Dry Multicolor Toner (i.e., Composition Containing More Than One Colored Toner (e.g., Cyan, Magenta, And Yellow Toners, Etc.)) With Chemically Identified Colorant Or Colorant Identified By Color Patents (Class 430/107.1)
  • Patent number: 10295923
    Abstract: An electrostatic latent image developing toner includes toner particles each including a toner core and a shell layer covering a surface of the toner core. The shell layer contains a hydrophilic thermosetting resin and a hydrophobic thermoplastic resin. The hydrophobic thermoplastic resin is exposed at surfaces of the toner particles. In a preferable configuration of the shell layer, a plurality of blocks substantially formed from the hydrophobic thermoplastic resin are connected to one another through a junction portion substantially formed from the hydrophilic thermosetting resin.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: May 21, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Masami Tsujihiro, Jun Hioki, Haruhiro Nishitera, Ryotaro Komada
  • Patent number: 10203621
    Abstract: An image forming method includes using yellow toner, magenta toner, cyan toner, and black toner in which each of the yellow toner, the magenta toner, the cyan toner, and the black toner includes a crystalline polyester resin having a constitutional unit derived from a linear chain aliphatic diol, an amorphous resin, a colorant, and a releasing agent. A carbon number of a linear chain aliphatic diol component forming the crystalline polyester resin contained in the black toner is 6 or more, and a carbon number of a linear chain aliphatic diol component forming the crystalline polyester resin contained in each of the yellow toner, the magenta toner, and the cyan toner is 3 or more and 5 or less.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: February 12, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kenshi Miyajima, Noboru Ueda, Kouji Sugama, Natsuki Ito, Yohei Ohno, Hidehito Haruki, Keisuke Asano
  • Patent number: 10175594
    Abstract: There is provided a toner set including a yellow toner, a cyan toner and a magenta toner, the toners each comprising an external additive and colored resin particles comprising a binder resin, a colorant and a charge control agent. An absolute value of an average of q/d for any of the yellow, cyan and magenta toners is expressed by charge amount q (fC) and particle diameter d (?m). It is obtained by measurement using an electric field detachment-type charge amount distribution measurement device. It is in a range of 2.0 to 6.5 fC/10 ?m, and a standard deviation (SD) of q/d is 13 fC/10 ?m or less. A difference between average values of q/d for any two of the yellow, cyan and magenta toners is 2.0 fC/10 ?m or less. A difference (?SD) between standard deviations of q/d for the two toners is 5.0 fC/10 ?m or less.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: January 8, 2019
    Assignee: ZEON CORPORATION
    Inventors: Hiroshi Nakatani, Takeru Chiba
  • Patent number: 10139744
    Abstract: An electrostatic latent image developing toner includes toner particles each including a toner core (10) and a shell layer (20) covering a surface of the toner core (10). The shell layer (20) contains a hydrophilic thermosetting resin and a hydrophobic thermoplastic resin. The hydrophilic thermosetting resin is a resin having at least one functional group selected from the group consisting of oxazoline groups, carbodiimide groups, and isocyanate groups. The hydrophobic thermoplastic resin is exposed at surfaces of the toner particle.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: November 27, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Jun Hioki, Ryotaro Komada, Haruhiro Nishitera, Yusuke Washino
  • Patent number: 9946182
    Abstract: An electrostatic charge image developing toner includes toner particles including a binder resin and a white pigment, wherein a maximum frequent value in distribution of eccentricity B of the white pigment represented by the following Expression (1) is from 0.75 to 0.95, and a skewness in the distribution of the eccentricity B is from ?1.20 to 0.00: Expression (1): eccentricity B=2d/D, wherein D represents an equivalent circle diameter (?m) of a toner particle in observation of the cross section of the toner particle, and d represents a distance (?m) from the centroid of the toner particle to the centroid of the white pigment in observation of the cross section of the toner particle.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: April 17, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tsuyoshi Murakami, Atsushi Sugawara, Kana Yoshida, Masaki Iwase
  • Patent number: 9921508
    Abstract: Provided is a method of preparing a poly-silicic-ferric coagulant (PSFC) having a controlled aggregating strength. In particular, according to an embodiment, provided is a method of preparing a PSFC that may effectively suppress both formation of fine toner particles having a particle size that is smaller than a desired particle size and formation of coarse toner particles having a particle size that is greater than the desired particle size, wherein the PSFC for a toner is used in preparation of a toner by using an emulsion aggregation (EA) method. The PSFC for a toner prepared by using the method, according to an embodiment, significantly exhibits a controlled aggregating strength, and thus a viscosity of an emulsion aggregation solution for the toner preparation is appropriate, which results in suppressing production of fine toner particles and coarse toner particles. In this regard, a toner preparation yield may improve.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: March 20, 2018
    Assignee: S-PRINTING SOLUTION CO., LTD.
