Developing apparatus and method including grooved developer carr

Details Developing apparatus and method including grooved developer carr Developing apparatus and method including grooved developer carr

1993-05-24

1995-02-07

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

118653, 430120, G03G 1508, G03G 1509

Patent

active

053879660

ABSTRACT:
A developing apparatus having an improved construction for a developer carrying roller, particularly the developing roller which applies developer to a photosensitive body which carries a latent image. The developing roller or developer carrying roller includes a dielectric surface having a groove or grooved surface thereon formed, for example, by engraving, with the groove preferably extending along a central portion of the roller corresponding to the width of the latent image forming area of the photosensitive body. Preferably, the groove imparts a surface roughness in the axial direction of the roller in the range of 5-30 .mu.m, with the width of the groove not greater than 400 .mu.m. The roller may be formed such that adjacent grooved portions are immediately adjacent one another, or a smoothed flat portion may be interposed between adjacent grooved portions.

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