Security document

Details Security document Security document

1985-06-07

1988-08-16

Kazenske, E. R.

Printed matter

Method

Identifying

283 74, 283 83, 428212, G09C 300, G09C 500, B42D 1500, B05D 700

Patent

active

047639270

ABSTRACT:
In order to increase the protection against forgery of a security paper, a security inlay made of polymer material having piezoelectric and/or pyroelectric properties is embedded in the security paper. The presence of such an inlay can be tested by means of contacting and non-contacting measuring methods.

REFERENCES:
patent: 3571957 (1971-03-01), Cumming
patent: 4223918 (1980-09-01), Smoczynski
patent: 4226904 (1980-10-01), Ollivier et al.
patent: 4230344 (1980-10-01), Bell, Jr. et al.
patent: 4290630 (1981-09-01), Lee
patent: 4379471 (1983-04-01), Smith et al.
patent: 4434549 (1984-03-01), Smith et al.
patent: 4455039 (1984-06-01), Weitzen et al.
patent: 4522428 (1985-06-01), Small et al.
patent: 4544836 (1985-10-01), Galvin et al.
patent: 4609207 (1986-09-01), Muck et al.

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