Patent ID: 8709697

Claim:
A method of manufacturing a toner comprising: supplying a fluid comprising a resin and a coloring agent to a retaining member comprising a film having multiple discharge orifices therein; discharging droplets of the fluid from the multiple discharge orifices at a speed of from 2 to 4 m/sec by applying a pulse voltage having a trapezoid waveform to a piezoelectric body having a surface portion provided substantially parallel to the film to move the surface in a direction away from the film relative to an at-rest reference position of the surface, holding the surface thereat for a predetermined time, and bringing the surface back to the reference position; wherein the pulse voltage having a trapezoid waveform has a frequency smaller than a resonance frequency of the film; and solidifying droplets of the fluid discharged from the multiple discharge orifices to form mother particles; wherein the piezoelectric body has a primary resonance frequency f, which satisfies the following relationship: N−0.1<4fT 1 <N+0.1; wherein N represents an integer, and T 1 represents a time required for the pulse voltage to be decreased from the reference voltage V to 0.