Identified Physical Parameter Of Carrier Particle Or Dry Toner Particle, Etc. (tg, Mw, Coercivity, Density, Etc.) Patents (Class 430/111.4)
  • Patent number: 10815403
    Abstract: The present invention relates to a polyester resin composition for a hot melt adhesive and a polyester resin produced therefrom. The polyester resin is excellent in adhesiveness to plate substrates, flexibility, and processability.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: October 27, 2020
    Assignee: SK CHEMICALS CO., LTD.
    Inventors: Dong Hun Yi, Soon-Ki Kim, Hyung-gon Kim, Jong-ki Sim
  • Patent number: 10772836
    Abstract: A method for producing particles, the method including: applying vibration to a liquid including a physiologically active substance and included in a liquid-column resonance liquid-chamber to form a standing wave based on liquid column resonance, to thereby discharge the liquid from at least one discharging port, which is formed in an amplitude direction of the standing wave, to at least one region corresponding to at least one anti-node of the standing wave; and drying the liquid discharged, to thereby form particles.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: September 15, 2020
    Assignees: RICOH COMPANY, LTD., SHIZUOKA PREFECTURAL UNIVERSITY CORPORATION
    Inventors: Satomi Onoue, Hideyuki Sato, Yoshiki Seto, Tatsuru Moritani, Tadahiko Morinaga
  • Patent number: 10761444
    Abstract: An electrostatic charge image development toner satisfies the following: a maximum slope of an absolute value of log (loss modulus G?) from 60° C. to 90° C. is 0.07 or more and 0.16 or less; a maximum slope of an absolute value of log (loss modulus G?) from 90° C. to 130° C. is 0.08 or less; and G?(60) is 5.0×107 Pa or more and 1.0×1010 Pa or less, where G?(60) is a loss modulus at 60° C.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: September 1, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Atsushi Sugawara, Yasuo Kadokura, Daisuke Tomita, Sakiko Hirai, Satoshi Miura
  • Patent number: 10759145
    Abstract: There is provided a process for preparing a laminate, comprising electrostatically printing a transparent electrostatic ink composition onto a base material, wherein the transparent electrostatic ink composition comprises a thermoplastic resin, and a charge adjuvant and/or a charge director; providing a substrate; and contacting the substrate with the transparent electrostatic ink composition while the thermoplastic resin is softened or molten, and then allowing the thermoplastic resin to harden, so that the electrostatic ink composition adheres the base material and the substrate together. Laminate materials are also disclosed.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: September 1, 2020
    Assignee: HP Indigo B.V.
    Inventors: Inna Tzomik, Daniel Skvirsky, Hannoch Ron, Yaniv Kachlon, Gleb Romantcov, Faina Kogan, Raia Slivniak, Sergio Brandriss, Alexander Stolov
  • Patent number: 10725392
    Abstract: The present invention relates to an electrostatic charge image developing toner, wherein when a tan ? measurement is performed twice by a rheometer, in the first measurement, a tan ? value measured at 130° C. is set as TP1 (130° C.), and a tan ? value measured at 140° C. is set as TP1 (140° C.), in the second measurement, a tan ? value measured at 140° C. is set as TP2 (140° C.), TP2 (140° C.)/TP1(140° C.) is equal to or smaller than 0.95, and TP1 (130° C.) is equal to or greater than 2.5.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: July 28, 2020
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kumiko Kameya, Tomoko Nakagawa, Yuki Narukawa, Masaya Ota, Tetsuharu Yuge
  • Patent number: 10724903
    Abstract: The present invention refers to a Raman active composite material comprising a metal particle; a coating layer of a Raman active molecule bound to the metal particle; and an encapsulating layer of an amphiphilic polymer bound to the metal particle. The present invention also refers to methods of manufacturing a Raman active composite material described herein and their uses.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: July 28, 2020
    Assignee: NANYANG TECHNOLOGICAL UNIVERSITY
    Inventors: Hongyu Chen, Miaoxin Yang, Jun Xu, Yuhua Feng
  • Patent number: 10663876
