Having Specified Toner Particle Size Distribution Patents (Class 430/110.4)
  • Patent number: 10795065
    Abstract: A solar-radiation-shielding material for vehicle windows reduces the visible light transmittance, and reduces the value of solar radiation transmittance/visible light transmittance. The visible light transmittance of the solar-radiation-shielding material is in the range of 5%. The transmission color of the solar-radiation-shielding material satisfies the Expression 2: ?14<a*<2, and ?8<b*<2.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: October 6, 2020
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventor: Kenichi Fujita
  • Patent number: 10670983
    Abstract: A toner set includes a white toner that includes white toner particles containing white colored particles, and at least one selected from a color toner that includes color toner particles containing colored particles and a transparent toner that includes transparent toner particles, wherein an average circularity of the white toner particles is smaller than an average circularity of either the color toner particles or the transparent toner particles and a small-diameter-side number particle diameter distribution index of the white toner particles is greater than a small-diameter-side number particle diameter distribution index of either the color toner particles or the transparent toner particles.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: June 2, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tetsuya Taguchi, Tomoaki Tanaka, Shinya Sakamoto, Ryutaro Kembo
  • Patent number: 10668456
    Abstract: A titanium oxide particle includes a metal having a hydrocarbon group, which is bonded to a surface of the titanium oxide particle through an oxygen atom, and absorbs light having a wavelength of 450 nm and light having a wavelength of 750 nm, wherein an element ratio C/Ti between carbon C and titanium Ti in a surface of the titanium oxide particle is from 0.3 to 1.2, and a reduced amount of C/Ti on the surface of the titanium oxide particle before and after irradiation with an ultraviolet ray having a wavelength of 352 nm and at an irradiation intensity of 1.3 mW/cm2 for 20 hours is from 0.1 to 0.9.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: June 2, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takeshi Iwanaga, Hiroyoshi Okuno, Hideaki Yoshikawa, Yasunobu Kashima, Sakae Takeuchi
  • Patent number: 10597503
    Abstract: A prepreg containing at least the following components [A]-[F], wherein the ratio Ne/Nd of the number of structures Ne of component [F] present in a range of outside 110% of the particle diameter of component [E] and the number of structures Nd of component [F] present in a range outside 110% of the particle diameter of component [D] is 0.25 or higher. [A]: Carbon fibers, [B] thermosetting resin, [C]: curing agent, [D]: particles composed mainly of thermoplastic resin having a primary particle number-average particle size of 5-50 ?m, [E]: conductive particles different from component [D] and having a primary particle number-average particle size in the range of a specific expression, [F]: filler comprising a carbon material.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: March 24, 2020
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Atsuhito Arai, Koji Furukawa, Naofumi Yamashita, Shinji Kochi, Yumi Kunimitsu, Yui Fujioka, Hiroshi Taiko
  • Patent number: 10501333
    Abstract: The present invention provides a spherical ferrite powder that is excellent in filling ability and moldability if used as a filler, is excellent in handling ability, and is high in resistivity; a resin compound including the ferrite powder; and a molded product made of the resin compound. The spherical ferrite powder including 15 to 30 wt % of ferrite particles having the particle diameter less than 11 ?m and have the volume average particle diameter of 10 to 50 ?m; the resin compound including the ferrite powder; and the molded product made of the resin compound are employed.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: December 10, 2019
    Assignees: POWDERTECH CO., LTD., TATSUTA ELECTRIC WIRE & CABLE CO., LTD.
