Patent ID: 7498114

Claim:
A toner manufacturing process, comprising: kneading a mixed composition, to thereby obtain a kneaded composition; and spraying the kneaded composition with a high pressure gas from a high pressure nozzle having a plurality of spray nozzles, to thereby form a fine particle, wherein at least one residing zone is formed on a side surface of the plurality of spray nozzles, the at least one residing zone is configured to allow some of the gas flowing through the nozzle to temporarily reside therein before being ejected from the spray nozzle, wherein the high pressure gas has undergone intersection collisions, wherein the mixed composition is selected from the group consisting of the following <1>, <2>and <3>: <1> a first mixed composition comprising a binder resin, a colorant, and a charge controlling agent, <2> a second mixed composition comprising a binder resin, a colorant, a charge controlling agent, and a releasing agent, <3> a third mixed composition comprising a binder resin, a magnetic agent, a charge controlling agent, and a releasing agent, and wherein the high pressure nozzle has a vibrator causing a vibrational force of 500 N to 8000 N to the high pressure nozzle, with a frequency of 0.55 kHz to 2.00 kHz.