Abstract: A method of manufacturing toner is provided. In the method, toner constituents are dissolved or dispersed in an organic solvent to prepare a toner constituents liquid. The toner constituents liquid is degassed so that the toner constituents liquid includes dissolved oxygen in an amount of 3 mg/L or less. The toner constituents liquid is vibrated in a chamber having at least one nozzle to form a liquid column resonance standing wave in the toner constituents liquid. The toner constituents liquid is discharged from the nozzle disposed within an area including an antinode of the liquid column resonance standing wave to form the toner constituents liquid into liquid droplets. The liquid droplets are dried to solidify the liquid droplets into solid particles.

Abstract: A toner produced by a method including dissolving or dispersing toner components comprising a resin, a colorant, and a release agent in a solvent to prepare a toner components liquid, discharging the toner components liquid from multiple nozzles provided on a thin film by vibrating the thin film by a mechanical vibration unit to form liquid droplets, and drying the liquid droplets into solid particles of the toner. The particle diameter distribution that is a ratio of a weight average particle diameter to a number average particle diameter of the toner is between 1.00 and 1.15, and a weight average particle diameter of the release agent in the toner is between 1% and 30% of an aperture diameter of the nozzle.

Abstract: An apparatus for producing a toner, including a liquid droplet-forming unit configured to discharge a toner composition liquid containing at least a resin and a colorant at a uniform discharge speed from a plurality of discharge holes some of which have different shapes from each other to thereby form liquid droplets, and a particle-forming unit configured to solidify the liquid droplets of the toner composition liquid to thereby form particles.

Abstract: A method for producing a toner, including ejecting a toner composition liquid containing at least a resin and a colorant periodically from a plurality of nozzles into a chamber using a vibration unit, so as to form droplets in a gas phase; and solidifying the droplets, wherein the droplets are transported by transport air flow selected from at least one of vertical downward air flow and rotational air flow, and the method can prevent toner particles from aggregation.

Abstract: A method of manufacturing toner includes forming liquid droplets. The forming liquid droplets includes vibrating a toner constituents liquid in a liquid column resonance liquid chamber having a plurality of nozzles to form a liquid column resonance pressure standing wave therein, and discharging the toner constituents liquid from the nozzles. The method further includes solidifying the liquid droplets. The toner constituents liquid includes an organic solvent and toner constituents dissolved or dispersed in the organic solvent. The toner constituents include a resin, a colorant, and a release agent. The nozzles are disposed within an area including an antinode of the liquid column resonance pressure standing wave. One of the nozzles disposed closer to a node of the liquid column resonance pressure standing wave has a smaller outlet diameter than that disposed farther from the node. The toner constituents liquid is applied with a uniform pressure at a vicinity of each nozzle.

Abstract: The particulate material production method includes vibrating a particulate material composition liquid in a liquid column resonance chamber having at least one nozzle to form a standing wave in the particulate material composition liquid caused by liquid column resonance, so that droplets of the particulate material composition liquid are ejected in a droplet ejection direction from the nozzle so as to fly in a space in a flight direction; feeding a gas in a direction substantially perpendicular to the droplet ejection direction to change the flight direction of the ejected droplets; and solidifying the droplets in the space to produce a particulate material. The particulate material composition liquid includes at least a solvent and a component of the particulate material dissolved or dispersed in the solvent, and the nozzle is located at a location corresponding to an anitnode of the standing wave.

Abstract: A method of manufacturing a toner including supplying a fluid containing a resin and a coloring agent to a retaining member including a film having multiple discharge orifices, discharging droplets of the fluid from the multiple discharge orifices at a speed of from 2 to 4 m/s by applying a pulse voltage having a trapezoid waveform to a piezoelectric body having a surface provided substantially parallel to the film to move the surface in a direction away from the film relative to a reference position of the surface followed by holding the surface there for a predetermined time, and bringing the surface back to the reference position; and solidifying droplets of the fluid discharged from the multiple discharge orifices to form mother particles.

Abstract: A cleaning method for cleaning a droplet ejector, which includes nozzles to eject a particulate material composition liquid, and a nozzle plate bearing the nozzles is provided. The cleaning method includes forming a substantially closed cleaning space outside the nozzles and the nozzle plate; supplying a cleaning liquid to the cleaning space so that the nozzles and the nozzle plate are contacted with the cleaning liquid; and vibrating the cleaning liquid when the nozzles and the nozzle plate are contacted with the cleaning liquid to clean the nozzles and the nozzle plate.

Abstract: A method of manufacturing toner is provided. The method includes preparing a toner constituents liquid by dissolving or dispersing toner constituents in an organic solvent. The toner constituents includes a binder resin and a charge controlling agent. The charge controlling agent includes a polycondensation product of a phenol with an aldehyde. The method further includes forming a liquid column resonance standing wave in the toner constituents liquid in a chamber having at least one nozzle by vibrating the toner constituents liquid. The method further includes forming the toner constituents liquid into liquid droplets by discharging the toner constituents liquid from the nozzle. The nozzle is disposed within an area including antinodes of the liquid column resonance standing wave. The method further includes removing the organic solvent from the liquid droplets to solidify the liquid droplets.

