Process Of Making Developer Composition Patents (Class 430/137.1)
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Publication number: 20140248559Abstract: The disclosure relates to a process for making a latex emulsion suitable for use in a toner comprising at least one amorphous polyester resin and a solvent to form a resin mixture, including that the process is carried out at room temperature using acoustic mixing.Type: ApplicationFiled: March 1, 2013Publication date: September 4, 2014Applicant: XEROX CORPORATIONInventors: Shigang Qiu, Santiago Faucher
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Publication number: 20140242511Abstract: Provided is a method for manufacturing carrier core particles for electrophotographic developer capable of stably maintaining high chargeability over a long time. The method for manufacturing carrier core particles includes a granulation step of granulating a mixture of raw materials containing manganese, iron, strontium, and calcium and a firing step of firing the mixture granulated in the granulation step. The firing step includes a heating process of heating the granular mixture with an increase in temperature to a predetermined degree and a cooling process of cooling the granular mixture, after the heating process, in an atmosphere with an oxygen concentration ranging from 5000 ppm to 20000 ppm. The molar ratio of the sum of strontium and calcium to the sum of the manganese, iron, strontium, and calcium is 0.0026 to 0.013.Type: ApplicationFiled: February 20, 2014Publication date: August 28, 2014Applicants: DOWA IP CREATION CO., LTD., DOWA ELECTRONICS MATERIALS CO., LTD.Inventors: Takeshi KAWAUCHI, SHO OGAWA, HARUKA SEKI
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Patent number: 8802345Abstract: The present disclosure provides a process for the preparation of developer compositions comprising: a first developer comprised of carrier and toner comprised of resin, pigment, polyolefin, compatibilizer, charge control agent, and metal oxide surface additive, and adding thereto a second developer comprised of carrier, and second compatibilizer, charge control agent, and metal oxide surface additive. The second developer can be directly dispensed into a developer housing.Type: GrantFiled: October 17, 2012Date of Patent: August 12, 2014Assignee: Xerox CorporationInventors: Mark James Hirsch, Kip L. Jugle, John R. Falvo
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Patent number: 8802344Abstract: A process for making toner particles is provided. In embodiments, a suitable process includes adding a washing aid agent to toner particles at the time of washing the toner particles prior to their drying and recover. The washing aid agent assist in the removal of ionic species, including surfactants and ions that are part of the emulsion aggregation process, from the resulting toner particles. Utilization of the washing aid agent produces toner particles having improved charging characteristics.Type: GrantFiled: December 13, 2010Date of Patent: August 12, 2014Assignee: Xerox CorporationInventors: Zhen Lai, Chieh-Min Cheng, Zhaoyang Ou, Christopher D. Blair
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Patent number: 8785097Abstract: Disclosed is a decolorable toner produced by aggregating dispersed fine particles of a color material containing at least a color-forming compound, a color-developing agent and a decoloring agent with dispersed fine particles containing at least a binder resin having a carboxyl group, then adding a compound having a carbodiimide group or an epoxy group reactive with the carboxyl group of the binder resin, and thereafter fusing the aggregate particles, respectively in an aqueous medium. The thus obtained decolorable toner can suppress the generation of fine powder by the release of erasable color material fine particles from the toner particles.Type: GrantFiled: June 29, 2012Date of Patent: July 22, 2014Assignee: Toshiba Tec Kabushiki KaishaInventors: Takayasu Aoki, Motonari Udo, Tsuyoshi Itou, Masahiro Ikuta, Takafumi Hara
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Patent number: 8785102Abstract: A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the toner particles are made by a process in which charge control agent is added and adhered to the particle surface through washing steps and is maintained through the drying steps. The process of the present embodiments impart desirable charging characteristics to the toner particles.Type: GrantFiled: April 23, 2012Date of Patent: July 22, 2014Assignee: Xerox CorporationInventors: Robert D. Bayley, Maura A. Sweeney, Grazyna E. Kmiecik-Lawrynowicz, Daniel W. Asarese
