Printed matter – Having revealable concealed information – fraud preventer or... – Utilizing superposed layers
Patent
1984-04-12
1985-04-30
Bell, Paul A.
Printed matter
Having revealable concealed information, fraud preventer or...
Utilizing superposed layers
101194, 283 58, 283902, 283904, B42D 1500, G03B 2702
Patent
active
045139920
ABSTRACT:
A data carrier, in particular check paper, having a picture theme printed on by the dot screen, grain screen, line-halftone combination or special screen techniques or as a line copy, which is printed over by a security pattern serving the purpose of protecting the data carrier. The picture theme is interrupted by a negative security pattern adapted to the security pattern, into which negative security pattern the security pattern is printed congruently. The lines of the negative security pattern are preferably wider than the lines of the security pattern, so that the lines of the security pattern integrated into the picture theme are at a certain distance from the lines of the negative security pattern in the entire picture area and do not touch the picture theme.
REFERENCES:
patent: 2984030 (1961-05-01), Hannon
patent: 3533176 (1970-10-01), Weitzberg et al.
patent: 3610120 (1971-10-01), Morse et al.
patent: 3807852 (1974-04-01), Hoydil
patent: 3827726 (1974-08-01), McJoy et al.
patent: 4066280 (1978-01-01), Lagapria
patent: 4360548 (1982-11-01), Skees et al.
May Stefan
Muller Hans
Bell Paul A.
Gao Gesellschaft fur Automation and Organisation mbH
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