Developer regulating member with surface roughness parameters

Details Developer regulating member with surface roughness parameters Developer regulating member with surface roughness parameters

2007-10-30

2007-10-30

Grainger, Quana (Department: 2852)

Electrophotography

Image formation

Development

C399S284000

Reexamination Certificate

active

11255974

ABSTRACT:
A developer regulating member abutting against a developer carrying member carrying a mono-component developer to regulate the layer thickness of the developer on the developer carrying member has a supported portion supported by a support member, and an abutting portion abutting against the developer carrying member, the surface roughness parameters of this abutting portion satisfying the following expressions (1) to (5):in-line-formulae description="In-line Formulae" end="lead"?0.30≦Sm≦0.170  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Rpk≦2.0  (2)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Rp≦5.0  (3)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.10≦Rvk×(100−Mr2)/100≦1.30  (4)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Rpk<Rvk,  (5)in-line-formulae description="In-line Formulae" end="tail"?where Sm is a mean spacing [mm] of profile irregularities prescribed by JIS-B0601-1994, Rp is a maximum profile peak height [μm] prescribed by ISO4287-1997, Rpk is an initial wear height [μm] prescribed by DIN4776, Rvk is an oil retaining depth [μm] prescribed by DIN4776, and Mr2is a profile bearing length ratio 2 [%] prescribed by DIN4776.

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