Electrophotography – Control of electrophotography process – Control of transfer
Reexamination Certificate
2006-12-19
2006-12-19
Hirshfeld, Andrew H. (Department: 2858)
Electrophotography
Control of electrophotography process
Control of transfer
C399S049000
Reexamination Certificate
active
07151902
ABSTRACT:
A module, included in an electrophotographic printer, for making toner images by a method in which transfer current for electrostatic transfer of toner images to receiver members is adjusted to compensate for ambient variations of toner charge-to-mass ratio (q/m). A predetermined functional relationship between transfer current and a control voltage parameter is utilized. Magnitudes of the control voltage parameter are derived from voltage measurements relating to creation of toner control patches on a photoconductive image-recording member included in a modular electrophotographic printer. Control voltage magnitude is linearly dependent on q/m. The functional relationship, which is characterized by three experimentally determined parameters, is co-optimized for providing efficient transfer of toner images and for minimizing back-transfer of toner away from a receiver member in a transfer station included in the module.
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Rakov David M.
Shuster Frank A.
Wright Graham S.
Eastman Kodak Company
Hirshfeld Andrew H.
Kessler Lawrence P.
Natalini Jeff
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