    Inventors: Koji Aga, Tetsuya Igarashi, Akio Takahashi
  • Patent number: 10471417
    Abstract: A titanium oxide particle surface-treated with a silane compound having a hydrocarbon group has absorption at a wavelength of about 400 nm or more and about 800 nm or less in an ultraviolet-visible absorption spectrum, and has an absorption peak at a wave number of about 2700 cm?1 or more and about 3000 cm?1 or less in an infrared absorption spectrum.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: November 12, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Hidekazu Hirose, Hideaki Yoshikawa, Hiroyoshi Okuno, Takeshi Iwanaga, Yasunobu Kashima, Wataru Yamada, Sakae Takeuchi, Atsushi Sugitate
  • Patent number: 10268130
    Abstract: The instant disclosure describes methacrylate coated carrier resins with hydrophobic substituents for charge control and improved RH sensitivity.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: April 23, 2019
    Assignee: XEROX CORPORATION
    Inventors: Richard P N Veregin, Qingbin Li, Andriy Kovalenko, Sergey Gusarov, Daryl W. Vanbesien, Michael S. Hawkins
  • Patent number: 10036976
    Abstract: A developing device includes a developer bearer facing a latent image bearer, to rotate and supply developer to the latent image bearer, and a developer regulator to regulate an amount of the developer on a surface of the developer bearer. The developer regulator is in contact with the surface of the developer bearer. In the developing device, a ratio of a ten-point mean roughness of the developer regulator to a volume average particle diameter of the developer is not greater than 3.5%. The ratio is defined as Rzjis/Dv×100, where Rzjis represents the ten-point mean roughness measured in a nip-adjacent portion of a face of the developer regulator opposing the developer bearer, and Dv represents the volume average particle diameter of the developer. The nip-adjacent portion is adjacent to and downstream a downstream end of a regulation nip in a rotation direction of the developer bearer.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: July 31, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuji Nagatomo, Tetsumaru Fujita, Masato Tsuji, Yutaro Kaku
  • Patent number: 9921504
    Abstract: A toner according to an embodiment includes a colorant, a binder resin, and an ester wax. The colorant, the binder resin and the ester wax form a toner particle. The ester wax contains two or more ester compounds represented by the general formula R1COOR2, where R1 and R2 each independently is an alkyl group. The total number of carbon atoms of R1 and R2 is in a range from 31 to 53. The two or more ester compounds have different number of carbon atoms from each other.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: March 20, 2018
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Tsutomu Katsumata
  • Patent number: 9804524
    Abstract: A developing device includes a developer carrier that opposes an image carrier and rotates while carrying developer on a surface thereof; and a container that supports the developer carrier in a rotatable manner and contains the developer, the developer containing toner, first carrier subjected to frictional charging together with the toner, and second carrier having a diameter greater than a diameter of the first carrier and an electrical resistance lower than an electrical resistance of the first carrier.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: October 31, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shinichi Kuramoto, Yoshifumi Ozaki, Ryota Tomishi, Junichi Uchiyama, Yoshitaka Nakajima, Norihiro Tamazawa
  • Patent number: 9557668
    Abstract: The present invention is to provide a toner which has an excellent balance between heat-resistant storage stability and low-temperature fixability and which is excellent in printing durability even under a wide range of temperature and humidity environments from a low temperature and low humidity environment to a high temperature and high humidity environment. Disclosed is a toner for developing electrostatic images, containing colored resin particles containing a binder resin, a colorant, a softening agent and a retention aid, and an external additive, wherein the retention aid is a copolymer of at least one of acrylic acid ester and methacrylic acid ester and at least one of acrylic acid and methacrylic acid, and wherein the copolymer has an acid value of 0.5 to 7 mgKOH/g, a weight average molecular weight Mw of 6,000 to 50,000, and a glass transition temperature of 60 to 85° C.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: January 31, 2017
    Assignee: ZEON CORPORATION
    Inventors: Azusa Masuda, Ryuji Ohta
  • Patent number: 9377708
    Abstract: A toner has toner particles including a binder resin, a colorant, an ester wax and a hydrocarbon wax; and inorganic fine particles. The ester wax includes an ester compound having a structure represented by formula (1): R1—CO—O—(CH2)x—O—OC—R2; or formula (2): R3—O—OC—(CH2)x—CO—O—R4. The ester wax includes an ester compound having a highest abundance rate in an amount of 40% to 80% by mass with respect to a total amount of the ester wax in a composition distribution. The ester wax has, in differential scanning calorimetry, a peak top temperature of an endothermic peak of 65° C. to 80° C. In differential scanning calorimetry, the toner has only one endothermic peak derived from the waxes. A relationship: 3.0?(Tw?Tt)?8.0 is satisfied.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: June 28, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Michihisa Magome, Tomohisa Sano, Kozue Uratani
  • Patent number: 9081314
    Abstract: Method for producing structured particles specifically nanoparticles, toners for laser printers and photocopiers, particularly chemical toner with particular product properties. The method produces toners of improved performance. Method relates particularly to the selection and properties of the base materials and utilizing these properties to design the toner product properties that result in improved performance.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: July 14, 2015
    Assignee: Navran Advanced Nanoproducts Development International Pvt. Ltd.
