| 摘要 |
A security seal having a plastic body including three elongated parallel chambers. Mating with the body is a U-shaped resilient shackle having a pair of legs each having a reversely bent end portion terminating in a sharp edge for insertion in two of the chambers. The third chamber in the body contains a frangible ampule containing a colorless liquid. A solid substance that combines with the liquid to create a third substance with a bright hue is stored in the third chamber and/or is coated on selected portions of the seal. When used to seal a structure, the shackle is threaded through the structure, and the legs are inserted into the chambers. The sharp edges of the reversely bent end portions are flexed into tight engagement with the interior walls of the chambers. In this locked position, any tampering with the security seal that would cause the shackle to move in a direction opposite to the direction in which the shackle was inserted in the body would result in the sharp edges of the reversely bent end portions penetrating the walls of the chamber, entering the third chamber, shattering the ampule, and ejecting the liquid. The ejected liquid will combine with the solid substance to form the third, brightly colored, substance to indicate tampering.
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