| 摘要 |
PURPOSE: To prevent forgery or paper money, credit or tickets on a paper support or documents from occurring and to safely perform discrimination by using at least one or more concentric geometrical figure, especially circle consisting of steel or other magnet-responsive materials. CONSTITUTION: At least two concetric circles A and A' consisting of steel or other magnetic materials detectable by a magnet are included on one or more position of bank notes or documents, e.g. at left and right central regions in a paper. In addition, instead of aluminum fibers provided on various bank notes at present time, continuous or discontinuous bands (B and C) with appropriate width and thickness suitable for kind and size of documents to be prepd. may be applied along the bank note or the document as far as they are made of magnet-responsive materials. In addition, to probe reality of the bank notes or other documents, it is performed by means of a programmed electronic instrument by moving a magnet or a rod with a magnet on one end of the rod or along a certain length to facilitate operation to the neighborhood of the circles A and A'. |