    Abstract: A toner includes binder resin 101 and a coloring agent 102. The coloring agent 102 is configured so that hue of a hue measurement print image printed on a print medium with the toner satisfies ?8.6?a*(Y)??7.9 and 93.4?b*(Y)?95.4, where a*(Y) and b*(Y) represent an a* value and a b* value of the hue measurement print image and light resistance F of a light resistance measurement print image printed on a print medium with the toner, after an irradiation test in which the light resistance measurement print image is irradiated with light having 0.36 W/m2 spectral irradiance at a wavelength of 340 nm for 663 hours, is higher than or equal to 70%. The toner is configured so that its melt viscosity at 120° C. is higher than or equal to 1400 Pa·s and lower than or equal to 1600 Pa·s.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: May 26, 2020
    Assignee: Oki Data Corporation
    Inventor: Takeshi Kojima
  • Patent number: 10539899
    Abstract: A toner comprising a toner particle that contains a binder resin, wherein the surface of the toner particle has a reaction product of a polyhydric acid and a compound that contains a group 4 element.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: January 21, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kunihiko Nakamura, Kenta Kamikura, Maho Tanaka, Yusuke Kosaki
  • Patent number: 10539893
    Abstract: A toner comprising a toner particle comprising a binder resin, wherein a layer comprising an organosilicon condensate is present on the surface of the toner particle; the layer comprising the organosilicon condensate further comprises a reaction product of a compound comprising at least one metal element selected from all the metal elements belonging to Groups 3 to 13, and a polyhydric acid; in a backscattered electron image of the toner captured at a magnification of 50,000 times by using a scanning electron microscope, an average value of an area of the reaction product is from 10 nm2 to 5000 nm2, and a coefficient of variation of the area of the reaction product is not more than 10.0.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: January 21, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Maho Tanaka, Kunihiko Nakamura, Kenta Kamikura, Yusuke Kosaki
  • Patent number: 10514640
    Abstract: An image forming method includes developing an electrostatic latent image formed on a photoreceptor with a toner, transferring a formed toner image onto a recording material, and fixing the toner image on a surface of the recording material, in which a storage elastic modulus of the toner is 2.0×106 Pa or more at 70° C. and 4.0×104 Pa or less at 90° C., and in the fixing, a fixing belt having an elastic layer which contains a material having a storage elastic modulus of 1.0×106 Pa or more and 2.5×106 Pa or less at 200° C. is used.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: December 24, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventor: Susumu Sudo
  • Patent number: 10509353
    Abstract: An image forming apparatus includes an image former; a detector; and a hardware processor that: calculates a minimum area for each of the plurality of tones based on image data of the image, calculates a density ratio between the densities before and after the transferring is made for each of the plurality of tones from the densities detected by the detector, extracts as a first area a minimum area of a tone corresponding to a density ratio which switches from less than a predetermined threshold to equal to or more than the threshold, and extracts as a second area a minimum area of a tone the density ratio of which is a maximum, and changes a setting of a dot size of the image so that a size of the second area becomes the same as a size of the first area until the next setting change is performed.
    Type: Grant
    Filed: February 17, 2019
    Date of Patent: December 17, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventor: Tomo Kitada
  • Patent number: 10004292
    Abstract: The manufacturing of articles relies on the bonding of two or more components to form some forms of the articles, such as a shoe sole bonded with a shoe upper. The bonding may be achieved with an adhesive particulate that is applied to a surface of a substrate. The adhesive particulate is selectively fused to the substrate with a controlled energy source, such as a laser. The selective application of laser energy allows for specific geometric structures of adhesive particulate to be formed on the substrate. The substrate having the fused adhesive particulate is mated with another component allowing the fused adhesive particulate to bond the first substrate and the second component.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: June 26, 2018
    Assignee: NIKE, INC.
