Image transfer member, image transfer device and image...

Details Image transfer member, image transfer device and image... Image transfer member, image transfer device and image...

2005-11-17

2008-03-11

Gray, David M. (Department: 2852)

Electrophotography

Image formation

Transfer

C399S308000, C399S310000

Reexamination Certificate

active

07343128

ABSTRACT:
An image transfer member, an image transfer device and an image forming system employing the image transfer member and device are disclosed. The image transfer member comprises a base layer, and a surface layer formed from a semi-conductive material above the base layer to receive the developer image transferred from the photoconductor. The surface layer forms a contact inscribed angle θ in the range of 10° to 50° between the surface thereof and the developer image. The image transfer member has a voltage-current characteristic exhibiting a current density (CD) in the range of 0.6 μA/cm2≦CD≦1.5 μA/cm2at 1 KV voltage, and a voltage decay characteristic exhibiting a voltage decay time (DT) in the range of 0.4 sec≦DT≦3 sec for the voltage decay from 500 V to 100 V. The present invention avoids a transfer defect such as transfer void produced by breakdown caused when a high bias voltage is applied to a developer image having a high electric charge and to significantly improve the transfer efficiency.

REFERENCES:
patent: 6026269 (2000-02-01), Setoriyama
patent: 6042917 (2000-03-01), Schlueter et al.
patent: 6044243 (2000-03-01), Hara
patent: 6922542 (2005-07-01), Mizuno et al.
patent: 8-160753 (1996-06-01), None
patent: 11-153910 (1999-06-01), None
patent: 11-167294 (1999-06-01), None
patent: 2004-45637 (2004-02-01), None
patent: 97-16852 (1997-04-01), None

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