Nippon Iron Powder Co. Ltd.

Fuji Xerox Co., Ltd.

Kao Corporation

Powdertech Co., Ltd.

Toshio Honjo

Takayoshi Aoki

Ikutaroh Nagatsuka

Masayuki Takeda

Kenji Uchida

Kazuhiro Itoh

Shinichiro Yasuda

Yoshihiro Fukushima

Masayoshi Nawa

Yuji Sato

Yukio Seki

A developer for electrostatic photography comprises toner and carrier coated with a composition comprising a silicone resin having (II) and (II') and at least one compound represented by following formula (III), (IV) or (V): ##STR1##

Developer for electrostatic image comprising coated carrier

A carrier for developer is disclosed, which is produced by a process including the steps of mixing and heating a carrier material containing a binder resin and a magnetic powder and essentially free of solvent to obtain a molten dispersion of the magnetic powder in the resin; spraying the molten dispersion into droplets; and cooling the droplets to solidify the droplets into carrier particles. The carrier has excellent sphericality, high surface smoothness, and long life when used as a component of a two-component type developer in electrophotography.

Carrier for electrophotographic developer

A process for producing carriers for a developer is disclosed, which comprises mixing and heating a carrier material containing a binder resin and a magnetic powder, and essentially free of solvent, to obtain a molten dispersion of the magnetic powder in the binder resin; spraying the molten dispersion into liquid droplets; and cooling the droplets to solidify the droplets into carrier particles. The process eliminates the use of solvents and produces carrier particles of superior toughness, surface smoothness, and sphericality.

Process for producing carriers for developer

A carriers for electrophotographic development which comprises essentially a disintegrated powder of granules consisting essentially of the compound represented by the formula

Ferrite carriers for electrophotographic development

Growing community of inventors

Chiba, Japan

Toshio Honjo