| 摘要 |
PURPOSE:To inhibit a card from being re-utilized for an illegal purpose by piercing a punch hole on the magnetic data of a magnetic card corresponding to the used amount of money and destroying magnetic information. CONSTITUTION:When the magnetic card 1 is processed in a card processor, the punch hole is pierced in the card 1 by a punch 4 when the card 1 is used for the first time and the punch hole of a balance amount display punch 5 is pierced by the used amount of money in the card 1. The balance amount display punch 5 is pierced on a track where the data of balance amount display 8 are recorded as the magnetic information. Finally, when the total amount of money is used up, the punch hole of a card used punch 6 is pierced. The first track 3 can not be rewritten in the card processor. In the card processor, when the card is processed, a card issuance face value money amount 2 is read by a sensor, whether or not illegality is present in the upper limit money amount of the card 1 is judged by comparing the card money amount information of the first track 3 with the balance amount data of a second track 7. |
