| 摘要 |
<p>PURPOSE:To prevent the fogery of data due to through-holes by providing a plurality of magnetic recording pieces in predetermined arrangement in parallel to a data recording region to the surface of a substrate and setting a part of the magnetic recording pieces to a through-hole perforating part opening the through-hole at the use time of a magnetic card. CONSTITUTION:Magnetic recording pieces 32 are parallelly arranged to the data recording region 31 on the magnetic layer 3 provided to a substrate 2 at a predetermined interval in two rows and, since only the predetermined magnetic recording pieces 32 are magnetized corresponding to the data recorded on the data recording region 31 such as residual frequency data, the residual frequency data can be displayed by the patterns due to the magnetic recording pieces 32. The magnetic recording pieces 32 are through-hole perforating parts providing through-holes at the use time of a magnetic card 1 and the through-holes 5 are opened to the predetermined magnetic recording pieces 32 corresponding to the data of the recording region 31. Therefore, the residual frequency data can be also displayed by the through-holes 5. When the magnetic card 1 is used, the data of the data recording region 31 is rewritten and the data due to the magnetic recording pieces 32 is rewritten and new through-holes 5 are opened and, therefore, when these data are collated, the forgery of data and the presence of alteration can be checked.</p> |