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Patent number: 8785101Abstract: Provided is a toner containing toner particles, each of which includes a binder resin containing a polyester as a main component, a colorant, and a wax, in which the binder resin includes a block polymer in which a segment capable of forming a crystalline structure and a segment incapable of forming a crystalline structure are bonded, the toner has a maximum endothermic peak from the binder resin, as determined by differential scanning calorimetry measurement, with a peak temperature in a specific range and with an endothermic quantity in a specific range, and the wax is an ester wax having a functionality of 3 or more.Type: GrantFiled: January 14, 2013Date of Patent: July 22, 2014Assignee: Canon Kabushiki KaishaInventors: Takaaki Kaya, Tetsuya Kinumatsu, Toshifumi Mori, Ayako Okamoto, Kenji Aoki, Shuntaro Watanabe, Atsushi Tani, Takashige Kasuya
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Publication number: 20140199625Abstract: A process for making a latex emulsion including contacting at least one amorphous polyester resin with at least two organic solvents to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, and separating the solvent from water. Further, the process is carried out above the resin Tg for making the latex, which drives the latex particle size under 100 nm, where toners made from the latex show improved charging performance.Type: ApplicationFiled: January 15, 2013Publication date: July 17, 2014Applicant: XEROX CORPORATIONInventors: Shigang Qiu, Richard PN Veregin, Kimberly D. Nosella, Santiago Faucher, Cuong Vong, Enno E. Agur
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Publication number: 20140199626Abstract: According to one embodiment, a method of manufacturing an erasable toner includes washing toner particles including therein a coloring material that is erasable by heating and a binder resin to obtain a toner cake having the amount of water of 20% by weight to 60% by weight, and drying the toner cake at 40° C. or more and at a temperature which is lower than the complete color erasing temperature of the toner particles by 30° C. or more.Type: ApplicationFiled: January 10, 2014Publication date: July 17, 2014Applicant: Toshiba Tec Kabushiki KaishaInventors: TSUYOSHI ITOU, Kazuhisa Takeda, Yasuhito Noda, Takayasu Aoki, Masahiro Ikuta, Takafumi Hara, Motonari Udo
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Publication number: 20140199621Abstract: A toner or developer is provided having toner particles which exhibit a higher glass transition temperature on their surface than the interior thereof. In one aspect, the toner particles contain a crystalline polyester resin, an amorphous polyester resin and a coloring material, in which the core of the toner particles exhibit the glass transition temperature g of from 30° C. to 45° C. and the surface of the toner particles exhibits the glass transition temperature of from 50° C. to 70° C.Type: ApplicationFiled: December 31, 2013Publication date: July 17, 2014Applicants: Toshiba Tec Kabushiki Kaisha, Kabushiki Kaisha ToshibaInventor: SATOSHI ARAKI
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Publication number: 20140199622Abstract: According to one embodiment, an erasable toner of the present embodiment includes a binder resin, an electron donating coloring agent, an electron accepting developer, and a discoloring temperature regulating agent, in which when measuring for the first time by differential thermal scanning calorimetry, an endothermic peak temperature Tg of the binder resin and an endothermic peak temperature Th of the discoloring temperature regulating agent satisfy Tg<Th and Th?Tg>25° C.Type: ApplicationFiled: January 16, 2014Publication date: July 17, 2014Applicant: TOSHIBA TEC KABUSHIKI KAISHAInventors: Takayasu AOKI, Takafumi HARA, Masahiro IKUTA, Tsuyoshi ITOU, Motonari UDO, Kazuhisa TAKEDA
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Patent number: 8778239Abstract: 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.Type: GrantFiled: August 17, 2012Date of Patent: July 15, 2014Assignee: Ricoh Company, Ltd.Inventors: Andrew Mwaniki Mulwa, Yoshihiro Norikane, Shinji Aoki, Masaru Ohgaki
