| Patent application number | Description | Published |
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| 20090011351 | METHOD OF MANUFACTURING TONER, TONER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - A toner capable of forming high quality images of excellent image reproducibility at high definition and high resolution, being decreased for the bleed-out of a wax ingredient to the surface, causing less filming to a photoreceptor and offset phenomenon in a high temperature region, is provided. The toner is manufactured by a method including a preliminary pulverizing step of pulverizing a melt-kneaded product of toner raw materials in a liquid to obtain a coarse powder slurry containing a coarse toner powder, a finely pulverizing step of passing the coarse powder slurry through a pressure resistant nozzle under heating and pressurization thereby further pulverizing the coarse toner powder to obtain a fine powder slurry containing a fine toner powder and in a heated and pressurized state, a cooling step of cooling the fine powder slurry, and a depressurizing step of depressurizing the fine powder slurry. | 01-08-2009 |
| 20090011358 | METHOD OF MANUFACTURING TONER, TONER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A method of manufacturing a toner in which uneven distribution of toner ingredients by subjecting them to fine dispersion is prevented and which is excellent in transferability, cleaning properties, anti-filming properties, anti-blocking properties, high-temperature offset resisting properties and transparency is provided. Melt-kneaded substances include binder resins, colorants and release agents, respectively. The colorant and the release agent are dispersed in the binder resin. The melt-kneaded substance is negatively charged by an anionic dispersant, whereas the melt-kneaded substance is positively charged by a cationic dispersant. An aggregate is formed by heteroaggregation of the melt-kneaded substances. The aggregate is fused by heating and formed into a spherical toner. | 01-08-2009 |
| 20090042119 | METHOD OF MANUFACTURING TONER PARTICLES, TONER PARTICLES, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A method of manufacturing toner particles capable of decreasing the manufacturing costs by simplifying the manufacturing apparatus and by decreasing the number of the steps, as well as to provide toner particles, a two-component developer, a developing apparatus and an image forming apparatus are provided. A high-pressure homogenizer is constituted by a tank, a feed pump, a high-pressure pump, a heat exchanger, a nozzle, a first depressurizing module, a cooling unit, a second depressurizing module and a take-out port arranged in this order. A flow path constituted in the first depressurizing module has a straight portion tilted with respect to a direction in which the aqueous slurry passes and a portion for relaxing the flow of the aqueous slurry. | 02-12-2009 |
| 20090117479 | Method and apparatus for manufacturing developer, and developer - The invention provides a method and an apparatus for manufacturing a developer, which can manufacture a developer having a uniform and fine particle shape in a narrow particle size distribution and having a coloring agent highly dispersed therein at the primary particle level, the method and apparatus at the same time enabling continuous and efficient production without opening and closing a reactor. The method comprises the steps of: dissolving a binding resin component in a supercritical or subcritical fluid so that the binding resin component is blended with a coloring agent component; and reducing the solubility of the binding resin component in the supercritical or subcritical fluid so that the binding resin component is precipitated in the form of particles with the coloring agent component dispersed in the interior thereof. In the aforementioned method and apparatus, the reactor provided with at least a stirring mechanism and a mechanism for discharging dissolved components has a developer material carrier comprising a mesh that prevents the passage of treated materials and allows the passage of the supercritical or subcritical fluid. | 05-07-2009 |
| 20090232557 | TONER, METHOD OF MANUFACTURING TONER, DEVELOPER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - The toner includes a plurality of toner particles containing a binder resin and a colorant. In toner particles, according to measurement by a flow particle image analyzer, the content of small size particles having a circle-equivalent diameter of 0.5 to 2.0 μm is 5% by number or less based on the entire toner particles, the content of medium size particles having a circle-equivalent diameter of more than 2.0 μm and 4.0 μm or less is 20% by number or more and 30% by number or less based on the entire toner particles, and the content of large size particles having a circle-equivalent diameter of more than 4.0 μm and 6.0 μm or less is 50% by number or more and 70% by number or less based on the entire toner particles, and the shape factor of the toner particles SF | 09-17-2009 |