    Inventor: Abhinava Kumar
  • Patent number: 9052626
    Abstract: In a toner for electrostatic latent-image development that includes toner core particles including at least a binder resin, and shell layers with which the entire surfaces of the toner core particles are coated, an ethylene-unsaturated carboxylic acid copolymer is present at the interface between the toner core particle and the shell layer.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: June 9, 2015
    Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Hidetoshi Miyamoto
  • Patent number: 9017914
    Abstract: A toner for developing an electrostatic latent image includes toner particles. An average aspect ratio of the toner particles, having predetermined diameters of at least 3 ?m and less than 10 ?m, is in the range from about 0.820 to about 0.900, and the difference between the maximum value and minimum value among the average aspect ratios D3, D4, D5, D6, D7, D8, and D9 is up to 0.07. Dn represents an average aspect ratio of those toner particles having a diameter of at least n ?m and less than n+1 ?m.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: April 28, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Takanori Tanaka
  • Publication number: 20150111140
    Abstract: A brilliant toner includes toner particles containing a brilliant pigment, and toner particles containing a yellow colorant without containing the brilliant pigment, wherein a ratio of the toner particles containing the yellow colorant without containing the brilliant pigment is 50% by number or greater.
    Type: Application
    Filed: May 1, 2014
    Publication date: April 23, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Daisuke NOGUCHI, Sakiko HIRAI, Masaru TAKAHASHI, Atsushi SUGITATE, Shuji SATO
  • Publication number: 20150111148
    Abstract: Porous resin particles of from about 3 ?m to about 25 ?m size made in an emulsion aggregation process where coalescence occurs under continuous conditions which enable, for example, more rapid coalescence, are described.
    Type: Application
    Filed: October 18, 2013
    Publication date: April 23, 2015
    Applicant: Xerox Corporation
    Inventors: David JW Lawton, Chieh-Min Cheng, David R. Kurceba, Eric J. Young
  • Publication number: 20150111144
    Abstract: Composite materials such as composite particles have a solid non-elastomeric continuous phase made of an organic polymer having a glass transition temperature of at least 25° C. Dispersed within this solid non-elastomeric continuous phase are many multi-compartment porous chemically crosslinked elastomeric particles that have a mode particle size of at least 1 ?m and up to and including 10 ?m. The composite particles can be used as toner particles in electrophotographic imaging methods to provide fused toner images and especially stacked fused toner images.
    Type: Application
    Filed: October 18, 2013
    Publication date: April 23, 2015
    Inventors: Mridula Nair, Joseph Salvatore Sedita, Peter David Rollinson
  • Patent number: 8962230
    Abstract: An electrostatic-image developing toner contains an amorphous polyester resin that has repeating units having a backbone derived from dehydroabietic acid in a main chain thereof and that has a weight average molecular weight of about 30,000 to about 80,000; and at least one of a crystalline polyester resin containing a dicarboxylic acid (C10) and a diol (C9) as polymerization components and a crystalline polyester resin containing a dicarboxylic acid (C9) and a diol (C10) as polymerization components.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: February 24, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Shigeru Seitoku
  • Patent number: 8962231
    Abstract: A toner for magnetic single-component development, which contains at least a binder resin which is a polyester resin, magnetic powder, and a charge control resin, wherein the ratio (%) of the area of the charge control resin present on the surface of the toner particles with respect to the area of the toner particles on an electron microscope image is made to be in a predetermined range corresponding to the particle diameter of the toner particles.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: February 24, 2015
    Assignee: Kyocera Document Solutions Inc.
    Inventors: Masashi Tamagaki, Takanori Tanaka
  • Patent number: 8945805
    Abstract: 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.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: February 3, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshinobu Baba, Koh Ishigami, Naoki Okamoto, Tomoko Endo
  • Patent number: 8936895
    Abstract: To provide a toner, which contains: base particles each having a core-shell structure, where a core of the base particle contains crystalline polyester, non-crystalline polyester, a colorant, and a releasing agent, and a shell of the base particle contain a resin, wherein the toner has thermal hardness of 0.5 to 1.8, wherein the toner has a softening index of 80° C. to 95° C., and wherein the toner has thermal retentiveness of 30° C. to 50° C.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: January 20, 2015
    Assignee: Ricoh Company, Ltd.
