Security filament for use in identification cards

Details Security filament for use in identification cards Security filament for use in identification cards

1984-02-09

1986-10-21

Bell, Paul A.

Printed matter

Having revealable concealed information, fraud preventer or...

Identifier

283904, 283 77, 283 57, 428916, 428110, 428374, B42D 1500

Patent

active

046181679

ABSTRACT:
A filament for use with identification cards to render them tamper and fraud resistant having a meltable core of twisted polymeric micro-filaments which is wrapped with metal foil in a manner to leave portions of the core exposed.

REFERENCES:
patent: 2448782 (1948-09-01), Davis
patent: 2835993 (1958-05-01), Whitehead
patent: 3622429 (1971-11-01), Kippan
patent: 4097279 (1978-06-01), Whitehead
patent: 4183989 (1980-01-01), Tooth
patent: 4290630 (1981-09-01), Lee
patent: 4371196 (1983-02-01), Von Kempski et al.

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