Printed matter – Having revealable concealed information – fraud preventer or... – Having watermark
Patent
1989-12-19
1993-02-23
Bell, Paul A.
Printed matter
Having revealable concealed information, fraud preventer or...
Having watermark
283107, 283110, 283904, B42D 1500
Patent
active
051883953
ABSTRACT:
The present invention provides a waterproof recording material having ground patterns characterized in that the ground patterns are imparted to the surface of a film of a resin composition comprising a thermoplastic synthetic resin and a filler. According to this invention, it is possible to provide a fine-looking recording material which, besides excellent waterproofness and recording property, may have various stages of surface properties and visual effects imparted by means of the ground patterns. The waterproof recording material having ground patterns of the present invention is suitable as a material of valuable securities and the like, facilitating true/false discrimination and preventing illegal use or abuse thereof by altering, falsification et cetera.
REFERENCES:
patent: 4307899 (1981-12-01), Hoppe
patent: 4451068 (1984-05-01), Hall et al.
patent: 4456639 (1984-06-01), Drower et al.
patent: 4469725 (1984-09-01), Fischer et al.
patent: 4506916 (1985-03-01), Kuhl
patent: 4856857 (1989-08-01), Takeuchi et al.
Modern Plastics Encyclopedia, 1980-1981, pp. 454-455.
Pulp and Pater Chemistry and Chemical Technology, Third Edition, vol. IV, Wiley & Sons, 1983, pp. 2516-2519.
Kawahara Hiroshi
Kobayashi Mitsuru
Ohara Shuzo
Okunaka Noriaki
Tokuno Isao
Bell Paul A.
GOYO Paper Working Co., Ltd.
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