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Dry development

Subclass of:

399 - Electrophotography

399130000 - IMAGE FORMATION

399222000 - Development

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
399265000 Application member 501
399258000 Supplying new toner 483
399254000 Mixing 224
399264000 Removing excess developer 23
399257000 Purging 11
399289000 Having field curtain 3
20100074657Developer Carrying Device and Image Forming Device - A developer carrying device is provided with a group of carrying electrodes configured to form a traveling wave field as voltages are sequentially applied thereto, charged developer being carried by an effect of the traveling wave field, a developer carrying member having a surface on which the group of carrying electrodes are arranged, and a plurality of leveling electrodes provided above the surface and configured to form electric fields in a direction substantially along the surface, the plurality of leveling electrodes being needle like electrodes extending in a direction intersecting with the surface, the plurality of leveling electrodes being spaced from each other in a direction along the surface and intersecting with a direction in which the developer is carried.03-25-2010
20090136269Developer Electric Field Conveyer, Developer Feeder, and Image Forming Apparatus - A developing apparatus 05-28-2009
20100172676IMAGE FORMING APPARATUS - An image forming apparatus includes a photosensitive drum to which an electrostatic image is formed and a developing sleeve carrying a developer including toner carrier. An alternating voltage is applied to the sleeve to form an alternating electric field between the sleeve and the drum to develop the electrostatic image with the developer. A relation |K07-08-2010
399253000 Conditioning of toner 2
20120014718DEVELOPING DEVICE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - According to one embodiment, a developing device includes: a developing roller configured to supply a developer to a photoconductive drum; a first mixer configured to mix a fresh toner supplied from a toner supply section and the developer; a second mixer configured to supply the developer mixed by the first mixer to the developing roller; and a magnet roller including a magnet on an inside thereof and configured to remove foreign matters from the developer collected.01-19-2012
20110103842DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes a developing tank for containing a powder developer, an agitating member disposed in the developing tank to agitate the powder developer; and a cooling tank attached to the developing tank. The cooling tank contains an endothermic material to absorb heat from the powder developer.05-05-2011
399292000 Fluidized bed 1
20090010685Transferring Method of Powder Toner for Electrophotograph and Transferring Apparatus Thereof, and Filling Method of Powder Toner and the Filling Apparatus Thereof - A powder toner transferring method that fluidizes a powder toner with a gas supplied from an air supply, sucks the fluidized powder toner with a suction, and transfers the powder toner by discharging the powder toner in a toner storage container. The suction of the powder toner is performed with a reciprocating-motion pump. A powder toner filling method includes the powder toner transferring process.01-08-2009
Entries
DocumentTitleDate
20090196658TONER, DEVELOPER, IMAGE FORMING METHOD, IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - A toner having a weight-average particle diameter of from 2 to 7 μm and a circularity of from 0.95 to 1.00, including a colorant; a binder resin; and at least one oxidized particulate material, comprising a silicon element, wherein the oxidized particulate material has a number-average particle diameter (Dn) of from 30 to 80 nm; a standard deviation rate of the particle diameter distribution (the standard deviation/Dn×100) of from 0 to 10%; a shape factor SF1 of from 100 to 130; a standard deviation rate of the SF1 (the standard deviation/SF1×100) of from 0 to 10%; a shape factor SF2 of from 100 to 125; and a standard deviation rate of the SF2 (the standard deviation/SF2×100) of from 0 to 10%.08-06-2009
20090190959DEVELOPER AND IMAGE FORMING APPARATUS - A developer including a toner containing the cylindrical toner particles obtained by melting toner raw materials including binder resins, pigments, and waxes, forming a fibrous intermediate from the melted toner raw materials and cutting the fibrous intermediate, wherein the cylindrical toner particles have a ratio (L/D) of the cylindrical length (L) to the cylindrical cross-sectional diameter (D) of 0.1 to 0.9.07-30-2009
20090047043IMAGE-FORMING METHOD, MAGNETIC TONER, AND PROCESS UNIT - An image-forming method is provided which can provide stable image density irrespective of use environments and does not cause image defects such as fogging, tailing, or transfer voids, even when being applied to a developing sleeve with a reduced diameter. In the image-forming method, a latent image bearing member and a toner bearing member bearing a magnetic toner on its surface and having inside a unit for generating a magnetic field are placed with a predetermined interval, and an alternating field is applied between the latent image bearing member and the toner bearing member, and an electrostatic latent image borne by the latent image bearing member is developed with the magnetic toner. The toner bearing member has a specific diameter, and the magnetic toner has a specific circularity and a specific compressibility. The total energy of the toner measured with a powder flowability measuring apparatus satisfies a specific value.02-19-2009
