Safeguard against falsification of securities and the like which

Details Safeguard against falsification of securities and the like which Safeguard against falsification of securities and the like which

1978-06-09

1979-06-12

Kilgore, Robert M.

Registers

Records

Fluorescent, phosphorescent, radiation emitting

40 22, 283 7, 235488, 235494, G06K 1906, G09F 302, G06K 1902, B42D 1500

Patent

active

041577841

ABSTRACT:
The valuable papers, such as the securities and the like, have safeguard elements against forgery or falsification and which can be mechanically examined using light of the visible, ultraviolet or infrared spectral regions and which are effective, particularly, against erasure. The paper is provided with a homogeneous protective coating which is applied either prior to or following the application of an information print by an ink impression. The paper, the protective coating and the printing ink have respective reflectance or fluoroescence properties such that, any damage to the protective coating, such as an attempted erasure, is detectable either at the wavelength of light serving to read the information print or at a special test wavelength.

REFERENCES:
patent: 3279826 (1966-10-01), Rudershausen
patent: 3412493 (1967-10-01), French
patent: 3455577 (1969-07-01), Kikumoto
patent: 3536894 (1970-10-01), Travioli
patent: 3594933 (1971-07-01), Cooper
patent: 3786237 (1974-01-01), Postal

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