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Patent number: 8765343Abstract: An electrostatic latent image developing toner contains a binder resin, a colorant, europium, and bismuth.Type: GrantFiled: February 8, 2012Date of Patent: July 1, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Yuki Takamiya, Eisuke Iwazaki, Satoshi Yoshida, Satoshi Inoue
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Patent number: 8765349Abstract: 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.Type: GrantFiled: July 25, 2012Date of Patent: July 1, 2014Assignee: Ricoh Company, Ltd.Inventors: Yoshihiro Norikane, Andrew Mwaniki Mulwa, Kiyotada Katoh, Yasutada Shitara
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Patent number: 8758973Abstract: 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.Type: GrantFiled: September 16, 2011Date of Patent: June 24, 2014Assignee: Ricoh Company, Ltd.Inventors: Keiji Makabe, Yohichiroh Watanabe, Minoru Masuda, Yasutada Shitara, Yoshihiro Norikane
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Patent number: 8758972Abstract: 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.Type: GrantFiled: July 6, 2009Date of Patent: June 24, 2014Assignee: Ricoh Company, LimitedInventors: Takahiro Honda, Yohichiroh Watanabe, Yoshihiro Norikane, Shinji Ohtani
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Publication number: 20140170551Abstract: The disclosure describes an emulsion aggregation toner process wherein aspartic acid derivatives are employed as chelating agents. Also disclosed is a process for preparing toner using aspartic acid derivatives to freeze/stop toner particle growth where coalescence occurs following acidification of the reaction mixture.Type: ApplicationFiled: December 17, 2012Publication date: June 19, 2014Applicant: XEROX CORPORATIONInventors: Ke Zhou, Kimberly D. Nosella, Jordan H. Wosnick, Karen A. Moffat, Richard PN Veregin, Santiago Faucher
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Publication number: 20140162182Abstract: An object of the present invention is to provide a magenta toner having high lightness and saturation and having spectral reflection properties having a wider color range. A magenta toner including magenta toner particles each including a binder resin and a colorant, wherein the colorant includes a compound represented by a formula (1): (wherein R1 and R2 represent an alkyl group or an alkoxyalkyl group, and at least one of R1 and R2 has not less than 7 carbon atoms.Type: ApplicationFiled: July 24, 2012Publication date: June 12, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Masao Nakano, Taichi Shintou, Yutaka Tani, Takayuki Ujifusa, Kaoru Takahashi, Satoshi Saito, Takeshi Miyazaki, Masashi Hirose
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Publication number: 20140162185Abstract: A toner containing toner particles, each of which contains a binder resin and a colorant, and silica particles, wherein the silica particles have a volume average particle diameter (Dv) of 70 nm or more and 500 nm or less, the variation coefficient of diameters of the silica particles, based on volume distribution thereof, is 23% or less, and wherein when the silica particles are heated from 105° C. to 200° C., the ratio of mass decrease is 0.60% or less.Type: ApplicationFiled: February 14, 2014Publication date: June 12, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Naotaka Ikeda, Emi Watanabe, Yuhei Terui, Taiji Katsura
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Patent number: 8748072Abstract: 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.Type: GrantFiled: June 22, 2009Date of Patent: June 10, 2014Assignee: Ricoh Company, Ltd.Inventors: Takahiro Honda, Yukio Tabata, Yohichiroh Watanabe, Kazumi Suzuki, Shinji Ohtani, Yoshihiro Norikane
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Patent number: 8741531Abstract: 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.Type: GrantFiled: April 12, 2012Date of Patent: June 3, 2014Assignee: Ricoh Company, Ltd.Inventors: Yoshihiro Norikane, Masaru Ohgaki
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Patent number: 8741534Abstract: A process and system for making a resin emulsion suitable for use in forming toner particles including a silicone free anti-foam agent to control foam during formation of a polyester dispersion.Type: GrantFiled: June 8, 2009Date of Patent: June 3, 2014Assignee: Xerox CorporationInventors: Zhaoyang Ou, Robert D. Bayley, Zhen Lai, Rashid Mahmood, David R. Kurceba, John Abate, Shigang Qiu, Chieh-Min Cheng