20100111570METHOD FOR FORMING IMAGE AND IMAGE FORMING APPARATUS HAVING A DEVELOPING AGENT WITH A DISTRIBUTION OF ADHESIVE FORCE TO A SURFACE OF AN IMAGE CARRIER - The developing agent is selected to have a distribution of adhesive force to the surface of an image carrier, which is configured such that the ratio of the developing agent having an adhesive force which is not less than 2.5 times as high as an average value of a distribution of adhesive force is 3% by weight or less based on an entire weight of the developing agent.05-06-2010
20100104324METHOD FOR MANUFACTURING RESIN-LAYER COATED TONER, RESIN-LAYER COATED TONER, DEVELOPER, DEVELOPING APPARATUS AND IMAGE FORMING APPARATUS - A method for manufacturing a resin-layer coated toner is provided. The method for manufacturing the resin-layer coated toner uses a rotary stirring apparatus including a circulating section, a temperature regulation section, a spraying section and an exhausting section, sprays a liquid substance to particles of toner materials and particles of coating materials in a fluidized state to plasticize such particles from a spraying section by carrier gas and gasifies the liquid, circulates the carrier gas in the powder passage and continuously exhausts the carrier gas including the gasified substance through the exhausting section to the outside of the powder passage, and pressure P04-29-2010
20100104323TONER, 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
20090297224METHOD 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
20090232557TONER, 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 SF09-17-2009
20090010682DECORATING WITH POWDER MATERIAL - A method for applying a pattern (01-08-2009
20130164038DEVELOPING MEMBER AND PRODUCTION METHOD THEREFOR, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - Provided is a developing member capable of suppressing occurrence of compression set. The developing member comprises a substrate; an elastic layer provided on the substrate; and a coating layer provided on the elastic layer, wherein the elastic layer contains a cured substance of a mixture containing the following (A) to (D): (A) organopolysiloxane having two or more vinyl groups bonded to a silicon atom in one molecule and having a viscosity at 25° C. of 10 Pa·s or more and 100 Pa·s or less; (B) organopolysiloxane including constituent units of SiO06-27-2013
20120237267ELECTROSTATIC IMAGE DEVELOPING TONER, DEVELOPER, AND IMAGE FORMING APPARATUS - An electrostatic image developing toner including: toner particles each containing binder resin and colorant; and an external additive supported on the toner particles, wherein the toner particles each have protrusions on surface thereof, average of lengths of long sides of the protrusions is 0.10 μm or more but less than 0.50 μm, standard deviation of the lengths of the long sides of the protrusions is 0.20 or less, coverage rate of the protrusions on the surface of each toner particle is 30% to 90%, the external additive includes at least two different particles including external additive (A) and one or more external additives (B), external additive (A) has longest average primary particle diameter among the external additives and charged to have the opposite polarity to the toner particles, and at least one of the external additives (B) is charged to have the same polarity as the toner particles.09-20-2012
20100021210METHOD OF MANUFACTURING COALESCED RESIN PARTICLES, COALESCED RESIN PARTICLES, TONER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - There is provided a method of manufacturing coalesced resin particles for obtaining coalesced resin particles by coalescing aggregated resin particles in a grain boundary-free state in a short period of time while keeping a grain size distribution within a narrow range. In a coalescence process, a slurry of aggregated resin particles is flowed through an inside of a pipe under predetermined heating and pressurizing conditions. In a before-cooling decompression process, a slurry of coalesced resin particles flowing through the inside of the pipe in a heat and pressure-applied state is subjected to pressure reduction before it is cooled down to a predetermined temperature in a cooling process. Then, in a decompression process, a coalesced resin particle slurry that has been cooled in the cooling process while being flowed through the inside of the pipe is decompressed to an atmospheric pressure.01-28-2010
20100209145CAPSULE 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
20100124441TONER AND METHOD OF MANUFACTURING THE SAME, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A toner containing a lignin resin, a carbon-neutral biomass polymer having a low environmental load and taking global environmental protection into account, as a constitutional component of a binder resin, and having a wide fixing non-offset range and an excellent fixing property, is provided. The toner contains at least a binder resin, a colorant, and a release agent. Furthermore, in the toner, the binder resin includes a resin A that is a lignin resin and a resin B that is another resin component, and the resin B has a peak top molecular weight of 1005-20-2010
