Kanegafuchi Kagaku Kogyo Kabushiki Kaisha

Yasunori Matsunari

Yoshihisa Tawada

Kenji Kobayashi

Susumu Fukuda

Yasushi Kakehashi

Kazuyoshi Mimura

Shogo Miki

Shigeo Akimoto

Toshiaki Ishimaru

A developing apparatus of a toner delivery system by contacting a developer roller with an electrostatic latent image-carrying member eliminates a protective layer in the conventional concept from a surface of the developing roller, and provides a covering layer which is formed by adhering particles of toner or a material having electrical characteristics and mechanical characteristics equal to those of the toner on the surface of the developing roller. Those particles are adhered utilizing a surface tackiness of an elastomer layer itself which is a structural element of the developing roller.

Developing roller

A machine part used as a magnet roll for developing and a process for producing the same. The machine part constitutes a member of a developing machine for an electrophotographic process such as a copier and facsimile, and a laser printer as well. The machine part comprises a shaft having a resin-bonded magnet layer provided on the outer periphery thereof. The composite molding of a resin-bonded magnet is produced by molding and establishing a composition for a thermoplastic resin-bonded magnet comprising from 35 to 60 % by volume of a thermoplastic resin and from 40 to 65 % by volume of a hard ferrite powder into a cylinder of uniform thickness on the outer periphery of a shaft, obtained is a thin resin-bonded magnet layer having a surface roughness of 5 .mu.m or less and free of seams which have generated during molding, the thin resin-bonded magnet layer further having provided on the surface a plurality of magnetic poles at a small spacing.

Composite molding of resin-bonded magnet for machine parts and process

Growing community of inventors

Otsu, Japan

Yasunori Matsunari