    Inventor: Jeff Darland
  • Patent number: 9594324
    Abstract: An electrostatic latent image developing toner contains a plurality of toner particles. The toner particles each include a toner mother particle and an external additive. The toner mother particle includes a toner core and a shell layer disposed over a surface of the toner core. The shell layer contains a thermosetting resin and a thermoplastic resin. The toner mother particles have a surface roughness of no less than 10 nm and no greater than 15 nm. The toner mother particles have a surface adsorbability of no less than 10 nN and no greater than 20 nN.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: March 14, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Masashi Tamagaki, Tomoyuki Ogawa
  • Patent number: 9557673
    Abstract: An electrostatic charge image developing toner includes toner particles containing a binder resin and inorganic particles that are present in a state of being embedded into the surfaces of the toner particles and being exposed, and satisfy the following expression: 20° C.?T1?T10, wherein T1 represents the temperature at which the viscosity under an applied pressure of 1 MPa becomes 104 Pa·s, and T10 represents the temperature at which the viscosity under an applied pressure of 10 MPa becomes 104 Pa·s.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: January 31, 2017
    Assignee: FUJI XEROX CO., LTD
    Inventor: Yasuo Matsumura
  • Patent number: 9448499
    Abstract: An electrophotographic toner having good grindability, and excellent fixability and durability, and a method of producing the same are provided. The electrophotographic toner includes an amorphous bioplastic having a weight average molecular weight (Mw) of 30,000 to 100,000, and at least one of a phenol resin and a terpene phenol resin as a grinding aid.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: September 20, 2016
    Assignee: CASIO COMPUTER CO., LTD.
    Inventors: Kenji Kihira, Hideki Ikeda, Yuichiro Iegaki, Yuta Kan
  • Patent number: 9229347
    Abstract: A carrier for use in a two-component developer for developing an electrostatic latent image is provided. The carrier includes a particulate magnetic core; and a cover layer located on a surface of the particulate magnetic core and including a resin and a particulate electroconductive material. The carrier has a BET specific surface area of from 0.8 to 1.6 m2/g.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: January 5, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroyuki Kishida, Shigenori Yaguchi, Hiroshi Tohmatsu, Koichi Sakata, Hitoshi Iwatsuki, Toyoaki Tano, Kenichi Mashiko
  • Patent number: 9176413
    Abstract: There is provided a liquid developer containing a toner that has a ratio G?(65)/G?(90) of a storage modulus G?(65) at 65° C. to a storage modulus G?(90) at 90° C. of from 1×10 to 1×103, and a carrier liquid that has a difference ?SP(tc) of SP value between the carrier liquid and the toner of from 1.5 to 7.0, and an image forming apparatus containing an electrostatic latent image holding member, a charging device, a latent image forming device, a developing device, a transfer device and a fixing device.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: November 3, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Tatsuura, Keitaro Mori, Nobuhiro Katsuta
  • Patent number: 9176406
    Abstract: Toner contains a binder resin containing a crystalline resin having a urethane and/or urea bonding; and a colorant, wherein in a diffraction spectrum of the toner as measured by an X-ray diffraction instrument, a ratio {C/(C+A)} of an integral intensity C of the spectrum derived from the crystalline structure to an integral intensity A of the spectrum derived from the non-crystalline structure is 0.12 or greater, wherein the toner satisfies the following relation 1: T1?T2?30° C. (Relation 1), where T1 represents the maximum endothermic peak in the first temperature rising from 0° C. to 100° C. at the temperature rising rate of 10° C./min and T2 represents the maximum exothermic peak in the first temperature falling from 100° C. to 0° C. at the temperature falling rate of 10° C./min as T1 and T2 are measured by diffraction scanning calorimetry (DSC).
