Electrophotography – Image formation – Transfer
Reexamination Certificate
2006-02-27
2008-09-23
Ngo, Hoang (Department: 2852)
Electrophotography
Image formation
Transfer
C399S302000
Reexamination Certificate
active
07428400
ABSTRACT:
A primary transfer unit includes transfer units for performing a toner transfer from image carriers onto a transfer belt. Each of the transfer units is formed with a metallic roller. The metallic roller is arranged so as to satisfy θ1<θ2, where an angle of the endless belt with respect to a tangent to the image carrier, on a side upstream of rotation of the endless belt to a transfer nip region where the image carrier and the endless belt are in contact is θ1, and an angle of the endless belt with respect to the tangent, on a side downstream of rotation of the endless belt to the transfer nip region is θ2.
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Adachi Tomoya
Iwakura Yoshie
Kawasaki Akihiro
Miyazaki Takafumi
Takehara Atsushi
Ngo Hoang
Ricoh Company Limited
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