Electrophotography – Control of electrophotography process – Control of transfer
Patent
1998-07-28
2000-05-30
Royer, William
Electrophotography
Control of electrophotography process
Control of transfer
399310, 399311, G03G 1500
Patent
active
060700246
ABSTRACT:
A copier includes a transfer charger for electrostatically transferring a toner image which is formed on a surface of a photoelectric drum to a sheet and a separation charger for separating the sheet with a toner image transferred thereto from the drum surface. A transfer guide is provided on a conveying path upstream of the transfer charger to guide the sheet toward a transfer point provided relative to the photosensitive drum. A separation supporter for supporting the sheet is provided above the separation charger. A transfer output from the passing of a leading edge portion of the sheet through the transfer point to the supporting of it by the separation support is switched to a High level, a transfer output from the supporting of the leading edge portion of the sheet until just before the trailing edge of the sheet is moved away from the transfer guide is set to a Middle level, and a transfer output from the moving of the trailing edge portion of the sheet away from the transfer guide until it is passed through the transfer point is set to a Low level. By doing so it is possible to uniformly print a sheet from a leading edge to a trailing edge and form a better-quality image.
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Kabushiki Kaisha Toshiba
Noe William A.
Royer William
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