Printed matter – Having revealable concealed information – fraud preventer or... – And electrically conductive material
Patent
1988-11-14
1990-07-24
Watts, Douglas D.
Printed matter
Having revealable concealed information, fraud preventer or...
And electrically conductive material
283 70, 283 91, 283901, B42D 1500, G09F 1900, G09F 1912, G09F 1914
Patent
active
049430939
ABSTRACT:
Security papers according to the invention comprise opposed surfaces for the provision of printing to identify a document formed from the paper, and positioned at least partially between the two surfaces of the paper as a public security feature a security device of not more than 5 mm width, which device comprises a flexible, water-impermeable substrate with a layer of metal on one or both sides of the substrate, there being present on one side of the device a continuous metal path along its length, wherein said device has metal-free portions of between 10% and 50% of the area of the device, said metal-free portions along the length of the device providing a repeating pattern, design, indicia or the like with at least some of the metal-free portions across the tranverse direction of the device being wholly surrounded by metal. The metal-free portions may provide characters of a language, such as letters of the English alphabet. The security device may be a strip or thread and this may be positioned in a window, or in an aperture where two windows are impartial or complete register.
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Knight Malcolm R. M.
Melling Raymond J.
Heyrana Paul M.
Portals Limited
Watts Douglas D.
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