Class / Patent application number | Description | Number of patent applications / Date published |
430110400 | Having specified toner particle size distribution | 17 |
20080227018 | TONER FOR DEVELOPING A LATENT ELECTROSTATIC IMAGE, AND IMAGE FORMING METHOD AND APPARATUS USING THE TONER - To provide a toner containing toner particles, wherein each toner particle contains at least: a releasing agent having an average dispersed particle diameter of 0.1 to 0.5 μm; and a modified layered inorganic mineral in which at least a part of ions present in between layers of a layered inorganic mineral is replaced with an organic ion, wherein the toner has a ratio A/B of 0.2 to 2.0 where A denotes the average dispersed particle diameter of the releasing agent and B denotes an average dispersed particle diameter of the modified layered inorganic mineral, or a proportion of the dispersed particles of the releasing agent having a diameter of 1 μm or more in the dispersed particles of the releasing agent having a diameter of 0.5 μm or more is 20% by number or less. | 09-18-2008 |
20080241727 | METHOD AND APPARATUS FOR MANUFACTURING TONER, AND ELECTROPHOTOGRAPHIC TONER MANUFACTURED BY THE METHOD - A method for manufacturing toner includes steps of supplying, periodically dispensing, and solidifying. The supply step supplies a liquid to be atomized, which includes at least a resin and a colorant. The periodic dispensation step periodically dispenses droplets of the liquid through an atomizing unit. The solidification step solidifies the dispensed droplets into toner particles. The atomizing unit includes a thin film, a vibration actuator, and multiple holes. The thin film has a relatively stiff portion and a relatively elastic portion, and is configured to contact the liquid. The vibration actuator is connected to and supports a periphery of the thin film, and is configured to induce vibration of the thin film. The multiple holes are formed in the relatively stiff portion, and are configured to discharge droplets therethrough when the thin film vibrates. | 10-02-2008 |
20080286679 | TONER PREPARATION METHOD AND APPARATUS, AND TONER PREPARED THEREBY - 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. | 11-20-2008 |
20080286680 | METHOD AND APPARATUS FOR MANUFACTURING TONER AND TONER MANUFACTURED BY THE APPARATUS AND METHOD - A method for manufacturing a toner, including periodically forming liquid droplets of a toner constituent liquid comprising a resin and a colorant by vibrating a thin film having a plurality of holes provided on a retention part thereof to discharge the liquid droplets of the toner constituent liquid from the plurality of holes and forming toner particles by solidifying the liquid droplets discharged from the plurality of holes. In periodically forming the liquid droplets of the toner constituent liquid, a flow of gas in a direction of discharge of the liquid droplets is formed by a gas flow generation unit provided downstream from the thin film relative to the direction of discharge of the liquid droplets, including a tapered part forming an aperture corresponding to a hole formation area of the thin film. | 11-20-2008 |
20090004591 | ELECTROSTATIC IMAGE DEVELOPING TONER AND METHOD FOR PRODUCING THE SAME - Disclosed is a toner for developing electrostatic image containing toner particles prepared with a method containing a step of: coagulating resin particle A, resin particle B and a colorant, wherein resin particle A and resin particle B respectively have volume average particle diameters D | 01-01-2009 |
20090226837 | TONER MANUFACTURING METHOD, TONER MANUFACTURING APPARATUS, AND TONER MANUFACTURED BY WAY OF THE TONER MANUFACTURING METHOD THEREOF - A method of manufacturing a toner includes preparing a droplet forming device, comprising a storage portion to store a toner composition solution, a thin film formed from a rigid material, bonded to the storage portion by a bonding material, and provided with a nozzle and an oscillation device including an oscillation generation device configured to generate an oscillation upon the thin film and an oscillation amplification device which has an oscillation surface including a position that is parallel and opposite to the thin film and is configured to amplify the oscillation, periodically forming a droplet of the toner composition solution including at least a resin and a coloring agent to be supplied between the thin film and the oscillation surface and discharging the droplet via the nozzle, and solidifying the droplet of the toner composition solution discharged via the nozzle, and forming a toner particle. | 09-10-2009 |
