Electrophotography – Control of electrophotography process – Control of transfer
Patent
1998-03-23
1999-06-29
Smith, Matthew S.
Electrophotography
Control of electrophotography process
Control of transfer
399 44, 399297, G03G 1516
Patent
active
059180862
ABSTRACT:
Image density is detected by a B/W ratio detection integrator 30 via a video signal 11 from a video controller 40 when an image signal is inputted. When a latent image formed on a photosensitive body 7 in accordance with the image signal is transferred to a transfer material 12 by a transfer charging device 8, a transfer current of the transfer charging device 8 is controlled in a timely fashion by a CPU 20 in accordance with the image density detected from this image signal, thus ensuring optimum transfer efficiency. Even when the environment and printing pattern change for each part of a single-page image, this makes it possible to deal accurately with these changes to ensure stable transfer efficiency and good imaging.
REFERENCES:
patent: 4728991 (1988-03-01), Takayama et al.
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patent: 5291253 (1994-03-01), Kumasaka et al.
patent: 5717980 (1998-02-01), Oka et al.
patent: 5765074 (1998-06-01), Yasui et al.
Matsushita Kouji
Nakano Munenori
Okashita Tetsuya
Teranishi Tomohiko
Yamamoto Mineo
Minolta Co. , Ltd.
Smith Matthew S.
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