Photocopying – Contact printing – Methods
Patent
1981-10-02
1984-07-10
Bell, Paul A.
Photocopying
Contact printing
Methods
355 79, 355133, 101194, 101211, 283 57, 283 58, 283 59, 283 94, 283113, 283902, G03B 2702, G09F 302
Patent
active
044590202
ABSTRACT:
A data carrier, in particular check paper, having a picture theme printed on by the dot screen, grain screen, line-half-tone 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), Hoydic
patent: 3827726 (1974-08-01), McVoy et al.
patent: 4066280 (1978-01-01), Lacapria
patent: 4360548 (1982-11-01), Skees et al.
May Stefan
Muller Hans
Bell Paul A.
GAO Gesellschaft fur Automation und Organisation mbH
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