Security paper with authenticity features in the form of substan

Details Security paper with authenticity features in the form of substan Security paper with authenticity features in the form of substan

1984-03-07

1986-07-01

Howell, Janice A.

Radiant energy

Luminophor irradiation

2504611, 283 87, F21V 916, G01N 2164

Patent

active

045982058

ABSTRACT:
Security paper with luminescing authenticity characteristics which after excitation with invisible light emit exclusively invisible light of different wavelengths as authenticity signal. The luminophores can be included in the printing ink used or they can be added to the paper material in the manufacture of the paper material. A corresponding test apparatus makes it possible to check the authenticity of the security paper in the presence of customers but unnoticed by them; thereby the invisibility of the test signal and the authenticity signal are taken advantage of and the test device is hidden behind a plate non-transmissive for visible light which however is transmissive for the test signal and for the authenticity signal.

REFERENCES:
patent: 2704634 (1955-03-01), Rauch
patent: 3208009 (1965-09-01), Etzel et al.
patent: 3412245 (1968-11-01), Halverson
patent: 3447851 (1969-06-01), Remeika et al.
patent: 3455577 (1969-07-01), Kikumoto et al.
patent: 3473027 (1969-10-01), Freeman et al.
patent: 3480877 (1969-11-01), Dillon et al.
patent: 3525698 (1970-08-01), Leto et al.
patent: 3533176 (1970-11-01), Weitzbert et al.
patent: 3654463 (1972-04-01), Geusic
patent: 3663813 (1972-05-01), Shaw
patent: 3928226 (1975-12-01), McDonough et al.
patent: 4015131 (1977-03-01), McDonough et al.
patent: 4047033 (1977-09-01), Malmberg et al.
patent: 4056731 (1977-11-01), Bayha
patent: 4066280 (1978-01-01), LaCapria
patent: 4122349 (1978-10-01), Fouassier et al.
patent: 4128674 (1978-12-01), Hedler
patent: 4146792 (1979-03-01), Stenzel
patent: 4152483 (1979-05-01), Kanda et al.
patent: 4202491 (1980-05-01), Suzuki
patent: 4215289 (1980-07-01), DeHair et al.
patent: 4222662 (1980-09-01), Kruegle
patent: 4246128 (1981-01-01), Gallagher et al.
Dieke, "Spectra & Energy Levels of Rare Earth Ions in Crystals"; Interscience, N.Y. 1968, Chapt. 13, p. 189 ff.
Auzel, Francois, "Materials and Devices Using Double-Pumped Phorphors with Energy Transfer", Proceedings of the IEEE, vol. 61, 6 (1973), p. 769.
Miyazoe, Yasushi et al, "Stimulated Emission from 19 Polymethine Dyes-Laser Action Over the Continuous Range 710-1060 m.mu.", Applied Physics Letter, vol. 12, 1968, p. 206ff.
Fant, W. J. et al, "Infrared Transparent Credit Card", IBM Technical Disclosure Bulletin, vol. 9, No. 7, 1966.

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