| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a security thread detecting device for identifying the code of a coded security thread provided in a paper sheet without providing any sensor or the like. <P>SOLUTION: When a coded security threshold 12 is to be detected by linearly arranging a plurality of minimum unit magnetic chips 13 rolled in a direction orthogonal to the conveyance direction of a paper sheet P, a magnetic sensor 16 is arranged so as to be inclined in a predetermined angle introduced from the diagonal angle of the minimum unit magnetic chip 13 to a direction orthogonal to the conveyance direction of the paper sheet P. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