20090291384 | METHOD OF MANUFACTURING TONER, APPARATUS OF MANUFACTURING A TONER, A TONER, AN IMAGE FORMING METHOD AND AN IMAGE FORMING APPARATUS - A method of manufacturing a toner including a first dispersing wherein (i) at least two binder resins having different weight average molecular weight, (ii) a coloring agent and (iii) a releasing agent are dispersed in an organic solvent to obtain an oil phase, a second dispersing comprising continuously mixing the oil phase with an aqueous medium comprising a solid particulate dispersion agent to form a dispersion emulsion comprising emulsification particles (where at least one of the first and the second dispersing is carried out under at least one condition based on a property of the binder resin which has the lowest weight-average molecular weight), measuring automatically the volume average particle diameter of the dispersion emulsion during the second dispersing, calculating automatically a difference between the volume average particle diameter of the dispersion emulsion measured during the measuring and a target volume average particle diameter, maintaining automatically an allowable difference between the volume average particle diameter of the dispersion emulsion measured during the measuring and the target volume average particle diameter by changing one of the conditions. | 11-26-2009 |
20100003613 | TONER, METHOD OF PRODUCING TONER, AND IMAGE FORMING METHOD - 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. | 01-07-2010 |
20100151378 | TONER - Disclosed is toner in which is used in an image formation process comprising the steps of transferring an image of toner formed on a photoreceptor onto a recording sheet, and removing any residual toner remaining on any of the photoreceptor, an intermediate transfer member and a secondary transfer member with a cleaning blade, the toner containing at least toner particles (A) and small particles (B), wherein the toner particles (A) have an average circularity of from 0.93 to 0.99 and a number-based median diameter (D | 06-17-2010 |
20100227267 | METHOD FOR PRODUCING TONER AND TONER - 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. | 09-09-2010 |
20100273103 | MAGNETIC CARRIER AND TWO-COMPONENTS DEVELOPER - The present invention provides an image of high image quality by using a magnetic carrier coated with a novel coating resin composition. Further, the present invention stably provides a good image which is hardly influenced by environmental fluctuation and long-term use and has a superior stability of a charging amount when left to stand especially under high temperature and high humidity environments. The present invention also provides a magnetic carrier characterized in that a carrier core surface is coated with a copolymer containing at least, as copolymerization components, an acrylic monomer having a specific structure and an acrylic macromonomer having a specific structure. | 10-28-2010 |
20110027715 | DEVELOPER, IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - A developer for forming an image on a transfer medium includes a toner having a volume average particle size of 3 to 8 μm, and a mixed carrier including a first carrier having a volume average particle size of 25 to 40 μm and conductivity that corresponds to a current value of 1.5 to 2.0 μA at application of 1000 V for 30 sec, and a second carrier having a volume average particle size of 35 to 60 μm larger than the first carrier and conductivity that corresponds to a current value of 2.0 to 4.0 μA larger than the first carrier at application of 1000 V for 30 sec. | 02-03-2011 |
20110217648 | TONER COMPOSITIONS AND METHODS - Emulsion aggregation toner particles including a resin, polysaccharide particles, an optional wax, and an optional colorant. The toner particles contain about 1 to about 50 wt % polysaccharide particles based on the total weight of the toner particles. | 09-08-2011 |
20110281214 | DEVELOPING AGENT - According to one embodiment, there is provided, a developing agent including a toner containing a toner particle containing a coloring agent, an amorphous polyester, a crystalline polyester having an endothermic peak temperature T | 11-17-2011 |
20120328979 | TONER AND PROCESS FOR PRODUCING TONER - A toner is provided which has toner particles and an inorganic fine powder; the toner particles being obtained by suspension polymerization using a specific polar resin. The toner is a toner in which; where, in displacement levels found in a micro-compression test in which a force is applied to a toner single particle at a loading rate of 9.8×10 | 12-27-2012 |
20130260309 | TONER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT - A toner containing a binder resin, a release agent, and pigment fine particles is produced by aggregating fine particles containing the components of the toner to obtain fine particle aggregates and then coalescing the fine particle aggregates. The pigment fine particles have an average primary particle diameter of 50 nm or less, a Cv value of less than 20%, and an average circularity of 0.900 or more. | 10-03-2013 |
20160147167 | TONER AND TONER PRODUCING METHOD, AND DEVELOPER - Provided is a toner obtained by granulating a toner composition in a hydrophobic medium and then drying the granulated product. The toner contains a binder resin. The binder resin includes 2 or more kinds of binder resins having different contact angles (to water). The binder resin having the largest contact angle has a weight average molecular weight of 15,000 or less. The other binder resins have a weight average molecular weight of greater than 15,000. | 05-26-2016 |