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U.S. Department of Energy
Office of Scientific and Technical Information

Security seal

Patent ·
OSTI ID:865382
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.
Research Organization:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
DOE Contract Number:
AT(29-1)-789
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 4506914
OSTI ID:
865382
Country of Publication:
United States
Language:
English