Printing system
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United States of America Patent
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Issued Date -
May 21, 2009
app pub date -
Apr 25, 2006
filing date -
Apr 25, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A substrate-marking system comprises a substrate-marking apparatus and a substrate which is susceptible, or includes an additive which is susceptible, to changing colour upon irradiation. The apparatus comprises a laser diode for emitting a beam of laser light and a galvanometer for aligning a desired point on the substrate with the laser beam such that the laser beam irradiates the desired point thus causing the additive, in use, to change colour at the point.
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