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: November 3, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoyuki Sekiguchi, Hiroshi Yamashita, Minoru Masuda, Susumu Chiba, Tatsuya Morita, Atsushi Yamamoto, Shinya Nakayama, Masahide Yamada, Kohsuke Nagata, Keiji Makabe, Toyoshi Sawada
  • Patent number: 9170512
    Abstract: A decolorable electrophotographic toner, containing a color former compound, a color developing agent, a binder resin, and a release agent, wherein the toner has a pH of from 6 to 9 when dispersed in water with a pH of from 5.5 to 7 at a mass ratio of toner/water of 1/10.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: October 27, 2015
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Satoshi Araki
  • Patent number: 9128400
    Abstract: To provide a toner that can keep its melt-sticking to sleeve from occurring and, even in double-sided printing, can keep high-temperature offset from occurring and obtain high-quality images on both the surface and the back. The toner comprises toner particles each of which contains a binder resin containing a resin formed by the reaction of i) a resin (A) having a softening point TA (° C.) of 70° C. to 105° C. and having a peak top of endothermic peaks at 55° C. to 120° C. with ii) a resin (B) having a softening point TB (° C.) of 120° C. to 160° C. and having a peak top of endothermic peaks at 55° C. to 120° C., and, in its viscoelasticity characteristics, has a storage elastic modulus at temperature 180° C. (G?180) of 3.0×103 Pa to 3.0×104 Pa, where the loss tangent tan ? has at least one peak having a peak top within the range of 50° C. to 70° C. and, when peak top temperature of the peak is represented by T(° C.), the loss tangent at T+10(° C.) [tan ?(T+10)] is 1.0 to 1.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: September 8, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Toru Takahashi, Katsuhisa Yamazaki, Shuhei Moribe, Daisuke Yoshiba, Daisuke Tsujimoto, Masami Fujimoto
  • Patent number: 9081316
    Abstract: An electrophotographic toner including a binder, a colorant and a releasing agent, and a method of preparing the electrophotographic toner.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: July 14, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jin-mo Hong, Jae-hwan Kim, Kyeong Pang, Su-bum Park, Jeong-hyun Lee, Mi-rim Cho
  • Patent number: 9034552
    Abstract: The carrier core particles for electrophotographic developer have a volume size distribution with a median particle size ranging from 30 ?m to 40 ?m, the ratio of the carrier core particles having a diameter of 22 ?m or lower in the volume size distribution is from 1.0% to 2.0%, the ratio of the carrier core particles having a diameter of 22 ?m or lower in a number size distribution is 10% or lower, and the magnetization of the carrier core particles in an external magnetic field of 1000 Oe is from 50 emu/g to 75 emu/g.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: May 19, 2015
    Assignees: DOWA ELECTRONICS MATERIALS CO., LTD., DOWA IP CREATION CO., LTD.
    Inventors: Tomohide Iida, Tomoya Yamada, Takashi Fujiwara
  • Publication number: 20150132693
    Abstract: An emulsion aggregation (EA) toner includes an amorphous polymeric resin, optionally a colorant, and a small molecule crystalline organic compound having molecular weight less than 1,000 g/mol and melting point less than the fusing temperature of the EA toner, wherein a mixture of the resin and the small molecule compound is characterized by a reduction in glass transition temperature from that of the resin and by the lack of a significant solid to liquid phase transition peak for the small molecule compound as determined by differential scanning calorimetry, the enthalpy of fusion for the small molecule compound in the mixture being measured to be less than 10% of the enthalpy of fusion of the compound in pure form. Furthermore, the EA toner may be configured to have a crease fix minimum fusing temperature (MFT) less than or equal to the crease fix MFT of a benchmark ultra-low-melt emulsion aggregation toner.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 14, 2015
    Applicant: XEROX CORPORATION
    Inventors: JORDAN H. WOSNICK, Ke Zhou, Valerie M. Farrugia, Kentaro Morimitsu, Edward G. Zwartz
  • Patent number: 9029061