20090148191COLOR TONER, DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - A color toner, a developer, a developing device for performing development by using the developer and an image forming apparatus having the developing device are provided. A developer, which contains a color toner formed by adding zinc oxide particles externally to the surfaces of toner base particles containing binder resin and colorant, in which the average primary particle size of zinc oxide particles falls in a range of 10 nm or more and 50 nm or less, the average particle size of primary-particle aggregates of zinc oxide particles is 0.3 μm or less and the zinc oxide particle is made of zinc oxide doped with aluminum, is charged in a developer tank of a developing device of an image forming apparatus for image formation.06-11-2009
20100080629METHOD FOR MANUFACTURING TONER, TONER, DEVELOPER, DEVELOPING APPARATUS, AND IMAGE FORMING APPARATUS - A method for manufacturing a toner is provided. In a fine resin particle adhering step S04-01-2010
20110268477DEVELOPER CARRYING MEMBER, METHOD FOR MANUFACTURING SAME AND DEVELOPING APPARATUS - The present invention provides a developer carrying member capable of maintaining excellent charge imparting property even under long-term use. The present invention relates to a developer carrying member including a substrate and a resin layer, wherein the resin layer includes an acrylic resin having three specific structural units and electroconductive particles.11-03-2011
20090103950TONER, IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND PROCESS CARTRIDGE - An image forming apparatus including: a latent electrostatic image bearing member, a charging unit, an exposing unit, a developing unit, a transfer unit, and a fixing unit, wherein the toner contains at least a binder resin and a colorant, the binder resin contains a polyester resin obtained by polycondensation of an alcohol component with a carboxylic acid component containing a rosin compound, the amount of the rosin compound contained in the carboxylic acid component is 5% by mass or more based on the total mass of the alcohol component and carboxylic acid component, and the amount of an abietic acid contained in the toner is 1% by mass or less.04-23-2009
20090297225TONER, DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - A toner whose flowability, chargeability and fixing property are enhanced, a developer, a developing device and an image forming apparatus are provided. The toner comprises a toner particle in which a shell layer is formed on a surface of a core particle, and external additive, where (1) the shell layer is formed in a film on the surface of the core particle, (2) a shape factor SF-2 is 120 or more and 140 or less, and (3) a BET specific surface area measured by the BET method is 1.2 m12-03-2009
20100061767METHOD 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. The rotary stirring apparatus includes at least a circulation section, a temperature regulation section and a spraying section composed of a two-fluid nozzle. The two-fluid nozzle includes a liquid pipe and an air pipe, the liquid pipe is inserted in the air pipe such that an axis of the liquid pipe coincides with an axis of the air pipe, and at least a part of the liquid pipe and the air pipe is fixed such that the centers of those pipes do not move. A substance in liquid form is sprayed in constant rate from the two-fluid nozzle while regulating temperature and circulating the toner base particles and the fine resin particles in a powder passage, thereby forming a film on the surface of the toner base particle.03-11-2010
20080279591One-component toner and image forming method - The present invention is to provide a nonmagnetic one-component toner containing a colorant, and a binder resin, wherein metal oxide fine particles are fixed on a toner surface with an adhesion strength of 95% to 99%, the toner has a direct current resistance of 1E7 Ω·cm to 1E9 Ω·cm, and an electrostatic capacity of 1.0E-12F to 1.5E-11F.11-13-2008
20080292361TONER USED FOR IMAGE FORMING APPARATUS - The present invention provides an image forming apparatus capable of stably producing high quality images with time, without causing missing a central part of a thin line, however, with keeping an appropriate flowability of a toner. The toner used in the image forming apparatus is a toner which contains a binder resin, a colorant, and a laminar inorganic mineral in which at least part of an ion in layers is modified with an organic ion, the toner is granulated in an aqueous system, the volume average particle diameter Dv of the toner is in the range of 3.0 μm11-27-2008
