Incremental printing of symbolic information – Light or beam marking apparatus or processes
Reexamination Certificate
2007-09-11
2007-09-11
Pham, Hai (Department: 2861)
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Reexamination Certificate
active
10976445
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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Colburn Kevin L.
Gore Makarand P.
Hanks D. Mitchel
Taugher Lawrence N.
Hewlett--Packard Development Company, L.P.
Pham Hai
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