Labeling methods and apparatus using electromagnetic radiation
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United States of America Patent
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Sep 11, 2007
Grant Date -
May 4, 2006
app pub date -
Oct 29, 2004
filing date -
Oct 29, 2004
priority date (Note) -
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Abstract
A method and apparatus are provided for visually marking a recording medium by inducing a phase change in a light-sensitive surface by heat absorption from laser radiation. The method includes applying the laser radiation to a desired portion of the light-sensitive surface according to a first power profile for a first period sufficient to substantially obtain a color change at the desired portion, and applying the laser radiation to the desired portion of the light-sensitive surface according to a second power profile for a second period sufficient to complete the color change at the desired portion.
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