    Abstract: A carrier for use in a two component developer for developing an electrostatic latent image is provided. The carrier includes a particulate core material; and a cover layer located on a surface of the core material and including a silicone resin and barium sulfate. The cover layer includes Ba and Si at an atomic ratio of from 0.01 to 0.08 as determined by X-ray photoelectron spectroscopy.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: May 12, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Koichi Sakata, Minoru Masuda, Hisashi Nakajima, Kimitoshi Yamaguchi, Yutaka Takahashi, Hitoshi Iwatsuki, Saori Yamada, Toyoaki Tano
  • Publication number: 20150104742
    Abstract: Toner compositions comprising toner particles are described, where the toner particles have an elastic modulus in the range of about 100 Pa to about 1050 Pa and/or have a viscous modulus in the range of about 100 Pa to about 1000 Pa.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 16, 2015
    Applicant: XEROX CORPORATION
    Inventors: Juan A. MORALES-TIRADO, David John William LAWTON, Vincenzo G. MARCELLO
  • Patent number: 9005862
    Abstract: A toner including a crystalline polyester resin (A), an amorphous resin (B), and a composite resin (C) having a condensation polymerization resin unit and an addition polymerization resin unit is provided. A molecular weight distribution of the toner based on THF-soluble contents thereof has a main peak within a molecular weight range from 1,000 to 10,000 and a half bandwidth of the main peak is 15,000 or less. The molecular weight distribution is determined by gel permeation chromatography. The toner includes chloroform-insoluble contents. A ratio C/R of the toner is within a range from 0.03 to 0.55. C and R represent heights of spectrum peaks specific to the crystalline polyester resin (A) and the amorphous resin (B), respectively, determined by a Fourier transform infrared spectroscopic attenuation total reflection method after the toner is stored in a thermostatic chamber at 45° C. for 12 hours.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: April 14, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Masashi Nagayama, Hisashi Nakajima, Saori Yamada, Shinya Hanatani, Mariko Takii, Yoshitaka Sekiguchi
  • Patent number: 8999618
    Abstract: A toner set, including: at least one chromatic toner containing a colorant; and a transparent toner containing no colorant, wherein the chromatic toner and the transparent toner each include a releasing agent and a binder resin, and wherein an amount of a tetrahydrofuran insoluble matter in the transparent toner is smaller than an amount of a tetrahydrofuran insoluble matter in the chromatic toner.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: April 7, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryuuta Yoshida, Satoshi Ogawa, Masaki Watanabe, Hyo Shu, Naohiro Watanabe
  • Publication number: 20150072283
    Abstract: The disclosure describes a pigment of certain surface area for use in toner.
    Type: Application
    Filed: August 28, 2013
    Publication date: March 12, 2015
    Applicant: Xerox Corporation
    Inventors: Kevin F. Marcell, Maria M. Barden, Kimberly Anne Stoll, Christopher M. Wolfe, Brian J. Andaya
  • 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: 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: 8921023
    Abstract: Provided is a magnetic carrier excellent in leakage, uniformity of a solid image having satisfactory charging stability and developing performance at low electric field. The magnetic carrier is a magnetic carrier comprising: a magnetic substance-dispersed resin carrier core, which contains a magnetic substance and a binding resin, and a coating resin on a surface thereof, wherein: the carrier core has resistivity at 1000 V/cm of 5.0×106-8.0×107 ?·cm, the magnetic substance has a number average particle diameter of 0.20-0.35 ?m; and comprises magnetic-substance particles having vertexes and a particle diameter of 0.53 ?m or more in an amount of 10.0-32.0 vol % based on a total amount of the magnetic substance; and wherein: the carrier core has Fe2O3 content of 98.00% by mass or more; and ZnO content of 0.06-0.50% by mass.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: December 30, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshinobu Baba, Koh Ishigami, Masayuki Hama, Kentaro Kamae, Hiroaki Kawakami
  • Patent number: 8895218
    Abstract: Employment of a carrier core material for an electrophotographic developer containing 0.8 to 5% by weight of Mg, 0.1 to 1.5% by weight of Ti, 60 to 70% by weight of Fe and 0.2 to 2.5% by weight of Sr and having an amount of Sr dissolved with a pH4 standard solution of 80 to 1000 ppm, a carrier using the core material and a process for producing them, and an electrophotographic developer using the carrier.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: November 25, 2014
    Assignee: Powdertech Co., Ltd.
