Image forming apparatus for recording on two sides in a...

Details Image forming apparatus for recording on two sides in a... Image forming apparatus for recording on two sides in a...

2006-05-30

2006-05-30

Tran, Hoan (Department: 2852)

Electrophotography

Image formation

Transfer

Reexamination Certificate

active

07054587

ABSTRACT:
An image forming apparatus for recording on two sides in a single pass, with which the transfer of a toner image onto one side of a recording medium and the transfer of a toner image onto the other side can both be performed under optimal conditions, which results in an increase in image quality. Contact-type transfer rollers are used as secondary and tertiary transfer means, so unlike with a transfer charger (a non-contact type of transfer means), there is no discharge product. A toner image that has been once transferred from an image support onto a recording medium is prevented from being retransferred back onto the image support, and a toner image that has been transferred onto the recording medium by the action of a first transfer member is prevented from being retransferred to the image support when a toner image is transferred onto the recording medium by the action of a second transfer member.

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