Electrophotography – Image formation – Transfer
Reexamination Certificate
2008-02-20
2011-11-08
Gray, David (Department: 2852)
Electrophotography
Image formation
Transfer
C399S317000, C399S388000
Reexamination Certificate
active
08055170
ABSTRACT:
In an image forming apparatus, a pre-transfer guide (50) is provided immediately before a transfer nip portion formed by an intermediate transferring belt (12) and a transferring roller (18b). The pre-transfer guide (50) extends in a width direction of a sheet conveying path, and projections (50b) are formed on opposite end portions of the pre-transfer guide (50) on sides outer than an area on which a sheet is conveyed. The intermediate transferring belt (12) is driven in a state where a tension is applied to some extent, so that it may bow in a thickness direction on a running path. However, in an area immediately before the transfer nip portion, the projections (50b) retains a distance between the sheet and the intermediate transferring belt (12) to be greater than a predetermined distance.
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patent: 7424257 (2008-09-01), Yoo et al.
patent: 7664445 (2010-02-01), Nishida et al.
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patent: 11-288188 (1999-10-01), None
Evans Geoffrey
Gray David
Hespos Gerald E.
Kyocera Mita Corporation
Porco Michael J.
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