    Inventors: Takashi Kojima, Toru Iwata, Koji Aga
  • Patent number: 8877419
    Abstract: The present invention provides a composite color image forming method. The method includes electrically charging a latent image-holding member; exposing the charged latent image-holding member to light to form an electrostatic latent image; developing the electrostatic latent image with a two-component developer containing toner particles of one color and a carrier to form a toner image on the latent image-holding member; primarily transferring the toner image from the latent image-holding member to an intermediate transfer member; repeating the electrically charging, the exposing, the developing, and the primarily transferring, while the toner particles are replaced with toner particles of different color, to form a composite color image on the intermediate transfer member; and secondarily transferring the composite color image from the intermediate transfer member to a recording medium.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: November 4, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Inoue, Koutarou Yoshihara, Yosuke Tsurumi, Moegi Iguchi, Masahiro Takagi
  • 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: 8865856
    Abstract: A polycarbonate of number average molecular weight from 500 to 10000, glass transition point from 30 to 80° C. and hydroxyl group value of 30 mg KOH/g or less. The use of the polycarbonate in a urethane modified resin used as an ingredient for the production of a toner or a developer. A urethane modified resin obtained by reacting a polymer mixture containing the polycarbonate and a polycondensed resin of glass transition point from 10 to 60° C. and hydroxyl group value from 20 to 100 mg KOH/g with a polyfunctional isocyanate compound wherein the ratio of polycarbonate to polycondensed resin is from 20:80 to 80:20 by weight and the molar ratio of isocyanate groups in the polyisocyanate compound to hydroxyl groups in the polymer mixture is from 0.4 to 1.2:1. A toner for electronic copying containing the urethane modified polycarbonate based resin. A developer containing the toner and optionally a carrier.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: October 21, 2014
    Assignee: BASF SE
    Inventors: Yoshihisa Fujii, Hiroyasu Kanno, Torii Yoshinori, Ema Kenji
  • Patent number: 8859176
    Abstract: A toner contains a binder resin and a polyalkylene, wherein the following formula is satisfied: 2?A/B?100 where A represents a reflectance at a light-receiving angle of +30° and B represents a reflectance at a light-receiving angle of ?30°, A and B being measured when a solid fixed image formed by the toner is irradiated with incident light at an incident angle of ?45° using a goniophotometer.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: October 14, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuo Kadokura, Masaru Takahashi, Shotaro Takahashi, Shuji Sato
  • Patent number: 8852834
    Abstract: To provide a toner, including: a crystalline binder resin including a urethane bond or a urea bond, or both thereof; and a colorant, wherein the colorant has a number-average particle diameter of 0.5 ?m or less, and a ratio of particles having a particle diameter of 0.7 ?m or greater in a number-size distribution of the colorant is 5% by number or less.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: October 7, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideyuki Santo, Shinya Nakayama, Atsushi Yamamoto, Daiki Yamashita, Suzuka Amemori
  • Patent number: 8828639
    Abstract: The invention provides a toner that is capable of low-temperature fixing even in high-speed electrophotographic processes while keeping the cleaning performance when used at high temperatures and the high-temperature storage stability. This toner having toner particles, each of which contains a binder resin and a colorant is characterized in that the temperature of Tp [° C.] when the loss elastic modulus obtained by dynamic viscoelastic measurements on the toner exhibits a maximum value in the temperature range from at least 30° C. to not more than 200° C., is from at least 40° C. to not more than 55° C., and in that, with G?(Tp) [Pa] being this maximum value, G?(Tp+15) [Pa] being the loss elastic modulus at the temperature of Tp+15 [° C.], and G?(Tp+30) [Pa] being the loss elastic modulus at the temperature of Tp+30 [° C.], G?(Tp), G?(Tp+15), and G?(Tp+30) satisfy prescribed relationships.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: September 9, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenta Kamikura, Kazumi Yoshizaki, Yasushi Katsuta, Kenichi Nakayama, Shiro Kuroki
  • Patent number: 8822121
    Abstract: A toner to develop an electrostatic charge image, a toner supply device employing the toner, an apparatus to form an image employing the toner, and a method of forming an image using the toner are provided. The toner includes at least a binder resin, a colorant, and a releasing agent. By using the binder resin including a combination of a reduced molar weight binder resin, an increased molar weight binder resin, and the releasing agent having an effecdtive compatibility with the binder resin together, the toner has accurately-controlled dynamic viscoelastic properties represented by a loss tangent. The toner to develop an electrostatic charge image according to an embodiment has development stability, development lifetime, fixability, charging stability, gloss, an anti-offset property, and heat storage ability at predetermined levels or higher.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: September 2, 2014