    Inventor: Hideki Sugiura
  • Patent number: 8932788
    Abstract: The present invention provides a toner containing at least a binder resin and a pigment, wherein the amount of the pigment in the toner is 3.0% by mass to 8.5% by mass, the volume average particle diameter of the toner is 2.0 ?m to 6.0 ?m, and a monochrome image, which has been fixed on a recording medium so that the amount of the toner adhered onto the recording medium is 0.25 mg/cm2, has a reflection density of 1.2 to 2.5.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: January 13, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinichi Wakamatsu, Hiroshi Yamashita, Naohiro Watanabe, Tsuyoshi Sugimoto
  • Patent number: 8916322
    Abstract: The present disclosure describes toner that is composed substantially of biodegradable and recycled materials.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: December 23, 2014
    Assignee: Xerox Corporation
    Inventors: Guerino G. Sacripante, Shigang Qiu, Santiago Faucher, Ke Zhou, John Abate, John Kallo
  • Patent number: 8889330
    Abstract: A toner including a mother toner particle having a core-shell structure formed of a core containing a binder resin, a coloring agent, and an optional releasing agent, and a shell having a layer thickness of from 0.01 to 2.00 ?m, the core having a softening index of from 60 to 85° C. as measured by a flow tester, and the shell having a thermal hardness of from 0.7 to 1.8 m, and an optional external additive.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: November 18, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideki Sugiura, Yuka Mizoguchi
  • Patent number: 8889326
    Abstract: A toner including a colorant, a resin, and a volatile organic compound in an amount from 1 to 200 ?g/g is provided. The toner has a softening index Ct within a range from 70 to 100° C.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: November 18, 2014
    Assignee: Ricoh Company, Ltd.
    Inventor: Hideki Sugiura
  • Patent number: 8871418
    Abstract: A toner containing: a core containing at least a first binder resin, a colorant, and a releasing agent; and a shell containing at least a second binder resin; wherein the toner has a core-shell structure, and has a softening index of 86° C. to 95° C. and a thermal hardness of 0.7 to 1.8.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: October 28, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideki Sugiura, Yuka Mizoguchi
  • Patent number: 8841056
    Abstract: 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?6 N/sec to measure a displacement level (?m) at a point of time where the force has reached a maximum force of 4.90×10?4 N, the displacement level of the toner at a measurement temperature of 25° C. is represented by X(25) and the displacement level of the toner at a measurement temperature of 50° C. by X(50), and the number average particle diameter of the toner is represented by D (?m), the X(25), X(50) and D satisfies the relations: 0.10?X(25)/D?0.35??(1) 30?[X(50)?X(25)]/X(25)×100?150??(2).
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: September 23, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazumi Yoshizaki, Shinya Yachi, Yasushi Katsuta, Kenichi Nakayama, Takeshi Kaburagi
  • Publication number: 20140199623
    Abstract: The disclosure describes a process to produce toner with tunable gloss levels comprising a stabilizer to freeze particle growth following aggregation, where the stabilizer does not chelate metal ions.
    Type: Application
    Filed: January 15, 2013
    Publication date: July 17, 2014
    Applicant: XEROX CORPORATION
    Inventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Edward Graham Zwartz, Cuong Vong, Shigang Qiu
  • Patent number: 8765344
    Abstract: An electrophotographic toner and a method of preparing the same, the electrophotographic toner including a binder that includes two kinds of resin having different weight average molecular weights, a colorant, and a releasing agent.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: July 1, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jun-young Lee, Kyeong Pang, Tae-hoe Koo, Su-bum Park, Ju-yeon Lee
  • Publication number: 20140162184
    Abstract: The present disclosure describes a color single component toner with desirable fusing performance.
    Type: Application
    Filed: December 12, 2012
    Publication date: June 12, 2014
    Applicant: XEROX CORPORATION
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Michael F. Zona, Mark E. Mang, Maura A. Sweeney, Robert D. Bayley
  • Publication number: 20140162181
    Abstract: The present disclosure describes a black single component toner with desirable fusing performance.
