| 摘要 |
PURPOSE: A forging preventing stamp is provided to enable the inner corners of encoded symbols formed along the outer circumferential surface of a stamp to form a given angle. CONSTITUTION: A forging preventing stamp(10) comprises a body, a sign surface(10a), and encoded symbols(12). The body has a ring shape. The encoded symbols are formed along the outer circumferential surface(11) of the sign surface. The encoded symbols are formed so that inner corners form a given angle(13). The angle is created when the encoded symbols are processed by a precision instrument on the outer circumferential surface of the stamp. The encoded symbols are encoded by the pattern, color and size of symbol and are difficult to recognize with naked eyes.
|
