Electrophotography – Image formation – Development
Reexamination Certificate
2005-05-24
2005-05-24
Ngo, Hoang (Department: 2852)
Electrophotography
Image formation
Development
C399S237000
Reexamination Certificate
active
06898404
ABSTRACT:
A liquid-development electrophotographic apparatus forms on a toner-image-bearing body a plurality of color images developed by a plurality of developing units, one for each color, that use liquid toner. One or more carrier-removing units for removing excessive carrier from a toner layer that forms a toner image are disposed downstream of each developing unit and upstream of the next developing unit disposed upstream of the former developing unit with respect to a process progress direction. Each carrier-removing unit includes two or more conductive collection rollers to which a bias voltage is applied in such a direction as to press toner against the toner-image-bearing body and which is brought into contact with the toner-image-bearing body. The upstream roller is rotated in the same direction as the direction of surface movement of the toner-image-bearing body, whereas the downstream roller is rotated in the opposite direction. The result is that influence of carrier on the already transferred image is suppressed, and hence occurrences of irregular transfer of the images and occurrences of disturbance of the already transferred image are minimized.
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Hongawa Hironaga
Inamoto Akihiko
Nagata Isao
Nakashima Yutaka
Nishikawa Tadashi
Ngo Hoang
PFU Limited
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