Patent ID: 8247154

Claim:
A method for producing a toner, comprising the steps of: obtaining an aqueous dispersion of colored resin particles by forming the colored resin particles by a wet method; obtaining the colored resin particles in wet state (wet cake) by supplying the aqueous dispersion of the colored resin particles to a belt filter and performing solid-liquid separation; and drying the wet cake, wherein a filter-cloth-continuous-running-type belt filter is used as the belt filter in the step of obtaining the wet cake, the filter comprising an lower endless filter cloth and an upper endless filter cloth which are tightly stretched by rollers; and the filter-cloth-continuous-running-type belt filter has a separation-washing mechanism, in which the aqueous dispersion of the colored resin particles is supplied on to the lower endless filter cloth of the belt filter, and the colored resin particles are separated and then washed to form the wet cake; and the filter-cloth-continuous-running-type belt filter has a pressure-ventilation roller which is one of the rollers and on which the wet cake is sandwitched by the upper endless filter cloth and the lower endless filter cloth, wound, pressed, and then, ventilated by gas supplied from a ventilation means of the pressure-ventilation roller, thus obtaining the wet cake having a low percentage of moisture content.