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Patent number: 8741519Abstract: Provided is a toner having an excellent low-temperature fixability and hot offset resistance, a broad fixing temperature latitude in low-temperature areas to high-temperature areas, and a high heat-resistant storage stability. The toner includes toner particles having a core-shell structure in which a shell phase containing a resin A is formed on a core containing a binder resin, a colorant and a wax. In measurement of resin A by a differential scanning calorimetry (DSC), the peak temperature TpA (° C.) of a maximum endothermic peak in the first temperature rise is at least 55° C. but not more than 80° C. In measurement of a viscoelasticity of resin A, the loss elastic modulus at TpA?10 (° C.) is at least 1×107 Pa but not more than 1×108 Pa. In measurement of the viscoelasticity of resin A, the loss elastic moduli at TpA (° C.), TpA+10 (° C.) and TpA+25 (° C.) satisfy specific conditions.Type: GrantFiled: January 14, 2013Date of Patent: June 3, 2014Assignee: Canon Kabushiki KaishaInventors: Shuntaro Watanabe, Kenji Aoki, Tetsuya Kinumatsu, Takaaki Kaya, Atsushi Tani, Ayako Okamoto, Toshifumi Mori, Yoshihiro Nakagawa, Takashige Kasuya
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Patent number: 8735033Abstract: A process for making emulsion aggregation (EA) toners is provided. In embodiments, the process comprises aggregating a mixture comprising a latex resin, and at least one colorant in a reactor to form aggregated toner particles, adding a shell resin to form a shell over the aggregated toner particles, coalescing the aggregated toner particles, and recovering the toner particles.Type: GrantFiled: March 29, 2012Date of Patent: May 27, 2014Assignee: Xerox CorporationInventors: Yulin Wang, Kimberly Nosella, David Kurceba, Santiago Faucher
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Publication number: 20140141371Abstract: An electrostatic image developing carrier includes a ferrite particle that contains from about 1.0% by weight to about 14.0% by weight of elemental magnesium, wherein an average distribution ratio D of the elemental magnesium in the ferrite particle is from about 1.1 to about 2.0, wherein the average distribution ratio D is defined as an average value of D? of at least 50 ferrite particles, wherein D? is defined as W1/W2, wherein W1 is a weight ratio of elemental magnesium content Mg to elemental iron content Fe, Me/Fe, in a whole cross-section of the ferrite particle, and W2 is a weight ratio of elemental magnesium content Mg to elemental iron content Fe, Me/Fe, in a square, the two opposite vertices of which are located at two points on a diameter of a circle circumscribing the cross-section, each being half a radius distant from the center of the circumscribing circle.Type: ApplicationFiled: November 26, 2013Publication date: May 22, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Yosuke TSURUMI, Rieko KATAOKA
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Patent number: 8722304Abstract: A method for forming surface decorated particles including stabilizing dispersed hydrophobic phase particles in an aqueous phase with fine inorganic particles having a relatively hydrophilic surface; and treating the stabilized dispersed hydrophobic phase particles with a hydrophobic group containing reactant to form hydrophobic groups covalently bonded to surfaces of the fine inorganic particles. In a particular embodiment, the invention provides a limited coalescence process for preparing binder polymer particles using inorganic stabilizer particles that provide a plurality of surface bonding sites and reacting such sites with a plurality of alkoxy silane moieties that contains pendant hydrophobic groups.Type: GrantFiled: July 30, 2010Date of Patent: May 13, 2014Assignee: Eastman Kodak CompanyInventors: Mridula Nair, David D. Putnam, Shari L. Eiff, Cumar Sreekumar
