SECURITY IMPROVEMENTS FOR FLEXIBLE SUBSTRATES
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United States of America Patent
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Issued Date -
Aug 8, 2013
app pub date -
Jun 24, 2011
filing date -
Jun 25, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of creating an optical security element in a value document using a low-cost printing device of a data processing terminal is described. The method comprises: providing a flexible substrate having a pre-printed ink portion; wherein the pre-printed ink portion is provided in an unexposed state which does not provide an optical security function of the security element; configuring a variable laser irradiation device to determine a part of the unexposed pre-printed ink portion to be exposed to laser radiation in a machine-controlled manner, and exposing the unexposed pre-printed ink portion to laser radiation in the machine-controlled manner to create from the pre-printed ink portion a predefined pattern, wherein the optical characteristics of the pattern provide the optical security element.
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