| 摘要 |
PURPOSE:To prevent to copy, forge and alter a card by shifting a magnetic head at a right angle in the transport direction of the recording media, executing the writing and forming a special data track on the recording media. CONSTITUTION:A magnetic head 4 is fixed to a sliding block 5, and a block 5 is installed in a reciprocating manner in the (c) direction of an arrow at a right angle in the transport direction of the recording media by a spiral gear 7 interlocking with a step motor 6. Presently, when magnetic recording media P are transported in the (a) direction of an arrow by rollers 1 and 2, the motor 6 is driven through a timing disk 10 of a platen roller 3 and a head 4 is shifted in the (c) direction. Consequently, an inclination-shaped special data track 13 is recorded on the media P. For this reason, when the exclusive-use reading device is used, the reading and writing can be executed, when the copying is executed, the asymmetry is obtained and the forging and altering can be prevented. |
