Electrophotography – Image formation – Transfer
Reexamination Certificate
2008-05-27
2008-05-27
Gray, David M. (Department: 2852)
Electrophotography
Image formation
Transfer
C399S314000
Reexamination Certificate
active
10547933
ABSTRACT:
A combined resistance R1=Vt1/I1(MO) of a transfer belt (61) and a recording sheet obtained when a transfer current I1(μA) passes through the transfer belt (61) and the recording sheet upon application of a first transfer bias voltage Vt1(V) to a transfer roller (6b) from a high-voltage power source (6f) and a combined resistance R2=Vt2/I2(MO) of the transfer belt (61) and the recording sheet obtained when a transfer current I2(μA) passes through the transfer belt (61) and the recording sheet upon application of a second transfer bias voltage Vt2(V) to the transfer roller (6b) from the high-voltage power source (6f), are established to have the relationship: R2/R1=7 ?(I2)−0.5therebetween.
REFERENCES:
patent: 2001/0031160 (2001-10-01), Tanaka
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patent: 10-228186 (1998-08-01), None
patent: 11-38790 (1999-02-01), None
patent: 2003-29538 (2003-01-01), None
Ishii Hiroshi
Iwakura Yoshie
Masuda Yoshiaki
Sawa Yoko
Takiguchi Toshiki
Birch & Stewart Kolasch & Birch, LLP
Gray David M.
Sharp Kabushiki Kaisha
Wong Joseph S.
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