Ricoh Company, Ltd.

Mugiziroh Uno

Hiroshi Hosokawa

Eisaku Murakami

Hiroshi Saitoh

Tetsuo Yamanaka

Toshihiro Sugiyama

Kazuhiro Yuasa

Yoshiaki Tanaka

Iwao Matsumae

Satoru Komatsubara

Shuichi Endoh

Eizi Takenaka

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.

Developing apparatus for electronic photographic recording equipment,

Growing community of inventors

Isehara, Japan

Mugiziroh Uno