| 20090258310 | PRODUCING METHOD OF SPHERICAL PARTICLE, SPHERICAL PARTICLE, TONER, DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - There are provided an economical method capable of obtaining very small resin particles, in particular, resin particles; resin particles produced by the method; a toner and developer containing the resin particles; a developing device; and an image forming apparatus. Spherical particles are produced according to a producing method of spherical particles including a pulverizing step. In the pulverizing step, a dispersion liquid of coarse particles of material to be processed, which includes a polymer dispersant and coarse particles of material to be processed dispersed in a liquid medium is passed through a high-pressure homogenizer having a stepwise pressure release mechanism and thereby coarse particles of material to be processed contained in the dispersion liquid are milled under conditions where the melt viscosity of the dispersion liquid at a time point of passing the nozzle portion of the high-pressure homogenizer may be 5000 cP or less. | 10-15-2009 |
| 20090297224 | METHOD FOR MANUFACTURING TONER, TONER, DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - A method for manufacturing a toner is provided. The method for manufacturing a toner uses a rotary stirring apparatus that includes a circulating section for repeatedly performing circulation in a powder passage having a rotary stirring chamber and a circulation tube to return to the rotary stirring chamber by a rotary stirring section having a rotary disc around which rotary blades are installed and a rotary shaft, and a temperature adjusting section provided at least on a part of the powder passage for adjusting temperatures in the powder passage and of the rotary stirring section to a predetermined temperature, and includes a temperature adjusting step; a fine resin particle adhering step; a spraying step; and a film-forming step. The temperature in the powder passage is adjusted to the predetermined temperature by the temperature adjusting section at the fine resin particle adhering step, the spraying step, and the film-forming step. | 12-03-2009 |
| 20100104323 | TONER, DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A toner is provided. The toner includes toner particles, and silica particles and inorganic fine particles that are externally added to the toner particles, the inorganic fine particles having an average primary particle size smaller than that of the silica particles. The toner particles have a shape factor SF- | 04-29-2010 |
| 20100159374 | METHOD FOR MANUFACTURING TONER, TONER, DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - A method for manufacturing a toner includes a pre-mixing step and a coating step. In the pre-mixing step, a secondary aggregate of the fine resin particles is disaggregated, while toner base particles and fine resin particles are mixed and stirred using a rotary stirring apparatus. Thus obtained disaggregated fine resin particles are fixed to the surface of the toner base particle. Thus, a fine resin particle-fixed toner is obtained. The rotary stirring apparatus includes a rotary stirring section, a temperature regulation section, a circulating section, and a spraying section. In the coating step, a liquid is sprayed to the fine resin particle-fixed toner with the spraying section using the rotary stirring apparatus. Thus, a film of the fine resin particles is formed. In the pre-mixing step and the coating step, temperature regulation is conducted in the temperature regulation section. | 06-24-2010 |
| 20100209145 | CAPSULE TONER, TWO-COMPONENT DEVELOPER, AND IMAGE FORMING APPARATUS - A capsule toner capable of enhancing low temperature fixation property without impairing preservation property under a high temperature environment, a two-component developer, and an image forming apparatus are provided. The capsule toner is constituted of toner particles having toner base particles and a coating layer for coating the surface thereof. The toner base particle includes styrene-acrylic resin or polyester resin as a binder resin, and the coating layer includes styrene-acrylic resin or polyester resin. The capsule toner contains 0.05% by weight or more and 0.70% by weight or less of volatile plasticizer based on a total amount of the capsule toner. | 08-19-2010 |
| 20100248114 | METHOD OF MANUFACTURING TONER, TONER OBTAINED BY METHOD THEREOF, ONE-COMPONENT DEVELOPER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - There are provided a toner manufacturing method of manufacturing a toner which has excellent characteristics such as fluidity and preservation stability and in which a resin layer having uniform thickness is formed on a surface of tone core particle, a toner obtained by a method thereof, a one-component developer, a two-component developer, a developing device, and an image forming apparatus. By using a toner manufacturing apparatus, a stirring step S | 09-30-2010 |
