Security seal

Details Security seal Security seal

1981-11-17

1985-03-26

Bell, Paul A.

Printed matter

Method

Identifying

283 74, 283 78, 283 85, B42D 1500

Patent

active

045069140

ABSTRACT:
Security for a package or verifying seal in plastic material is provided by a print seal with unique thermally produced imprints in the plastic. If tampering is attempted, the material is irreparably damaged and thus detectable. The pattern of the imprints, similar to "fingerprints" are recorded as a positive identification for the seal, and corresponding recordings made to allow comparison. The integrity of the seal is proved by the comparison of imprint identification records made by laser beam projection.

REFERENCES:
patent: 3511571 (1966-05-01), Ogle
patent: 3597045 (1971-08-01), Mathisen
patent: 3604806 (1971-09-01), Redman
patent: 3814904 (1974-06-01), Russell et al.
patent: 3894756 (1975-07-01), Ward
patent: 3917402 (1975-11-01), Ohta
patent: 3933304 (1976-01-01), Judd
patent: 4171864 (1979-10-01), Jung et al.
patent: 4227805 (1980-10-01), Schiller
patent: 4269473 (1981-05-01), Flothmann et al.
patent: 4386795 (1983-06-01), Charles et al.
Schuenzel, E. C. and Moore, R. L., IBM Technical Disclosure Bulletin, vol. 13, No. 1, p. 176, Jun. 1970.

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