Charge depositing member and image forming apparatus using the s

Details Charge depositing member and image forming apparatus using the s Charge depositing member and image forming apparatus using the s

1995-01-23

1996-10-29

Moses, R. L.

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355271, 361225, G03G 1502, G03G 1514

Patent

active

055701620

ABSTRACT:
A charge roller, transfer roller or similar charge depositing member, and an image forming apparatus using such a member. The charge depositing member has a surface portion made of a material whose electric resistance decreases with an increase in voltage applied to the member. A constant current power source applies the current to a core on which the surface portion is formed. The electric resistance of the material changes in an amount greater than 1 order and smaller than 3 order. The volume resistivity of the material is variable within a range of from 10.sup.6 .OMEGA.cm to 10.sup.11 .OMEGA.cm.

REFERENCES:
patent: 4379630 (1983-12-01), Suzuki
patent: 5177549 (1993-01-01), Ohtsuka et al.
patent: 5253022 (1993-10-01), Takeuchi et al.
patent: 5438399 (1995-08-01), Asai
patent: 5450180 (1995-09-01), Ohzeki et al.

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