    Type: Application
    Filed: December 12, 2012
    Publication date: June 12, 2014
    Applicant: XEROX CORPORATION
    Inventors: Grazyna E Kmiecik-Lawrynowicz, Michael F. Zona, Mark E. Mang, Maura A. Sweeney, Robert D. Bayley
  • Patent number: 8741530
    Abstract: A method of forming an image on a substrate with an electrophotographic photoreceptor and a toner, a photosensitive layer of the electrophotographic photoreceptor contains a resin having a structural unit represented by the following formula (A) the toner containing toner matrix particles formed in an aqueous medium; the toner has a volume median diameter (Dv50) of from 4.0 ?m to 7.0 ?m; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m satisfies following formula (1) Dns?0.233EXP(17.3/Dv50)??(1).
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: June 3, 2014
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Teruyuki Mitsumori, Kozo Ishio, Hiroaki Takamura, Masaya Oota, Shiho Sano, Takeshi Oowada, Masakazu Sugihara, Teruki Senokuchi, Shiro Yasutomi, Yumi Hirabaru
  • Patent number: 8722301
    Abstract: A transparent electrostatic charge image developing toner satisfies the relationships of the following Formulas (1), (2), and (3) wherein Dt (?m) is a volume average particle diameter, upper GSDv is an upper volume particle size distribution index, and lower GSDp is a lower number particle size distribution index: 18?Dt?30;??Formula (1): 1.05?upper GSDv?1.20;??Formula (2): 1.29?lower GSDp?1.50??Formula (3).
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: May 13, 2014
    Assignee: Fuji Xerox Co., Ltd
    Inventors: Tsuyoshi Murakami, Satoshi Yoshida
  • Patent number: 8663891
    Abstract: Disclosed are a toner for developing an electrostatic latent image and a method of preparing the same. The toner may include latex, a pigment and a releasing agent. The lowest crossover temperature of the toner at which the storage modulus (G?) and the loss modulus (G?) of the toner are substantially equal to each other may be in the range of about 65 to about 80° C. The weight average molecular weight (Mw) of the toner may be in the range of about 65,000 to about 75,000. The z-average molecular weight (Mz) of the toner may be in the range of about 110,000 to about 220,000.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: March 4, 2014
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventors: Jun-Young Lee, Min-Young Cheong, Jae-Hwan Kim, Yo-Da Shin, Tae-Hoe Koo
  • Patent number: 8647802
    Abstract: 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: Grant
    Filed: March 6, 2008
    Date of Patent: February 11, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinzo Higuchi, Hiroshi Takahashi
  • Patent number: 8609315
    Abstract: A transparent toner includes toner particles having a volume average particle diameter in the range of 18 ?m to 28 ?m, and satisfying formulae (1) and (2): 0.1?Ntb/Nta×100?2.5??(1) 0?Ntc/Nta×100?1.0??(2) Nta is the number of particles under the measurement conditions satisfying 0.5 ?m?circle-equivalent diameter?200 ?m, and 0.40?circularity?1.00; Ntb is the number of particles under the measurement conditions satisfying 0.5×Dta (?m)?circle-equivalent diameter?2.5×Dta (?m), and 0.60?circularity?0.90; and Ntc is the number of particles under the measurement conditions satisfying 2.5×Dta (?m)?circle-equivalent diameter?200 ?m, and 0.40?circularity?1.00; Dta is the average circle-equivalent diameter under the measurement conditions satisfying 0.5?m?circle-equivalent diameter?200 ?m, and 0.40?circularity?1.00.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: December 17, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Yoshida, Tsuyoshi Murakami
  • Patent number: 8586275
    Abstract: An electrostatic-image-developing toner includes toner particles containing a binder resin, a colorant, and a release agent, wherein the toner contains colorless binder resin particles and, of the colorless binder resin particles, particles having a volume-average particle size diameter 1.5 times as large as, or larger than that of, D50 of the toner particles are in a proportion of about 30 particles or less particles per 5,000 toner particles, with D50 being a volume-average particle size diameter of the toner particles.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: November 19, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hitomi Akiyama, Junichi Tomonaga, Yasunobu Kashima
  • Publication number: 20130295500
    Abstract: A fluorescing dry toner particle comprises a polymeric binder phase comprising a non-fluorescing binder polymer and a polymeric fluorescing colorant dispersed within the non-fluorescing binder polymer. The polymeric fluorescing colorant comprises a fluorescing moiety that is covalently attached to a colorant polymer that is the same or different than the non-fluorescing binder polymer, but the polymeric fluorescing colorant is blendable with the non-fluorescing binder polymer to form a homogeneous polymeric binder matrix, and is present in an amount of at least 1 weight % and up to and including 40 weight %, based on the total fluorescing dry toner particle weight. These fluorescing dry toner particles can be used in various dry developers to provide fluorescing toner images with or without non-fluorescing color toner images.
