Card

Abstract

Abstract PURPOSE: To prevent a card from being used dishonestly, even by forgery and falsification, by recording information which can be perceived by persons and also can be read mechanically, and disposing not only reading this information but also writing the result of use. CONSTITUTION: In card 1, strip-form colored layer 1b is caused to adhere to a part of substrate 1a, and opaque thermosensitive layer 1c is caused to adhere onto layer 1b. Information write part 1d is constituted with these layers 1b and 1c. Numbers 1W24 indicating a maxium of use frequency, for example, 24 are printed adjacently to write part 1d. This card 1 is subjected to exposure and heating processings each time it is used, and layer 1c of the used section is changed from the white opaque state to the transparent state, and the color of lower layer 1b appears. As a result, even if information of write part 1d is forged or falsified, the card cannot be used dishonestly. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Toshio Miyashita

Bibliographic Details