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventors: Kyeong Pang, Tae-hoe Koo, Su-bum Park, Yo-da Shin, Seung-jun Lee, Hae-ree Joo, Jun-young Lee
  • Patent number: 8815486
    Abstract: A carrier for a two-component developer, includes: magnetic particles and a resin coating layer that is coated on the magnetic particles, the resin coating layer containing metal nitride particles having a volume average primary particle diameter of from about 300 to about 2,000 nm.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: August 26, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Norihito Fukushima, Toshiaki Hasegawa, Yosuke Tsurumi
  • Patent number: 8795940
    Abstract: To provide a toner, including at least: a non-crystalline polyester resin; and a crystalline polyester resin, wherein the toner has a glass transition temperature in a first heating Tg1st and a glass transition temperature in a second heating Tg2nd, and a difference between Tg1st and Tg2nd (Tg1st-Tg2nd) is 10° C. or greater, and wherein the crystalline polyester resin is a modified crystalline polyester resin having a urethane skeleton or a urea skeleton, or both thereof.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: August 5, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita, Daisuke Asahina, Rintaro Takahashi, Masahide Yamada, Shinya Nakayama, Atsushi Yamamoto, Shingo Sakashita
  • Publication number: 20140199626
    Abstract: 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: Application
    Filed: January 10, 2014
    Publication date: July 17, 2014
    Applicant: Toshiba Tec Kabushiki Kaisha
    Inventors: TSUYOSHI ITOU, Kazuhisa Takeda, Yasuhito Noda, Takayasu Aoki, Masahiro Ikuta, Takafumi Hara, Motonari Udo
  • Patent number: 8778578
    Abstract: A toner set for electrophotography, including a black toner; a yellow toner; a magenta toner; a cyan toner; and a bright yellow toner, wherein the magenta toner includes a magenta colorant mainly including C.I. Pigment Red 122, the yellow toner has a hue angle of from 93 to 100° and the bright yellow toner has a hue angle of from 60 to 85° in L*a*b* color system.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: July 15, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazumi Suzuki, Tatsuya Morita, Shingo Sakashita
  • Patent number: 8778588
    Abstract: 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/cm2) G?(Tfb) satisfying G?(Tfb)?1×104 where Tfb is a flow onset temperature (° C.) of the low molecular weight resin component as measured by a capillary rheometer: A=|[(r1)?ln G?(r2)]/(T1?T2)|??Formula (1) (where T1 is temperature (° C.) at which storage elastic modulus G?(r1) is 1×105 (dyne/cm2) and T2 is temperature (° C.) at which storage elastic modulus G?(r2) is 1×103 (dyne/cm2) as measured by means of a viscoelasticity measuring device with measuring frequency of 1 Hz, and measuring distortion of 1 deg; and | | represents an absolute value.).
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: July 15, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Teruki Kusahara, Junichi Awamura, Tsuyoshi Sugimoto, Hyo Shu, Tomomi Suzuki, Osamu Uchinokura, Takahiro Honda, Satoshi Kojima, Satoshi Ogawa, Daisuke Inoue, Koshi Sato, Daisuke Ito, Ryuuta Yoshida, Syouko Satoh
  • Patent number: 8778585
    Abstract: A toner with good low-temperature fixability even in light-pressure type fixing units, which causes no contamination of fixing films and provides images having stable image densities and excellent image quality after long-term use. The toner includes a toner particle containing a binder resin, a coloring agent, a release agents (a) and (b) The release agent (a) is a monofunctional or bifunctional ester wax; the release agent (b) is a hydrocarbon wax; a solubility of the release agent (a) into the binder resin is higher than that of the release agent (b). When tetrahydrofuran-soluble components of the toner are subjected to GPC, a proportion of components having a molecular weight of 500 or less is 2.5 area % or less. When the tetrahydrofuran-soluble components at 25° C. are subjected to SEC-MALLS, a weight-average molecular weight Mw thereof is 5,000-100,000, and the Mw and the radius of gyration Rw thereof satisfy 5.0×10?4?Rw/Mw?1.0×10?2.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: July 15, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Matsui, Michihisa Magome, Tomohisa Sano, Shuichi Hiroko, Yoshitaka Suzumura, Shotaro Nomura
  • Patent number: 8758969
    Abstract: A method for producing an antenna structure for an RFID device, a dry toner for use in producing an antenna for an RFID device and a RFID device comprising an antenna structure made of fused toner are disclosed. In a method for producing an antenna structure for an RFID device, a dry toner comprising a polymeric binder and metallic particles is provided. The toner comprises particles having a resistance allowing triboelectric charging or a resistance allowing inductive charging, wherein said metallic particles are nanoparticles having a mean particle size below approximately 500 nm in at least one direction. In the method, a continuous layer of the dry toner is applied to a substrate in a desired shape of an antenna via an electrophotographic printing process, and subsequently the toner is fused to the substrate by heating the toner above its glass transformation temperature.