| 20100248124 | METHOD OF MANUFACTURING TONER, TONER OBTAINED BY METHOD THEREOF, ONE-COMPONENT DEVELOPER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A toner manufacturing method, a toner obtained by the method, a one-component developer, a two-component developer, a developing device and an image forming apparatus are provided. By using a toner manufacturing apparatus including a powder passage, a spraying section for spraying a predetermined substance in the powder passage and a rotary stirring section, provided in the powder passage, and stirring particles in the powder passage to apply impact force to the particles so that the particles are fluidized in the powder passage, performed are a stirring step S | 09-30-2010 |
| 20100303506 | METHOD OF MANUFACTURING RESIN-LAYER COATED CARRIER, RESIN-LAYER COATED CARRIER, DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - A manufacturing apparatus provided with a rotary stirring section and a powder passage is used to manufacture the resin-layer coated carrier. At a fine resin particle adhering step, a magnetic base particle and a fine resin particle are inputted into the powder passage with the rotary stirring section rotating and the fine resin particle is adhered onto the surface of the magnetic base particle. At a spraying step, at least a liquid that plasticizes the fine resin particles is sprayed with spray gas from a spraying section on the magnetic base particle and the fine resin particle which are in a fluidized state in the powder passage. At a film-forming step, rotation by the rotary stirring section is continued to fluidize the magnetic base particles and the fine resin particles until the fine resin particles adhered to the magnetic base particles are softened to form a film. | 12-02-2010 |
| 20110053074 | CAPSULE TONER AND METHOD OF MANUFACTURING THE SAME - A capsule toner that a blocking resistance is improved without harming a low temperature fixation property, and a method of manufacturing the same are provided. A capsule toner includes a toner base particle containing a binder resin and a colorant, and a resin coating layer containing a crystalline polyester resin and an amorphous resin, the resin coating layer coating a surface of the toner base particle. | 03-03-2011 |
| 20110059394 | CAPSULE TONER, METHOD OF MANUFACTURING THE SAME, AND TWO-COMPONENT DEVELOPER - There are provided a capsule toner, a two-component developer, and a capsule toner manufacturing method. The capsule toner in which a resin coating layer made of fine release-agent particles and fine resin particles is made on the surfaces of toner base particles, and thus excellent offset resistance without impairing blocking resistance can be obtained. The capsule toner includes toner base particles containing a binder resin and a colorant, and a resin coating layer made of fine release-agent particles and fine resin particles, for covering the surfaces of the toner base particles. The fine release-agent particles are dispersed in the resin coating layer. | 03-10-2011 |
| 20110069992 | METHOD OF MANUFACTURING TONER PARTICLES, TONER PARTICLES, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A method of manufacturing toner particles capable of decreasing the manufacturing costs by simplifying the manufacturing apparatus and by decreasing the number of the steps, as well as to provide toner particles, a two-component developer, a developing apparatus and an image forming apparatus are provided. A high-pressure homogenizer is constituted by a tank, a feed pump, a high-pressure pump, a heat exchanger, a nozzle, a first depressurizing module, a cooling unit, a second depressurizing module and a take-out port arranged in this order. A flow path constituted in the first depressurizing module has a straight portion tilted with respect to a direction in which the aqueous slurry passes and a portion for relaxing the flow of the aqueous slurry. | 03-24-2011 |
| 20110070541 | CAPSULE TONER AND METHOD OF MANUFACTURING CAPSULE TONER - A capsule toner achieving both low temperature fixability and hot offset resistance, and a method of manufacturing the capsule toner are provided. A capsule toner includes a toner base particle containing a binder resin and a colorant, and a resin coating layer formed on a surface of the toner base particle. The resin coating layer includes a film of plural fine resin particles having different complex viscosities. The plural fine resin particles include first fine resin particles having complex viscosity at a softening temperature of the toner base particles of 5.0×10 | 03-24-2011 |
| 20110111338 | TONER MANUFACTURING METHOD - A toner manufacturing method is provided. The toner manufacturing method includes a step of adhering fine resin particles whose volume average particle size is 5% or more and 17% or less of a volume average particle size of toner base particles, to surfaces of the toner base particles; and a step of plasticizing the toner base particles and the fine resin particles by adding mechanical impact thereto while spraying lower alcohol, and fusing the fine resin particles to the surfaces of the toner base particles to form a plurality of projections of the fine resin particles, on the surfaces of the toner base particles. Surface coverage of the surfaces of the toner base particles with the projections is 10% or more and 50% or less. | 05-12-2011 |