    Type: Application
    Filed: March 15, 2013
    Publication date: November 7, 2013
    Inventors: Dinesh Tyagi, Louise Granica
  • Patent number: 8574800
    Abstract: A toner for electrostatic charge image development includes toner particles and fatty acid metal salt particles. The content of the fatty acid metal salt particles is from 0.2 parts by weight to 5 parts by weight with respect to 100 parts by weight of the toner particles; the weight of fatty acid metal salt particles remaining on a sieve having an opening of 25 ?m when the toner is sieved with the sieve having an opening of 25 ?m is from 0.015% by weight to 0.300% by weight with respect to the total weight of the toner; and the weight of fatty acid metal salt particles remaining on a sieve having an opening of 45 ?m when the toner is sieved with the sieve having an opening of 45 ?m is 0.030% by weight or less with respect to the total weight of the toner.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: November 5, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masahiro Okita, Yutaka Saito, Yasuaki Hashimoto
  • Publication number: 20130260309
    Abstract: 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.
    Type: Application
    Filed: March 28, 2013
    Publication date: October 3, 2013
    Applicant: KYOCERA Document Solutions Inc.
    Inventor: Hidetoshi Miyamoto
  • Patent number: 8518620
    Abstract: To provide a magnetic toner which: enables a stable image density to be obtained irrespective of a use environment; and exhibits excellent low-temperature fixability, little image deterioration upon fixation, high coloring power, and a reduced toner consumption. The present invention relates to a magnetic toner containing at least: a binder resin; and a magnetic body. The binder resin contains a polyester unit. The toner has a weight average particle size of 5.0 to 9.0 ?m, a true specific gravity of 1.3 to 1.7 g/cm3, and a saturated magnetization of 20 to 35 Am2/kg in a magnetic field of 796 kA/m. The dielectric loss tangent (tan ?) of the toner satisfies (tan ?H?tan ?L)/tan ?L?0.20 at 100 kHz.
    Type: Grant
    Filed: October 28, 2004
    Date of Patent: August 27, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadashi Dojo, Nene Dojo, Tomohisa Sano
  • Patent number: 8501378
    Abstract: An electrophotographic toner includes a latex, a colorant, and a release agent, wherein G?(80) is in a range of about 2.0×105 Pa to about 3.0×106 Pa and G?(80)/G?(140) is in a range of about 2.0×102 to about 3.0×103, wherein in regard to a molecular weight distribution on a gel permeation chromatography (GPC) chromatogram, the molecular weight region of 1.0×104 g/mol or less of a tetrahydrofuran (THF)-soluble component of the electrophotographic toner is about 5% or less, and the molecular weight region of 1.0×105 g/mol or more of the THF-soluble component of the electrophotographic toner is in a range of about 5% to about 20%, where G?(80) and G?(140) respectively denote storage moduli of the electrophotographic toner at temperatures of 80° C. and 140° C. when a dynamic viscoelasticity according to a sine-wave vibration is measured at an angular velocity of 6.28 rad/sec and at a temperature increase rate of 2.0° C./min.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: August 6, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jeong-hyun Lee, Yong-kyun Jung, Kyeong Pang
  • Patent number: 8501055
    Abstract: A toner manufacturing method, a toner manufacturing apparatus, and a toner are disclosed. The toner manufacturing apparatus includes a droplet generating unit that includes a thin film in which plural nozzles are formed, and an annular vibrating unit that is arranged at a perimeter of a deformable domain of the thin film for vibrating the thin film; a storage unit for storing a toner-containing liquid that includes at least a resin and a colorant, and for supplying the toner-containing liquid 10 to the droplet generating unit; and a granulating unit for solidifying droplets that are periodically breathed out from the nozzles of the droplet generating unit to form toner particles.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: August 6, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinji Ohtani, Yoshihiro Norikane, Seichin Kinuta
  • Patent number: 8497056
