Objects to be checked for authenticity, and method and apparatus for checking whether or not objects are authentic
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 11, 1997
Grant Date -
N/A
app pub date -
May 16, 1994
filing date -
May 19, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An object to be checked contains a large number of magnetic polymer elements scattered at random. Each of magnetic polymer elements is made up of an element main body formed of a high molecular material, and magnetic metal powder contained in the element main body. The magnetic polymer elements are integrally incorporated in paper and tangled with the wood pulp fibers of the paper three-dimensionally. In the manufacturing process of the object, a processing apparatus magnetically scans the magnetic polymer elements incorporated in the scanning region of the object while moving the scanning region at a predetermined speed, converts a detection signal obtained by the magnetic scan into a cipher code, and records the cipher code in a code indicator section. In the authenticity checking process, the processing apparatus magnetically scans the magnetic polymer elements once again, and a detection signal obtained thereby is collated with the cipher code recorded in the code indicator section. When the detection signal and the cipher code agree with each other, the object is determined as being authentic.
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