Developing apparatus and electrostatic record apparatus

Details Developing apparatus and electrostatic record apparatus Developing apparatus and electrostatic record apparatus

2005-04-12

2005-04-12

Tran, Hoah (Department: 2852)

Electrophotography

Image formation

Development

C399S276000, C399S277000

Reexamination Certificate

active

06879800

ABSTRACT:
A position where a transport amount regulation member is opposed to a developing roller is in an area wherein the magnetic flux density in the tangent line direction becomes 95% or less of the maximum value upstream in the developer transport direction from the position at which the magnetic flux density in the normal direction formed by two magnetic poles on both sides of the transport amount regulation member on the sleeve roller surface of the developing roller becomes 0 gausses and is in an area wherein the magnetic flux density in the normal direction becomes 90% or less of the maximum value of the upstream pole in the developer transport direction.

REFERENCES:
patent: 5239343 (1993-08-01), Sakemi et al.
patent: 6330415 (2001-12-01), Imamura et al.
patent: 6668147 (2003-12-01), Ikeguchi
patent: 07044021 (1995-12-01), None
patent: 8-87173 (1996-04-01), None

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