Tamper resistant security film

Details Tamper resistant security film Tamper resistant security film

1984-09-14

1986-12-23

Corbin, John K.

Printed matter

Maps

283 94, G02B 5128

Patent

active

046308911

ABSTRACT:
Security film comprising a monolayer of transparent microspheres supported in a thin layer of binder material, a pressure-sensitive adhesive layer coated on the layer of binder material, and disposed between the pressure-sensitive adhesive and binder layers, at least one patterned layer that has differential adhesion to the pressure-sensitive adhesive layer and the binder layer such that upon attempted elevated-temperature removal of the film from a substrate the film splits, with part of the film remaining on the substrate and part being removed.

REFERENCES:
patent: 1003443 (1911-09-01), Erickson
patent: 3631617 (1972-01-01), Pekko
patent: 4023889 (1977-05-01), Eagon et al.
patent: 4070774 (1978-01-01), Staats et al.
patent: 4082873 (1978-04-01), Williams
patent: 4101701 (1978-07-01), Gordon
patent: 4180929 (1980-01-01), Schultz, Jr.
patent: 4429015 (1984-01-01), Sheptak

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