20100142999TONER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE, FIXING DEVICE, AND IMAGE FORMING APPARATUS - The present invention realizes: a toner that ensures fixing property only by a laser fixing system where a toner is fixed by irradiation of laser light whose wavelength is adjusted to be in an absorption wavelength range of each color of the toner, and realizes an image without poor color reproducibility caused by an infrared absorbent; a two-component developer containing the toner; a developing device; a fixing device; and an image forming apparatus. A capsule toner, which is the toner of the present invention, is arranged such that the capsule toner has a two-layer structure where a coating layer is formed around a surface of a core particle serving as a toner matrix particle, and nb/na is in a range of 0.92 to 0.96 where nb/na is a ratio of a refractive index of a resin making up the coating layer (nb) to a refractive index of a resin making up the core particle (na).06-10-2010
20090003884DEVELOPING APPARATUS AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A developing apparatus, including: a developing container which has an opening portion and contains a developer; a developer carrying member which carries the developer at the opening portion; and a rotatable developer supplying member which is in contact with the developer carrying member and has a surface of a foam layer, for supplying the developer to the developer carrying member, the developer supplying member detecting a capacitance between the developer carrying member and the developer supplying member, wherein a surface aeration amount L (liter/min.) of the developer supplying member satisfies 1.8≦L.01-01-2009
20080232857IMAGE FORMING APPARATUS - An image forming apparatus having at least a latent electrostatic image bearing member, and a recharging unit configured to recharge a residual toner remaining on the latent electrostatic image bearing member, wherein after transfer, the residual toner is passed through the recharging unit and is then recovered in a developing device; a charging component of the recharging unit that comes into contact with the latent electrostatic image bearing member is a polymer sheet having a surface roughness (Ra) of 0.12 μm to 0.51 μm; the toner contains at least a pigment, a binder resin, and a releasing agent, and contains inorganic fine particles as an external additive, and the amount of the inorganic fine particles and the amount of the releasing agent satisfy three specific Expressions.09-25-2008
20090245876ELECTROPHOTOGRAPHIC TONER AND IMAGE FORMING APPARATUS - According to an embodiment of the invention, an electrophotographic toner contains 100 parts by weight of a toner resin, from 0.01 to 10 parts by weight of a cyclodextrin compound, first silica having an average particle diameter of from 20 to 40 nm, and second silica having an average particle diameter of from 8 to 14 nm.10-01-2009
20100183340RESIN COATED CARRIER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A resin coated carrier is provided that can stably charge a toner having added thereto an external additive having a large particle size over a long period of time and can prevent blocking of a developer. The resin coated carrier satisfies the following formula (1):07-22-2010
20100189468DEVELOPING DEVICE AND IMAGE FORMING DEVICE - A developing device includes a developing member for developing an electrostatic latent image by adhering developer on an image carrier; a feeding member for feeding the developer to the developing member; and an interposing member that is interposed between the developing member and the feeding member during a period of when the developing device is not being used.07-29-2010
20090041505IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, TONER AND PROCESS CARTRIDGE - An image forming apparatus, including an image bearing member, a charging device, an irradiating device, a developing device, a cleaning device, a transfer device, and a fixing device. The fixing device includes an endless belt having an elastic layer, a plurality of rotation bodies located inside the endless belt, and a pressing rotation body located outside the endless belt. The pressing rotation body forms a nip portion with the endless belt while sandwiching the endless belt with one of the plurality of the rotation bodies to fix the toner image on the recording material. The nipping time is from 35 to 70 ms, at least one of the pressing rotation body and the rotation body has an elastic layer having a rubber hardness of from 20 to 40 Hs, and the toner has a weight average particle diameter of from 2 to 5 μm.02-12-2009
20090074466DEVELOPING UNIT AND IMAGE FORMING APPARATUS HAVING THE SAME - A developing unit capable of dispersing a pressure of developer used therein includes a developer housing to contain the developer and a blocking member to divide the developer housing into a first section and a second section, the second section including a developing member disposed therein to transfer the developer onto a photosensitive medium and to store the developer, the blocking member being detachably mounted in the developing unit. When the blocking member is detached from the developing unit, the first section is connected to the second section, so that the pressure of developer inside the developer housing can be spread evenly.03-19-2009
20100303506METHOD 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
