Security element in the form of threads or strips to be embedded

Details Security element in the form of threads or strips to be embedded Security element in the form of threads or strips to be embedded

1994-02-07

1996-04-23

Fridie, Jr., Willmon

Printed matter

Method

283 83, B42D 1500

Patent

active

055096913

ABSTRACT:
A security element that can be embedded in the form of a thread or strip in a security document, in particular a paper of value, is composed of two carrier sheets, each of which bears each of the marking substances allowing for detection of authenticity. The two carrier sheets are put together in such a way that the marking substances to be protected from mechanical abrasion and other external influences come to lie on the inside.
The thread not only offers special protection for the marking substances, but can also be embedded in the paper substance easily due to its symmetrical structure and without showing any tendency to curl.

REFERENCES:
patent: 4183989 (1980-01-01), Tooth
patent: 4204706 (1980-05-01), Blum et al.
patent: 4446173 (1984-05-01), Barrell et al.
patent: 4501960 (1985-02-01), Jouvet et al.
patent: 4522428 (1985-06-01), Small et al.
patent: 4587161 (1986-05-01), Barrell et al.
patent: 4756557 (1988-07-01), Kaule et al.
patent: 4763927 (1988-08-01), Schneider
patent: 5324079 (1994-06-01), Kaule et al.

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