Developing apparatus for electronic photographic recording equip

Details Developing apparatus for electronic photographic recording equip Developing apparatus for electronic photographic recording equip

1995-06-07

1997-11-18

Lee, S.

Electrophotography

Image formation

Development

399272, 399285, G06G 1508

Patent

active

056897820

ABSTRACT:
A developing apparatus is capable of providing stable charging ability for a developer and stable transfer ability for transferring the developer to a photoreceptor for electronic photography to prevent residual positive images and stain of texture which appear on a toner image. A first toner transfer roller 23 has a core supported to be rotatable and a sheet type insulation layer wound around the outer periphery of the core. The insulation layer is made of elastic rubber in which magnetic material having a specified particle size is uniformly dispersed and the magnetic material is formed with ferromagnetic substance such as magnet and magnetized in advance. The first toner transfer roller 23 attracts toner T by actuating magnetism on the insulation layer since the magnetic material added to the insulation layer is magnetized.

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