20090074467IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus including an image bearing member to bear a latent electrostatic image, a charging device to charge the image bearing member, an irradiating device to irradiate the image bearing member with light to form the latent electrostatic image, a developing device to develop the latent electrostatic image with toner to form a visualized image, a transfer device to transfer the visualized image to a recording medium, a lubricant application device to apply a lubricant to the surface of the image bearing member, a cleaning device to clean the surface of the image bearing member, wherein the toner has a ratio A of from 0.3 to 1.7 obtained by the following Relationship (1), particulates P comprising resin particulates and inorganic particulates are added to the toner and the resin particulates P1 have an average primary particle diameter of from 60 to 600 nm, ratio A=Mother toner BET specific surface area/Mother toner volume average particle diameter Relationship (1).03-19-2009
20110033207TONER USING RESIN BEING INSOLUBLE IN ORGANIC SOLVENTS AND METHOD FOR PREPARING THE SAME - A toner using an organic solvent-insoluble resin and a method of preparing the same. The toner includes: a binder resin that comprises an organic solvent-insoluble resin and an acid group-containing resin, a coloring agent, and at least one additive, wherein the organic solvent-insoluble resin is a crosslinked polyester resin or a cyclic olefin co-polymer (COC) resin, and the ratio of the organic solvent-insoluble resin to the acid group-containing resin is in the range of 5:95 to 40:60 on a weight basis. The toner can be applied to an electrophotographic imaging apparatus.02-10-2011
20090214264TONER, METHOD OF MANUFACTURING TONER, DEVELOPER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - A toner, a developer, a two-component developer, a developing device and an image forming apparatus are provided. In the image forming apparatus, images are formed with a developer that fills a developing tank of the developing device. The developer includes the toner containing at least a binder resin, a colorant, and a release agent, the release agent having an acid value of less than 4 mgKOH/g and in which an amount of the release agent exposed on a surface of toner is 0.5% by weight or more and 2.5% by weight or less of a total amount of the toner.08-27-2009
20110243612IMAGE FORMING APPARATUS CAPABLE OF EFFECTIVELY DEVELOPING IMAGES - An image forming apparatus, a process cartridge, and a developing unit includes a developer carrying member to carry developer, first and second rotary members arranged in parallel to each other and configured to rotate to agitate and convey the developer, and an enclosure having an inside space to contain the developer, the inside space being divided by a partition with communication openings formed therein at opposite ends thereof into a first chamber configured to maintain the developer above a first level and to hold the first rotary member therein which supplies the developer to the developer carrying member while agitating and conveying the developer, and a second chamber configured to communicate with the first chamber through the communication openings, to maintain the developer at a second level lower than the first level, and to hold the second rotary member therein which circulates the developer with the first chamber through the communication openings.10-06-2011
20100202801DEVELOPER CARRYING MEMBER AND DEVELOPING APPARATUS - A developer carrying member is disclosed which can stably provide toners with triboelectric charges even in various environments. The developer carrying member has a substrate and a resin layer as a surface layer formed on the surface of the substrate, and the resin layer contains a thermosetting resin as a binder resin, an acrylic resin having two units having specific structures, and conductive particles.08-12-2010
20100098462METHOD OF PREPARING TONER USING MICRO-SUSPENSION PARTICLES AND TONER PREPARED USING THE METHOD DIGITAL IMAGE DATA - A method of preparing a toner using a micro-suspension particle, includes preparing a mixture by mixing a resin having acidic groups, a master batch of coloring pigment, and at least one additive with an organic solvent, and then neutralizing the acid groups of the resin with a base; forming a micro-suspension by adding the prepared mixture to a dispersion medium; and forming a toner composition by removing the organic solvent from the prepared micro-suspension. Therefore, the method of preparing a toner using the disclosed micro-suspension particle and a toner prepared using the same can save manufacturing costs, and can improve charging ability and cleaning properties of the toner.04-22-2010
20090003885TONER, DEVELOPER, AND IMAGE FORMING APPARATUS - A toner including a colorant and a binder resin is provided. The binder resin includes a first resin comprising a block X comprising a resin comprising a racemic mixture of optically active monomers of a D-form compound and an L-form compound, and a block Y comprising another resin. The weight ratio of the D-form compound to the L-form compound is from 48/52 to 52/48, and the weight ratio of the block Y to the block X is from 1/3 to 3/1. The toner is obtained by dispersing or emulsifying a toner constituent liquid, in which the colorant and the binder resin are dissolved or dispersed in an organic solvent, in an aqueous medium.01-01-2009
