| 摘要 |
PURPOSE:To compare information recorded on a magnetic film with a record on a main magnetic film and make forgery of a card difficult by providing a magnetic film for recording auxiliary information by a magnetic material having coersive force of >=2,500e. CONSTITUTION:A magnetic film 2 for normal record reproducing is provided on one side of the base plate of a magnetic card 1, and plural small circular magnetic films 3 are formed on the opposite side corresponding to figures added to show the number of times of use. Coersive force of the magnetic material of this magnetic film 3 is made >=2,500e. The magnetic film 3 is made to a strip type magnetic film 3', and information indicating the number of times of use and sum of money or corresponding information is recorded on the magnetic film 3 or 3' in the same form with the magnetic film 2. The contents of information recorded on the magnetic films 2, 3 are compared to make forgery of a magnetic card difficult. |
