Electrophotography – Control of electrophotography process – Of plural processes
Reexamination Certificate
2005-09-06
2005-09-06
Grimley, Arthur T. (Department: 2852)
Electrophotography
Control of electrophotography process
Of plural processes
C399S308000, C399S372000
Reexamination Certificate
active
06941083
ABSTRACT:
The image forming apparatus having an image deviation correction function of the present invention measures passing waveforms of correction patterns on a transfer belt printed in the main scanning direction in a relationship of a reflected image and correction patterns thermally fixed on a sheet of paper by detection sensors and from measured results, obtains main scanning magnification Sp2and center position deviation amount ZCRfor double-side horizontal deviation correction with high accuracy. During double-side image forming, a toner image on the first side is printed at a main scanning magnification of 100%, while a toner image on the second side is printed using a correction signal to which main scanning magnification Sp2and center position deviation amount ZCRare applied, thus horizontal deviation of double-side image forming is corrected.
REFERENCES:
patent: 2000-305324 (2000-11-01), None
patent: 2002-006718 (2002-01-01), None
patent: 2002091112 (2002-03-01), None
patent: 2003-241610 (2003-08-01), None
U.S. Appl. No. 10/724,157, filed Dec. 1, 2003, Muratani.
Grimley Arthur T.
Lee Peter
Toshiba Tec Kabushiki Kaisha
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