20110164901TONER AND METHOD FOR PRODUCING THE SAME - A toner containing core particles each containing at least a resin A having a polyester skeleton and a colorant; and vinyl resin fine particles each of which encapsulates a resin B having at least a polyester skeleton and an endothermic peak measured by differential scanning calorimeter (DSC) at 40° C. to 110° C., wherein the vinyl resin fine particles are attached onto each of the core particles.07-07-2011
20110069992METHOD 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
20110176835TONER BEARING MEMBER, DEVELOPMENT DEVICE, AND IMAGE FORMING APPARATUS - A toner bearing member having an electroconductive substrate, an insulation layer formed on the electroconductive substrate, multiple electrodes spaced a constant distance apart therebetween, formed on the insulation layer, and a surface layer that covers the multiple electrodes, the surface layer comprising a polymerizable material comprising a structure unit represented by the following chemical structure 1 and at least one of cyclohexanone and cyclopentanone,07-21-2011
20090175658IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND PROCESS CARTRIDGE - To provide an image forming apparatus including: a latent electrostatic image bearing member; a charging unit configured to charge the surface of the latent electrostatic image bearing member; an exposing unit configured to expose the charged surface of the latent electrostatic image to form a latent electrostatic image thereon; a developing unit configured to develop the latent electrostatic image with a toner to form a visualized image; a transferring unit configured to transfer the visualized image onto a recording medium; and a fixing unit configured to fix the visualized image transferred onto the recording medium, wherein the toner includes a binder resin and a coloring agent, and the binder resin includes a polyester resin obtained by condensation polymerization of an alcohol component and a carboxylic acid component containing a (meth)acrylic acid modified rosin.07-09-2009
20100021209TONER, DEVELOPER, AND IMAGE FORMING APPARATUS - 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.01-28-2010
20110116841TONER HAVING MULTIPLE INFLECTION POINTS ON STORAGE MODULUS CURVE WITH RESPECT TO TEMPERATURE AND METHOD OF PREPARING THE SAME - Provided are a toner and a method of preparing the same. The toner includes a binder resin, a coloring agent, and at least one additive, and a storage modulus curve of the toner with respect to temperature has multiple inflection points. The toner may be used in an electrophotographic image forming apparatus.05-19-2011
20110103841Developer, developer cartridge, developing unit, and image forming apparatus - A developer contains a resin, a coloring agent, and an external additive in an amount of 2.5 to 4.5 weight parts added to the resin in an amount of 100 weight parts resin. The developer has an average volume mean particle diameter in the range of 4.5 to 6.5 μm and a BET specific surface in the range of 2.45 to 3.74 m05-05-2011
20100232837TONER HAVING CORE-SHELL STRUCTURE AND METHOD OF PREPARING THE SAME - A toner has a core-shell structure including a toner core portion having a resin with an active hydrogenactive hydrogen containing group, a colorant and at least one additive, and a toner shell portion surrounding the toner core portion, wherein the toner shell portion includes a cross-linked resin prepared by reaction of at least a portion of the active hydrogen containing group and the cross-linking agent.09-16-2010
20120087698DEVELOPER, DEVELOPMENT DEVICE, AND IMAGE FORMATION APPARATUS - A developer includes a binder resin, a carbon black, and a black charge control agent. When an amount of the binder resin is 100 parts by weight, a blending quantity of the carbon black is set in a range of 3.0 to 7.0 parts by weight, both inclusive, and a blending quantity of the black charge control agent is set in a range of 0.3 to 1.2 parts by weight, both inclusive.04-12-2012
20130022371TONER FOR ELECTROSTATIC CHARGE DEVELOPMENT - To provide a toner, which contains a binder resin, a colorant, and a releasing agent, wherein the binder resin contains a low molecular weight resin component, where the low molecular weight resin component has a resin softening coefficient (A), represented by the following formula (1), satisfying A>0.165, and has storage elastic modulus (dyne/cm01-24-2013
20110274467DEVELOPER CARRYING MEMBER, AND DEVELOPING APPARATUS USING SAME - The present invention relates to a developer carrying member which includes a substrate and the resin layer formed on the surface of the substrate, wherein the resin layer is obtained by thermally curing the coating material composition including at least the following (A) to (E): (A) a thermosetting resin as a binder resin; (B) an alcohol as a solvent, containing 1 to 4 carbon atoms; (C) a resin including the unit represented by the following formula (1); (D) graphitized carbon black having a graphite (002) lattice spacing of 0.3370 nm or more and 0.3450 nm or less as measured by X-ray diffraction; and (E) acid carbon black having a pH of 5.0 or less:11-10-2011

Patent applications in class Dry development

Patent applications in all subclasses Dry development