Electrophotography – Diagnostics – Fixing
Reexamination Certificate
2011-08-09
2011-08-09
Gray, David M (Department: 2852)
Electrophotography
Diagnostics
Fixing
C399S031000, C356S417000
Reexamination Certificate
active
07995936
ABSTRACT:
Optical measurement system and method for determining a wear level of printer components such as fuser rolls. Papers can be treated with optical brighteners, which act as distinct tag/trace molecules with fluorescent properties. A fluorescence pattern on the fuser roll can be changed in accordance with the edge density distribution in the print engine, when paper edges are accumulated on the fuser roll surface. A photo detector can capture a two-dimensional, digital image of the fluorescence pattern on the fuser roll surface to be measured, after illuminating the fuser roll, with intensity near ultraviolet range, by a light source. An image processor with a parameterized model can measure changes in the fluorescence pattern by analyzing the digital image of the fuser roll surface in order to determine the level of edge wear on the fuser rolls.
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Bonsignore Frank John
Crispino Phillip Stephen
Hamby Eric Scott
Viturro R. Enrique
Bonnette Rodney
Gray David M
Lopez Kermit D.
Ortiz Luis M.
Ortiz & Lopez PLLC
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