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Publication number: 20140127624Abstract: A process is disclosed for the preparation of developer compositions comprising: providing a first developer including carrier and a first toner comprised of resin, pigment, polyolefin, a first compatibilizer, a first charge control agent, and a first metal oxide surface additive; and, adding thereto a second developer including carrier, and a second toner, second compatibilizer, a second charge control agent, and a second metal oxide surface additive.Type: ApplicationFiled: November 6, 2012Publication date: May 8, 2014Applicant: XEROX CORPORATIONInventors: Mark J. Hirsch, Kip L. Jugle, John R. Falvo
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Patent number: 8715897Abstract: The present disclosure provides polyesters suitable for use in forming toners. In embodiments, a polyester may be subjected to phase inversion emulsification, in which charge control agents are added so that the polyester emulsion includes charge control agents therein. The resulting polyester emulsion with charge control agents may then be utilized to form toner particles.Type: GrantFiled: November 16, 2009Date of Patent: May 6, 2014Assignee: Xerox CorporationInventors: Robert D. Bayley, Yuhua Tong, Timothy L. Lincoln, Grazyna Kmiecik-Lawrynowicz, Maura A. Sweeney
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Publication number: 20140120468Abstract: A production apparatus that does not generate coalesced particles and can reduce a generation frequency of a product having a high circularity by a uniform treatment even if the throughput is increased is provided.Type: ApplicationFiled: June 11, 2012Publication date: May 1, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Yuichi Mizo, Hironori Minagawa, Takakuni Kobori, Kohji Takenaka, Takeshi Ohtsu, Junichi Hagiwara, Daisuke Ito, Kunihiko Kawakita
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Patent number: 8709697Abstract: 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.Type: GrantFiled: July 12, 2010Date of Patent: April 29, 2014Assignee: Ricoh Company, Ltd.Inventors: Yoshihiro Norikane, Yohichiroh Watanabe, Masaru Ohgaki, Shinji Aoki, Yasutada Shitara, Andrew Mwaniki Mulwa
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Publication number: 20140113229Abstract: An object of the present invention is to provide a magenta toner having high dispersibility of a colorant and good spectral characteristics. A magenta toner includes a magenta toner particle including at least a binder resin, a compound represented by the formula (1), and a colorant, wherein the colorant includes a pigment having a quinacridone skeleton: (wherein R1 and R2 each independently represent a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group.Type: ApplicationFiled: July 24, 2012Publication date: April 24, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Yutaka Tani, Masao Nakano, Takayuki Ujifusa, Taichi Shintou, Kaoru Takahashi, Satoshi Saito, Takayuki Toyoda, Takeshi Miyazaki, Masashi Hirose
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Patent number: 8703378Abstract: A method of manufacturing toner including mixing mother toner particles containing a binder resin and a coloring agent and first particles having an average primary particle diameter of from 100 nm to 1 ?m to using a mixer including a rotary shaft member, multiple stirring members provided to the surface of the shaft member, and a casing to cover the multiple stirring members, wherein the cross section of the inner periphery of the casing relative to a direction perpendicular to the rotation axis of the shaft member is circular around the rotation axis with a substantially constant distance between the inner periphery and the rotation axis. The casing covers the multiple stirring members and a cooling jacket is provided to at least part of the outer periphery of the casing. The weight ratio of the particles to the mother toner particles is from 1.5% to 10%.Type: GrantFiled: September 16, 2011Date of Patent: April 22, 2014Assignee: Ricoh Company, Ltd.Inventors: Kohsuke Satoh, Tetsuya Tanaka, Masahiro Kawamoto, Natsuko Matsushita
