| 摘要 |
PURPOSE:To prevent improper use due to forgery, by forming desired information with a magnetic substance to a prescribed location of a card main body with a bar code, imbedding a nonmagnetic substance between the bars to arrange the height, and to coat the card with over sheet and allowing an erase to be kept impossible. CONSTITUTION:A base main body 1 is formed with white opaque hard polyvinyl- chloride, and a desired magnetic substance is coated in the form of bar code 2 on the base so as to form desired information codes. Nonmagnetic substance is imbedded between the clearance of the bar codes 2, the height is arranged and an over sheet 3 is coated. A picture pattern is printed on the over sheet 3 so as to make visual observation of the bar code impossible. Thus, the erase and forgery of information is made impossible, allowing to prevent improper use. The effect of forgery prevention can further be improved, by demagnetizing the bar code 2, magnetizing the code at each reading and demagnetizing the code again after reading. |
