Incremental printing of symbolic information – Thermal marking apparatus or processes – Having driving circuitry for recording means
Reexamination Certificate
2005-06-23
2010-11-09
Tran, Huan H (Department: 2861)
Incremental printing of symbolic information
Thermal marking apparatus or processes
Having driving circuitry for recording means
Reexamination Certificate
active
07830405
ABSTRACT:
In one aspect of the invention there is disclosed a multicolor thermal imaging system wherein different heating elements on a thermal print head can print on different color-forming layers of a multicolor thermal imaging member in a single pass. The line-printing time is divided into portions, each of which is divided into a plurality of subintervals. All of the pulses within the portions have the same energy. In one embodiment, every pulse has the same amplitude and duration. Different colors are selected for printing during the different portions by varying the fraction of subintervals that contain pulses. This technique allows multiple colors to be printed using a thermal print head with a single strobe signal line. Pulsing patterns may be chosen to reduce the coincidence of pulses provided to multiple print head elements, thereby reducing the peak power requirements of the print head.
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Liu Chien
Vetterling Willilam T.
Ewing James F.
Foley & Lardner LLP
Morency Michel
Tran Huan H
Zink Imaging, Inc.
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