Electrophotography – Control of electrophotography process – Control of transfer
Patent
1997-08-05
1999-07-20
Royer, William
Electrophotography
Control of electrophotography process
Control of transfer
G03G 1500
Patent
active
059266694
ABSTRACT:
An ordinary printing mode of forming an image and a transfer adjusting mode are provided and changed over. Under a condition of setting to the transfer adjusting mode, a pattern forming unit controls an exposing unit and thereby forms a toner image of a test pattern on a circumferential surface of a photosensitive body. A transfer controlling unit changes the transfer condition for electrostatically absorbing the toner image. An electric potential measuring unit measures a surface electric potential at a specified position. A condition detecting unit detects a condition of minimizing a rate ".DELTA.Vs/.DELTA.T" of a variation .DELTA.T of the transfer condition and a variation .DELTA.Vs of the surface electric potential on the photosensitive body. A condition setting unit adjusts the transfer condition in the ordinary printing mode based on the above transfer condition, and thereby the transfer unit can be adjusted to an optimum state.
REFERENCES:
patent: 5278613 (1994-01-01), Bisaiji et al.
patent: 5296903 (1994-03-01), Suzuki et al.
patent: 5510886 (1996-04-01), Sugimoto et al.
patent: 5631725 (1997-05-01), Harasawa et al.
Iwata Naoko
Sugimoto Hiroyuki
Ricoh & Company, Ltd.
Royer William
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