Abstract: The particulate material production method includes vibrating a particulate material composition liquid in a liquid column resonance chamber having at least one nozzle to form a standing wave in the particulate material composition liquid caused by liquid column resonance, so that droplets of the particulate material composition liquid are ejected in a droplet ejection direction from the nozzle so as to fly in a space in a flight direction; feeding a gas in a direction substantially perpendicular to the droplet ejection direction to change the flight direction of the ejected droplets; and solidifying the droplets in the space to produce a particulate material. The particulate material composition liquid includes at least a solvent and a component of the particulate material dissolved or dispersed in the solvent, and the nozzle is located at a location corresponding to an anitnode of the standing wave.

Abstract: A method for producing toner particles by ejecting a liquid from at least one ejection hole to form the liquid into liquid droplets, and solidifying the liquid droplets to produce toner particles. The ejecting is accomplished by applying a vibration to the liquid in a liquid column resonance-generating liquid chamber in which an ejection hole is formed to form a standing wave through liquid column resonance, and ejecting the liquid from the ejection hole which is formed in a region corresponding to an antinode of the standing wave to thereby form the liquid into the liquid droplets. Toner produced by the method.

Abstract: A particulate material production apparatus is disclosed. The particulate material production apparatus includes a droplet ejector to eject droplets of a particulate material composition liquid or a melted particulate material composition in a droplet ejection direction from nozzles; a solidifying device to solidify the droplets; a first airflow forming device to form a first airflow to feed the ejected droplets to the solidifying device with the first airflow; and a second airflow forming device to form a second airflow to apply the second airflow the droplets before the droplets are fed by the first airflow. The second airflow forming device forms the second airflow by supplying a pressed gas from a slit, and the traveling direction of the first airflow is substantially perpendicular to the droplet ejection direction.

Abstract: A method of manufacturing toner is provided, including discharging a toner constituents liquid from multiple nozzles to form liquid droplets and solidifying the liquid droplets into toner particles. The multiple nozzles satisfy the following formula: 2.5?p/d?7.5 wherein d represents an outlet diameter of each nozzle and p represents an interval between two nozzles.

Abstract: A method of preparing a toner, including periodically dripping and discharging droplets of a toner constituent liquid comprising a resin and a colorant with a dripper comprising a thin film comprising plural nozzles configured to discharge the droplets, and an electromechanical converter configured to oscillate the thin film; and solidifying the droplets to form toner particles, wherein the nozzle has an aperture discharging the droplet, having a circular or an ellipsoidal cross-sectional shape and cross-sectional area smaller than a cross-sectional area of another aperture contacting the toner constituent liquid.

Abstract: An apparatus for manufacturing fine particles is provided. The apparatus includes a liquid droplet discharge device and a liquid droplet solidification device. The liquid droplet discharge device has multiple nozzles. The liquid droplet discharge device is adapted to discharge a liquid from the multiple nozzles to form the liquid into liquid droplets. The liquid comprises a solvent in which constituents of the fine particles are dissolved or dispersed or a melt of constituents of the fine particles. The liquid droplet solidification device is adapted to solidify the liquid droplets by an airflow. The multiple nozzles are arranged in a manner such that each of the nozzles does not overlap each other relative to a direction of the airflow.

Abstract: A toner manufacturing method, a toner manufacturing apparatus, and a toner are disclosed. The toner manufacturing apparatus includes a droplet generating unit that includes a thin film in which plural nozzles are formed, and an annular vibrating unit that is arranged at a perimeter of a deformable domain of the thin film for vibrating the thin film; a storage unit for storing a toner-containing liquid that includes at least a resin and a colorant, and for supplying the toner-containing liquid 10 to the droplet generating unit; and a granulating unit for solidifying droplets that are periodically breathed out from the nozzles of the droplet generating unit to form toner particles.

Abstract: A toner produced by dissolving or dispersing toner components comprising a binder resin, a colorant, and a charge controlling agent in an organic solvent to prepare a toner components liquid, forming liquid droplets of the toner components liquid in a gas phase, and solidifying the liquid droplets into toner particles of the toner. The charge controlling agent includes a polycondensation reaction product of a phenol with an aldehyde.

Abstract: A method for producing a toner, containing: ultrasonically vibrating a liquid toner composition in which a toner material containing at least a binder resin and a colorant is dissolved or dispersed in a solvent; introducing the liquid toner composition to a liquid chamber, and ejecting the liquid toner composition as droplets from an ejecting plate having a plurality of holes and disposed on one surface of the liquid chamber; and drying and solidifying the droplets so as to produce a toner, wherein the ultrasonically vibrating is performed before the introducing the liquid toner composition to the liquid chamber.

Abstract: A method of producing particulate, including introducing an initial liquid including a particulate component in a lower concentration than that of a liquid including a particulate component or no concentration to a projection hole of a droplet projector so as to be projected at the start of the discharging; discharging a droplet of the liquid comprising a particulate component from the projection hole; and solidifying the droplet to form a particulate.

Abstract: A particulate production apparatus, including a droplet discharger to discharge a liquid including a particulate element which is solidified to become a particulate; and a pressure controller to feed the liquid including a particulate element to the droplet discharger at a pressure within a desired range.