection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple plastic injections are used to manufacture tokens with electronic identification devices, then the protective structure and multicolored edges can be achieved, but the manufacturing complexity and cost increase

Engineering Contradiction:

Improveprotective structureVSAvoidmanufacturing process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the protective shell and edge structure into a single integrated component manufactured by one injection molding process. The insert is positioned within the mold cavity, and plastic material is injected to form both the protective enclosure and the edge in a single operation, eliminating the need for multiple separate injection steps while maintaining structural integrity and security.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If multiple plastic injections are used to manufacture tokens with electronic identification devices, then the protective structure can be achieved, but the manufacturing cost increases

Engineering Contradiction:

Improveprotective structureVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If traditional multi-injection methods are used, then protective structure can be achieved, but the token thickness cannot be reduced below 3.3 mm

Engineering Contradiction:

Improveprotective structureVSAvoidtoken thickness

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent repositions the electronic insert horizontally within the token body rather than stacking components vertically. The insert is placed in a horizontal plane within the single-thickness body, allowing the protective shell to enclose it from above and below without requiring multiple stacked layers, thus reducing the overall thickness below the conventional 3.3 mm limit.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

4Ease of manufacture

If electronic circuit is accessible by cutting face plate, then manufacturing is simpler, but security against fraudulent access is inadequate

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidfraudulent access

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent segments the token structure into an embedded insert containing the electronic circuit and a surrounding protective shell formed by injection molding. The insert is completely enclosed within the plastic body, with no removable face plates or access points, making the electronic circuit inaccessible without completely destroying the token structure.

Inventive Principle:

Principle #1Segmentation

5Adaptability or versatility

If separate production of central disc and annular crown is used, then manufacturing flexibility is improved, but the number of injections increases to three

Engineering Contradiction:

Improvemanufacturing flexibilityVSAvoidnumber of injections

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP1902409B1Silicon chip token and method for making same

Publication Date: 2011.08.10 GAMING PARTNERS INTERNATIONAL

Figure 1a~1b
Figure 2~3
Figure 4

AI summary

The invention concerns a generally disc-shaped token of the type obtained by multiple injection of plastic material comprising a core (14) obtained by a first injection of plastic material including a central portion (24) defining the central part of said token body and a peripheral portion (31) defining, through radial protrusions (18), at least partly the edge of the token body. The core (14) incorporates an insert (28), comprising a contact-free silicon chip identification device (27), embedded during the first injection in the central portion (24) and maintained at its periphery through protrusions or fingers integral with the injection mold and defining in the core openings (36). The token body comprises a covering web obtained by the second injection of plastic material performed around the peripheral portion (31) of the core (14) to produce with the core the entire edge and the peripheral annular part of the token body. A decorated tag is fixed on each side of the token. The token can be used as gambling chip or casino chip.