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Patent number: 8685612Abstract: A continuous emulsion aggregation process for the production of particles is presented including a plurality of continuous stirred-tank reactors (CSTR). The plurality of continuous stirred-tank reactors includes a first reactor and a second reactor for facilitating an aggregation process; a third reactor for facilitating a shell addition process; a fourth reactor for facilitating a freeze process; a fifth reactor for facilitating a chelating process; a sixth reactor for facilitating a ramp-up process; and a seventh reactor for facilitating a coalescence process. The reactors are sequentially assembled in a series configuration, each of the reactors cooperating with an overhead stirrer. In other embodiments, a CSTR system of the present disclosure possesses five reactors sequentially assembled in a series configuration to form toner particles.Type: GrantFiled: January 18, 2011Date of Patent: April 1, 2014Assignee: Xerox CorporationInventors: Santiago Faucher, Kimberly D. Nosella, Lai Chi So
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Patent number: 8679717Abstract: A binder resin for a toner containing a vinyl resin (A), a non-crystalline polyester resin (SN) and a saturated crystalline polyester resin (SC), in which the content of the vinyl resin (A) is equal to or more than 65 mass % and equal to or less than 95 mass %, based on the total content of 100 mass % of (A), (SN) and (SC), (A) is composed of a carboxyl group-containing vinyl resin (C), a glycidyl group-containing vinyl resin (E) and a reaction product of the vinyl resins, the ester group concentration of (SC) is equal to or more than 10.0 mmol/g and equal to or less than 13.5 mmol/g, (SN) is dispersed in an island form in (A) and (SC) is contained in the island phase of (SN), and the metal component (M) containing at least one kind selected from the group consisting of Zn, Ca, Mg, Al and Ba (excluding metal oxide) is contained at least in (SC).Type: GrantFiled: July 29, 2011Date of Patent: March 25, 2014Assignee: Mitsui Chemicals, Inc.Inventors: Hiroshi Matsuoka, Hiroyuki Takei, Linwood Blanton Muire, III
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Patent number: 8679723Abstract: 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.Type: GrantFiled: March 29, 2012Date of Patent: March 25, 2014Assignee: Ricoh Company, Ltd.Inventors: Minoru Masuda, Yasutada Shitara, Yoshihiro Norikane, Kiyotada Katoh, Satoshi Takahashi
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Patent number: 8673533Abstract: A compound that includes an aqueous dispersion, wherein the dispersion includes a thermoplastic resin and at least one stabilizing agent, and at least one selected from the group consisting of a colorant and a magnetic pigment, wherein the dispersion has an average volume diameter particle size from about 0.05 to about 10 microns is described.Type: GrantFiled: November 27, 2012Date of Patent: March 18, 2014Assignee: Dow Global Technologies LLCInventors: John Klier, Richard Dicran Varjian, Alastair Stewart Hill
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Patent number: 8673532Abstract: A method for producing dry toner particles that have similar particle size and shape characteristics as chemically produced toners. The method includes melt-mixing a toner resin with a colorant and, optionally, a wax, to form a toner; grinding the toner to form toner particles; classifying the toner particles into particles averaging 4 to 10 microns in size; blending the classified toner particles with additives in a high-speed blender; and then processing the mixture with optional additional surface additives in a conical mixer. The method produces toner particles that have high circularity and sharper particle size distribution. The surface processing of the toner particles does not affect the internal constituents of the toner particles.Type: GrantFiled: June 26, 2012Date of Patent: March 18, 2014Assignee: Xerox CorporationInventors: Paul Casalmir, Bryan L. Norcott
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Patent number: 8669036Abstract: Disclosed is a producing method of a decolorizable toner, comprising dispersing a mixed composition containing encapsulated colorant particles which are particles containing a color developable compound and a color developing agent and coated with an outer shell, a polymerizable monomer, and a release agent in an aqueous medium, and subjecting the polymerizable monomer to suspension polymerization in the aqueous medium.Type: GrantFiled: August 31, 2011Date of Patent: March 11, 2014Assignee: Toshiba Tec Kabushiki KaishaInventors: Tsuyoshi Itou, Takahito Kabai, Takayasu Aoki, Masahiro Ikuta
