Developer-supplying roller having a surface-modifying powder

Details Developer-supplying roller having a surface-modifying powder Developer-supplying roller having a surface-modifying powder

1995-12-19

1997-12-09

Ramirez, Nestor R.

Electrophotography

Image formation

Development

G03G 1508

Patent

active

056970285

ABSTRACT:
A developing apparatus is provided which includes a developing chamber for containing a developer, a developer-carrying member for carrying and conveying the developer to a developing region, and a developer-supplying member abutted rotatably to the developer-carrying member. The developer-supplying member has surface-modifying powder at least at its surface. The powder has substantially no chargeability or a chargeability of a polarity equal to that of the developer and a magnitude in terms of absolute value equal to or smaller than that of the developer. By application of the surface-modifying powder, the developing apparatus can obviate a partial tearing of a surface portion of the developer-supplying member which leads to image defects and an increase in drive torque at the initial drive thereof.

REFERENCES:
patent: 4505573 (1985-03-01), Brewington et al.
patent: 4930438 (1990-06-01), Demizu et al.
patent: 5235386 (1993-08-01), Yano et al.
patent: 5287150 (1994-02-01), Kinoshita et al.
patent: 5307127 (1994-04-01), Kobayashi et al.
patent: 5321482 (1994-06-01), Yano et al.

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