Patent ID: 7585607

Claim:
A method of manufacturing a toner comprising: dissolving or dispersing a toner component comprising a colorant and a resin in an organic solvent to obtain a dissolved or dispersed liquid; continuously emulsifying and dispersing the dissolved or the dispersed liquid in an aqueous medium comprising a particulate dispersant to obtain emulsified primary particles; controlling cohesion and agglomeration of the emulsified primary particles; and removing the organic solvent, wherein the method is performed using an emulsification device, a dispersion liquid accumulation portion, one or more piping structures having one or more controlling devices, a cohesion and agglomeration controlling tank and one or more introduction lines; wherein the introduction lines are connected to the accumulation portion, the emulsification device is connected to the accumulation portion, and the accumulation portion is connected by the piping structures to the controlling device and then to the controlling tank; wherein a ratio (T 1 /T 2 ) of an arithmetic mean accumulation time (T 1 ) of the emulsified primary particles in the one or more piping structures to an arithmetic mean accumulation time (T 2 ) of the emulsified primary particles in the emulsification device and dispersion liquid accumulation portion is from 1 to 5, wherein the arithmetic mean accumulation time (T 1 ) is calculated by dividing total volume of a portion of the one or more piping structures filled with the liquid with a total amount of liquid flowing through the one or more introduction lines and wherein the arithmetic mean accumulation time (T 2 ) is calculated by dividing a sum of volumes of the emulsification device and dispersion liquid accumulation portion with the total amount of liquid flowing through the one or more introduction lines.