    Type: Grant
    Filed: December 22, 2007
    Date of Patent: June 24, 2014
    Assignee: Eastman Kodak Company
    Inventors: Detlef Schulze-Hagenest, Dinesh Tyagi
  • Patent number: 8741521
    Abstract: A toner containing toner particles, each toner particle containing: a releasing agent; a colorant; and a binder resin containing at least a crystalline polyester resin and a non-crystalline polyester resin, wherein in the case where a volume average particle diameter of the toner is defined as Dv, the toner contains a group of the toner particles having 4/5 Dv, and a group of the toner particles having 6/5 Dv, and wherein an endothermic value A of the crystalline polyester resin at a first temperature increase in DSC of the toner, an endothermic value B of the crystalline polyester resin at a first temperature increase in DSC of the group of the toner particle having 4/5 Dv, and an endothermic value C of the crystalline polyester resin at a first temperature increase in DSC of the group of the toner particles having 6/5 Dv satisfy the relation represented by the following formulas: 50<(B/A)×100<90, and 110<(C/A)×100<150.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: June 3, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Mamoru Hozumi, Tsuyoshi Sugimoto, Naohiro Watanabe, Tomoyuki Satoh, Shinya Hanatani, Osamu Uchinokura, Kiwako Hirohara
  • Patent number: 8741525
    Abstract: The resin coated carrier is used with a toner in which an external additive having an average primary particle size of 50 nm or more is added to a toner particle, and has a carrier core and a resin coating layer on the surface of the carrier core. In the resin coated carrier, the following expression (1) is satisfied: 0.5??log {(A/C)/(B/C)}?2.5??(1) wherein A represents a volume resistance value (?/cm) of the resin coated carrier in an electric field of 1000 V/cm that is obtained by conducting a stirring test, B represents a volume resistance value (?/cm) of the resin coated carrier in an electric field of 1000 V/cm before the stirring test, and C represents a volume resistance value (?/cm) of the carrier core in an electric field of 1000 V/cm.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: June 3, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Osamu Wada, Takanori Kamoto, Tadashi Iwamatsu, Nobuyuki Yoshioka, Hiroyuki Hirakawa, Yoshinori Mutoh, Takashi Hara, Hirofumi Kanda, Yoshio Ichii
  • Publication number: 20140147779
    Abstract: A toner is provided. The toner includes a crystalline resin and a non-crystalline resin, and has a thermal property such that when the toner is heated after being firstly heated to 60° C. followed by cooling in differential scanning calorimetry (DSC), the toner has a clear peak specific to melting of the crystalline resin at a temperature T1, and when the toner is heated after being firstly heated to 80° C. followed by cooling in the differential scanning calorimetry (DSC), the toner does not have a clear peak specific to melting of the crystalline resin at a temperature not higher than the temperature T1.
    Type: Application
    Filed: October 1, 2013
    Publication date: May 29, 2014
    Inventors: Kazuoki FUWA, Takuya KADOTA, Yoshihiro MIKURIYA, Tsuyoshi NOZAKI, Yoshimichi ISHIKAWA, Yuta TAKEUCHI, Tomohiro FUKAO, Tomoharu MIKI, Takayuki NAKAMURA
  • Publication number: 20140141370
    Abstract: Provided is a suitable toner external additive which has an excellent spacer effect, without causing image defects in repeated image formation and which is suitable in preparing a toner with stable printing properties and to provide a fine spherical silica powder suitable for adding to the toner additive. A fine spherical silica power having an average particle size measured by a laser diffraction/scattering distribution measuring apparatus of 0.090 ?m or more and 0.140 ?m or less, a particle content ratio of 5.0% by mass or more and 25.0% by mass or less when the particle diameter is 0.150 ?m or more, and a particle content ratio of 1.0% by mass or less when the particle diameter is 0.300 ?m or more.
    Type: Application
    Filed: January 28, 2014
    Publication date: May 22, 2014
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Shuji SASAKI, Masaaki HIDESHIMA, Hideaki SONODA, Takahisa MIZUMOTO