| 摘要 |
A card handling apparatus includes a reader/writer incorporated in a vending machine, and the reader/writer reads the encoded data representative of a present value, which is written in a first recording portion of a prepaid card, in accordance with decoding data recorded in a second recording portion of the card. Thereafter, the inspection data representative of a residual value of "0" is encoded in accordance with another encoding method and written in the first recording portion of the card for recording the value data after a payment for a price of a sold item. The inspection data as written is read again to be compared with the inspection data intended to be written. If the both are not coincident with each other, a failure or abnormality develops in a writing function, and therefore, an operation of the reader/writer is stopped. If the both are coincident with each other, no abnormality develops in a reading/writing function. In this case, the residual value data sent from the vending machine is encoded in accordance with a still further encoding method and written in the first recording portion, and the decoding data by which the data encoded in accordance with the still further encoding method can be decoded is written in the second recording portion.
|
