Trading cards and method of concealing and revealing information

Details Trading cards and method of concealing and revealing information Trading cards and method of concealing and revealing information

1991-04-15

1994-02-01

Bell, Paul A.

Printed matter

Miscellaneous

40427, 40446, 283 72, 283 95, 283 97, 283901, 434365, B42D 1500

Patent

active

052826511

ABSTRACT:
Trading cards are made interactive with the user by concealing under a coating the secondary indicia portion of an image comprising both primary and secondary indicia, and selectively altering the coating to reveal the secondary indicia in the presence of the primary indicia to complete the image. A thermochromic coating material responsive to temperature change from ambient temperature, as by rubbing the coating with the fingers, enables the local exposure of the secondary indicia.

REFERENCES:
patent: 736035 (1903-08-01), Stevenson
patent: 3268238 (1966-08-01), Finkel
patent: 4163570 (1979-08-01), Greenaway
patent: 4725462 (1988-02-01), Kimura
patent: 4973087 (1990-11-01), Balogh
patent: 5083815 (1992-01-01), Scrymgeour et al.

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