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Publication number: 20140065527Abstract: Method of adjusting the melt flow index of a toner is described, the method including adjusting the pH of the toner after the toner particles have been coalesced and the adjusting alters the melt flow index of the toner.Type: ApplicationFiled: August 29, 2012Publication date: March 6, 2014Applicant: XEROX CORPORATIONInventor: Daniel W. ASARESE
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Patent number: 8663888Abstract: The present invention provides a toner including: a colorant, and a binder resin, wherein the toner is fixed on a recording medium using a fixing liquid containing a softening agent for softening the toner, and wherein a weight average molecular weight of a THF soluble fraction of the toner in a molecular weight distribution measured by gel permeation chromatography (GPC) is 3,000 to 8,300; and a glass transition temperature of the toner measured by differential scanning calorimetry (DSC) is 50° C. to 70° C.Type: GrantFiled: December 20, 2010Date of Patent: March 4, 2014Assignee: Ricoh Company, Ltd.Inventors: Yasutada Shitara, Yohichiroh Watanabe, Yasuo Katano, Shinya Nakayama, Ryota Inoue, Yoshihiro Moriya, Akiyoshi Sabu, Shingo Sakashita, Yukiko Nakajima
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Patent number: 8663894Abstract: Method of adjusting the melt flow index of a toner is described, the method including adjusting the pH of the toner after the toner particles have been coalesced and the adjusting alters the melt flow index of the toner.Type: GrantFiled: August 29, 2012Date of Patent: March 4, 2014Assignee: Xerox CorporationInventor: Daniel W. Asarese
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Patent number: 8652745Abstract: The present invention provides a process for producing a colored toner having a textured surface, the process includes forming a polymer composition of at least one polymer and a colorant, where the at least one polymer has a softening temperature from about 60° C. to about 160° C.; forming an aqueous mineral suspension of at least one multivalent metal phosphate; forming a dispersion by combining the polymer composition and the aqueous mineral suspension under agitation to form a solid portion comprising dispersed particles of the polymer composition; heating the dispersion to a temperature above a glass transition temperature (Tg) of the polymer composition and increasing the pH to above 7.0; cooling the dispersion including the dispersed particles of the polymer composition to a temperature of from about 1° C. to about 89° C.; and recovering the particles.Type: GrantFiled: July 20, 2012Date of Patent: February 18, 2014Assignee: Penn Color, Inc.Inventors: Ronald W. Schuck, Charles B. Rybny, Choung Lai
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Patent number: 8652744Abstract: 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.Type: GrantFiled: May 20, 2011Date of Patent: February 18, 2014Assignee: Ricoh Company, Ltd.Inventors: Watanabe Yohichiroh, Yoshihiro Norikane, Yasutada Shitara, Keiji Makabe
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Patent number: 8653159Abstract: An apparatus for heat-treating a toner includes a raw-material supply unit configured to supply a toner treatment space with a raw-material toner, a hot-air supply unit configured to heat-treat the raw-material toner in the toner treatment space, a suction and ejection unit configured to eject hot air used for the heat treatment of the raw-material toner, and a waste-heat recovery and supply unit configured to recover heat from the hot air ejected by the suction and ejection unit and supply the hot-air supply unit with the recovered heat.Type: GrantFiled: March 2, 2012Date of Patent: February 18, 2014Assignee: Canon Kabushiki KaishaInventors: Hironori Minagawa, Yuichi Mizo, Takeshi Ootsu, Junichi Hagiwara, Daisuke Ito, Kunihiko Kawakita, Yasushi Tamura
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Patent number: 8652721Abstract: A toner is provided including a mother particle and an external additive covering the surface of the mother particle. The mother particle includes a binder resin and a release agent. The external additive includes a hydroxyapatite silica complex porous particle having a number average particle diameter of 160 nm or less.Type: GrantFiled: January 26, 2012Date of Patent: February 18, 2014Assignee: Ricoh Company, Ltd.Inventor: Masayuki Ishii
