Ricoh Company, Ltd.

Kazuyuki Matsui

Noboru Kuroda

Hiroshi Takahashi

Masato Kobayashi

Satoshi Okano

Nobuyasu Makino

Kenichi Uehara

Takahiro Kadota

Masashi Miyakawa

Eisuke Sugisawa

Kifuku Takagi

Keiko Watanabe

A method of manufacturing a toner including dissolving or dispersing a toner component containing a colorant and a resin in an organic solvent to obtain a liquid solution or dispersion, continuously emulsifying and dispersing the liquid solution or dispersion in an aqueous medium containing a particulate dispersant to obtain emulsified primary particles, controlling cohesion and agglomeration of the emulsified primary particles and removing the organic solvent, such that the ratio (T/T) of the arithmetic mean accumulation time (T) of the emulsified primary particles obtained in the controlling step to the arithmetic mean accumulation time (T) of the emulsified primary particles obtained in the continuously emulsifying and dispersing step is from 1 to 5.

Method of manufacturing toner, the toner produced thereby, developer containing the toner and an image forming apparatus using the toner

A method for producing a toner including dissolving or dispersing a toner constituent mixture including a binder resin and a colorant in an organic solvent to prepare a toner constituent mixture liquid; dispersing the toner constituent mixture liquid in an aqueous medium including a particulate dispersant to prepare an emulsion; and removing the organic solvent from the emulsion while applying a shearing force to the emulsion. A toner manufactured by the method and having a spindle form while satisfying specific particle diameter relationships. An image forming apparatus using the toner. A toner packing method and device in which the toner is fluidized and pressurized to be fed from a fluidizing container to a toner container on which a gas-powder separation sieve is set to discharge air therefrom.

Toner, method for manufacturing the toner, method and device for packing the toner, and image forming apparatus using the toner

A classifying device including an upper, dispersing chamber for dispersing solid particles supplied thereto together with a carrier gas, and a lower, classifying chamber directly connected to a lower end of the dispersing chamber for centrifugally classifying the solid particles, supplied from the dispersing chamber to the classifying chamber, into relatively fine particles and relatively coarse particles. The dispersing chamber is provided with a rotor for swirling the solid particles in the dispersing chamber.

Classifying device

Growing community of inventors

Fuji, Japan

Kazuyuki Matsui