Charge roller for noncontact charging across a charge gap,...

Details Charge roller for noncontact charging across a charge gap,... Charge roller for noncontact charging across a charge gap,...

2006-10-26

2008-12-02

Grainger, Quana M (Department: 2852)

Electrophotography

Image formation

Charging

Reexamination Certificate

active

07460815

ABSTRACT:
A charge roller includes a core, a resistive layer disposed on a circumferential surface of the core to charge an image-bearing member without contact, and gap members formed of tape-shaped films. These films are fixed to both ends of the charge roller by winding each of the films in a direction opposite a rotational direction of the charge roller in use and perpendicular to the axial direction thereof to form n layers (wherein n≧2) extending in the axial direction at every position in the circumferential direction of the charge roller. The gap members are pressed against a circumferential surface of an image-bearing member to define a charge gap between the image-bearing member and the charge roller.

REFERENCES:
patent: 7366447 (2008-04-01), Mukai et al.
patent: 2007/0025766 (2007-02-01), Kamoshida et al.
patent: 2001-296723 (2001-10-01), None

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