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Patent number: 8647802Abstract: To provide a toner manufacturing method including: continuously mixing an oil phase with an aqueous phase to form an emulsified liquid using an emulsifying mechanism having an emulsified liquid circulation pathway and an emulsifying device equipped with a stirring blade; forming liquid droplets from the emulsified liquid by controlling the equilibrium between atomization and integration of the liquid droplets; and feeding the liquid droplets with stirring to a series of treatments including at least desolvation, filtration, washing and drying; wherein a product T of the solid content concentration (% by mass) of the oil phase and viscosity (mPa·s) measured with a rotating viscometer at 25° C., and 6 rpm satisfies 30,000?T?50,000.Type: GrantFiled: March 6, 2008Date of Patent: February 11, 2014Assignee: Ricoh Company, Ltd.Inventors: Shinzo Higuchi, Hiroshi Takahashi
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Publication number: 20140038101Abstract: A method of producing an emissive toner composition including selecting a photoluminescent agent, a charge control agent, and one or more additives and combining the photoluminescent agent, charge control agent, and one or more additives to form an emissive toner composition that when printed to produce an image component on a substrate, the emission spectra of the image component for irradiation with a first excitation energy includes only dominant emission peaks corresponding to one or more dominant emission peaks of the photoluminescent agent. The photoluminescent agent is selected such that it emits light having one or more dominant emission peaks in a first emission spectral region when irradiated with the first excitation energy. The charge control agent and one or more additives are selected such that they do not emit light in the visible spectrum when irradiated with visible light and does not emit light in the first emission spectral region when irradiated with the first excitation energy.Type: ApplicationFiled: September 16, 2013Publication date: February 6, 2014Applicant: Angstrom Technologies, Inc.Inventors: William J. Coyle, Anthony Stramondo
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Publication number: 20140038100Abstract: 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.Type: ApplicationFiled: June 13, 2013Publication date: February 6, 2014Inventors: Kiyotada KATOH, Yoshihiro NORIKANE, Yasutada SHITARA, Shinji AOKI, Minoru MASUDA, Satoshi TAKAHASHI
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Patent number: 8642241Abstract: The present teachings describe an apparatus for mixing developer. The apparatus includes a first loader for dispensing a predetermined amount of toner particles into a container and a second loader for dispensing a predetermined amount and carrier particles in the container. A sealer seals the container. An acoustic mixer is provided for mixing the container, toner particles and carrier particles at a resonant frequency. A method of mixing developer is disclosed.Type: GrantFiled: December 21, 2011Date of Patent: February 4, 2014Assignee: Xerox CorporationInventors: Majid Kamel, Suxia Yang, Richard P. N. Veregin, Michael S. Hawkins, Cuong Vong, Santiago Faucher
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Publication number: 20140017609Abstract: A method for manufacturing carrier core particles for electrophotographic developer including a slurrying step (A) of making an iron-containing raw material and a strontium-containing raw material into slurry, a granulation step (B) of granulating the slurry mixture obtained in the slurrying step, and a firing step (C) of firing a powdery material, which is obtained by granulating the slurry mixture in the granulation step, at a predetermined temperature to form a magnetic phase. The slurrying step makes the iron-containing raw material into the slurry containing the iron-containing raw material having a volume diameter D50 of 1.0 to 4.0 ?m and a volume diameter D90 of 2.5 to 7.0 ?m, and makes the strontium-containing raw material into the slurry so that the carrier core particles for electrophotographic developer contain 0?y?5000 ppm, where y denotes the content of the strontium in the carrier core particles.Type: ApplicationFiled: March 2, 2012Publication date: January 16, 2014Applicants: DOWA IP CREATION CO., LTD., DOWA ELECTRONICS MATERIALS CO., LTD.Inventors: Takeshi Kawauchi, Tomohide IIda