Kanto Denka Kogyo Co., Ltd.

Hoganas Ab

Tokyo Shibaura Denki Kabushiki Kaisha

Kazuyoshi Oka

Kenkichi Hara

Ulf F Engstrom

Mitsuhiro Katayama

Tamotsu Murakami

Tsugifusa Hashimoto

Shigeo Yokoe

Svenn E Larssen

Svenn E Larrssen

Svenn-Erik Larssen

Toshihiko Kohno

A novel carrier material useful in conjunction with a toner for preparing a two-component developer for electrophotographic processes is provided. The carrier comprises a spherical magnetite particulate material having a reduced metallic iron outer layer which is coated with an outermost resinous layer for conditioning the copying properties of the carrier.

Method of making carrier for use in electrophotographic developers

Carrier for use in electrophotographic developers

A noval carrier powder for electrophotographic developers is provided. The carrier powder comprises spherical magnetite particles having a wustite (FeO) content of less than 10% by weight, a particle diameter of 30-200 .mu.m and a surface porosity of less than 20%.

A carrier for use as a component in electrophotographic two-component developers which is improved in durability of the triboelectric property by coating the surface of the iron core particles of carrier with a resinous composition comprised essentially of an epoxy-hydroxy hydrocarbon resin and an acrylic resin.

Two-component resin system of acrylic and diene polymers for coating

A carrier for use as a component in electrophotographic two-component developers which is improved in durability of the triboelectric property by coating the surface of the iron core particles of carrier with a resinous composition comprised essentially of an epoxy-hydroxy hydrocarbon resin and a silicone resin.

Resin-coated carrier for use in two-component electrophotographic

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Gunma, Japan

Kazuyoshi Oka