Patent ID: 8304158

Claim:
A method for manufacturing a toner having a film which is formed on a toner base particle containing a binder resin and a colorant by adhering fine resin particles to a surface of the toner base particle, comprising: a pre-mixing step of obtaining a fine resin particle-fixed toner by fixing disaggregated fine resin particles obtained by disaggregating a secondary aggregate of fine resin particles, to a surface of the toner base particle, while mixing and stirring toner base particles and the fine resin particles using a rotary stirring apparatus, the rotary stirring apparatus comprising a rotary stirring section including a rotary disk having rotary vanes provided on the circumference thereof, and a rotary shaft, a temperature regulation section which is provided in at least a part of a powder passage including a rotary stirring chamber and a circulation tube and regulates the temperature in the rotary stirring section and the powder passage to a predetermined temperature, a circulating section which repeatedly circulates toner base particles and fine resin particles in the powder passage by the rotary stirring section, and a spraying section which sprays a liquid having the effect of plasticizing the toner base particle and the fine resin particles; and a coating step of spraying the liquid to the fine resin particle-fixed toner in a fluidized state obtained in the pre-mixing step with the spraying section, and spreading the fine resin particles on the surface of the toner base particle, thereby forming a film of the fine resin particles, using the rotary stirring apparatus, in the pre-mixing step and the coating step, temperature regulation being conducted in the temperature regulation section, and a pre-mixing stabilization temperature which is a temperature in the powder passage, elevated from the initiation point of the pre-mixing step and stabilized in the pre-mixing step being lower than a coating stabilization temperature which is a temperature in the powder passage, elevated from the initiation point of the coating step and stabilized in the coating step.