Magnetic metallic safeguarding thread with negative writing and a method of making same
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United States of America Patent
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Feb 4, 1997
Issued Date -
N/A
app pub date -
Aug 2, 1994
filing date -
Dec 20, 1990
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a security document, in particular a bank note, identity card or the like, having a security element which is provided with characters, patterns, etc., visually readable at least in transmitted light and which is electrically conductive and bears additional substances for machine testing, and to a method for producing such a security element. The security element preferably consists of a transparent film strip that bears negative writing readily capable of visual checking and is additionally provided with electrically conductive and magnetic substances.
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