Optically variable surface pattern
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United States of America Patent
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-
Dec 13, 2005
Grant Date -
Mar 31, 2005
app pub date -
Jun 5, 2002
filing date -
Jun 20, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An optically variable surface pattern (1) contains relief structures (9.1; 9.2; 9.3) for producing at least two representations (2; 3; 4). The relief structures (9.1; 9.2; 9.3) have a period length (L) of at least five micrometers and are sawtooth-shaped. The relief structures (9.1; 9.2; 9.3) associated with different representations (2; 3; 4) have different angles of inclination (α;β;γ). The angles of inclination are so selected that the representations (2; 3; 4) can be perceived separately by a viewer on the one hand and on the other hand when producing a copy by means of a color photocopier they are all transferred onto the copy.
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Cited Art Landscape
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