    Abstract: A magenta toner characterized by satisfying, in DSC measurement, 40.0?Tg(0.5)?60.0 and 2.0?Tg(4.0)?Tg(0.5)?10.0, wherein when preparing a solution of which the magenta toner is dissolved in ethyl acetate, and defined the concentration of the thereof as Cm1 (mg/ml), and the light absorbance thereof at a wavelength of 538 nm as A(ethyl acetate)538, the ratio of A(ethyl acetate)538 to Cm1 satisfies the formula, A(ethyl acetate)538/Cm1<0.15, and, when preparing a solution of which the magenta toner is dissolved in chloroform, and defined the concentration of the thereof as Cm2 (mg/ml), and the light absorbance thereof at a wavelength of 538 nm as A(chloroform)538, the ratio of A(chloroform)538 to Cm2 satisfies the formula, 2.00<A(chloroform)538/Cm2<6.55.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: July 30, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ayako Sekikawa, Takaaki Kaya, Atsushi Tani, Shigeto Tamura
  • Publication number: 20130143153
    Abstract: A transparent electrostatic charge image developing toner satisfies the relationships of the following Formulas (1), (2), and (3) wherein Dt (?m) is a volume average particle diameter, upper GSDv is an upper volume particle size distribution index, and lower GSDp is a lower number particle size distribution index: Formula (1): 18?Dt?30; Formula (2): 1.05?upper GSDv?1.20; and Formula (3): 1.29?lower GSDp?1.50.
    Type: Application
    Filed: April 12, 2012
    Publication date: June 6, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Tsuyoshi MURAKAMI, Satoshi YOSHIDA
  • Patent number: 8445172
    Abstract: A method for producing a toner, containing: ultrasonically vibrating a liquid toner composition in which a toner material containing at least a binder resin and a colorant is dissolved or dispersed in a solvent; introducing the liquid toner composition to a liquid chamber, and ejecting the liquid toner composition as droplets from an ejecting plate having a plurality of holes and disposed on one surface of the liquid chamber; and drying and solidifying the droplets so as to produce a toner, wherein the ultrasonically vibrating is performed before the introducing the liquid toner composition to the liquid chamber.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: May 21, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasutada Shitara, Yoshihiro Norikane, Yohichiroh Watanabe, Andrew Mwaniki Mulwa
  • Patent number: 8431301
    Abstract: There is provided a toner for developing an electrostatic charge image including a binder resin, a colorant and a releasing agent, wherein the content ratio of particles having a number particle diameter of 4.5 ?m or more and less than 7.5 ?m and a circularity degree of 0.980 or more is in a range from about 5 number % to about 15 number %, and the content ratio of particles having a number particle diameter of not 7.5 ?m or more and less than 15 ?m and a circularity degree of 0.900 or more and less than 0.940 is about 5 number % or less.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: April 30, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masanobu Ninomiya, Kiyohiro Yamanaka, Hirokazu Hamano, Eisuke Iwazaki, Hiroshi Nakazawa
  • Patent number: 8426095
    Abstract: Disclosed is a decolorable toner containing a binder resin and a coloring agent which contains a color former compound and a color developing agent and has a capsule structure such that it is covered with an outer shell, and having a volume average particle diameter of from 5.0 to 15.0 ?m and a number-based particle size distribution CV of 35% or less.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: April 23, 2013
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Takayasu Aoki, Junichi Ishikawa, Tsuyoshi Itou
  • Patent number: 8409775
    Abstract: The present invention relates to a toner for electrophotography which has a small particle size and is excellent in all of low-temperature fusing ability, anti-hot offset property and image characteristics and a process for producing the toner, as well as to a dispersion of crosslinked resin particles which is used for production of the toner for electrophotography and a process for producing the dispersion of crosslinked resin particles. The dispersion of crosslinked resin particles having a volume median particle size (D50) of from 0.05 to 0.7 ?m according to the present invention is produced by a process including the steps of (A) neutralizing a resin containing an acid group-containing polyester in an aqueous medium to obtain a dispersion of resin particles; and (B) mixing the dispersion of resin particles obtained in the step (A) with an oxazoline group-containing polymer at a temperature of from 60 to 100° C.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: April 2, 2013
    Assignee: Kao Corporation
    Inventors: Manabu Suzuki, Yutaka Murai