    Inventors: Sung-hwa Lee, Il-hyuk Kim, Yeong-sik Mun
  • Patent number: 9841693
    Abstract: A brilliant toner includes release agent domains meeting conditions (1) a length of the release agent domain in a longitudinal axis direction is 300 nm to 1,500 nm, (2) a ratio between the length in the longitudinal axis direction and in a short axis direction of the release agent domain is 3.0 to 15.0, (3) an angle between (a) a tangent line passing through a contact point of (a1) a circumference of a circle that is centered at a centroid of the release agent domain and is inscribed in an outer edge of the toner particle and (a2) the outer edge and (b) a line passing through the centroid and extending in the longitudinal axis direction is 0° to 45°, and (4) a ratio of a distance between the centroid and the contact point to an equivalent circle diameter of the toner particle is 0.03 to 0.25.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: December 12, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Atsushi Sugawara, Sakiko Hirai, Masaru Takahashi, Satomi Hara
  • Patent number: 9835962
    Abstract: There is provided an electrostatic image-developing toner containing a binder resin, a coloring agent and a release agent having a melting temperature of 85° C. to 120° C., the toner having a sea-island structure involving a sea part containing the binder resin and an island part containing the release agent, wherein a mode value of the distribution of the eccentricity degree B of the release agent-containing island part, represented by the specific formula, is from 0.75 to 1.00 and a skewness of the distribution of the eccentricity degree B is from ?1.30 to ?0.50.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: December 5, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Satoshi Kamiwaki, Akira Matsumoto, Tsuyoshi Murakami, Satoshi Miura, Atsushi Sugawara, Yukiaki Nakamura, Kana Yoshida, Yutaka Saito, Sakon Takahashi, Yasuaki Hashimoto, Koji Sasaki, Tsutomu Furuta
  • Patent number: 9811014
    Abstract: Provided is a toner having high coloring power and being excellent in light fastness. Specifically, provided is a yellow toner, including at least: a binder resin; a wax; and a colorant, in which the colorant contains a compound represented by the general formula (1).
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: November 7, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shosei Mori, Takeshi Sekiguchi, Taichi Shintou, Takeshi Miyazaki
  • Patent number: 9778583
    Abstract: A toner having compatibility between transfer properties and cleaning properties is provided. A toner wherein a fine particle A containing a primary particle having a number average particle diameter (D1) of 80 nm or more and 400 nm or less is present on the surface of a toner particle at a coverage ratio of 5 to 40%, a fixing rate of 30 to 90% by mass, and a variation coefficient of 0.1 to 0.5 in a region of 0.5 ??m2.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: October 3, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazuo Terauchi, Yojiro Hotta, Takeshi Naka, Motohide Shiozawa, Shohei Tsuda, Masami Fujimoto
  • Patent number: 9726996
    Abstract: A white toner includes white toner particles and black toner particles, wherein a content of the black toner particles is from 0.01% by number to less than 1% by number with respect to a total number of an entirety of toner particles.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: August 8, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Satoshi Kamiwaki, Tetsuya Taguchi, Shotaro Takahashi, Masaru Takahashi
  • Patent number: 9720339
    Abstract: A toner including at least a crystalline resin as a binder resin, wherein a tetrahydrofuran soluble content of the toner includes 5.0% or more as a peak area of a component having a molecular weight of 100,000 or greater in a molecular weight distribution measured by gel permeation chromatography, and the tetrahydrofuran soluble content of the toner has a weight-average molecular weight of 20,000 to 60,000.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: August 1, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Shingo Sakashita, Shinya Nakayama, Masahide Yamada, Atsushi Yamamoto, Hideyuki Santo, Yukiko Nakajima, Suzuka Amemori
  • Patent number: 9665025
    Abstract: An object to be achieved by embodiments is to provide a toner having excellent color reproducibility, light resistance, coloring power, low-temperature fixability, storage stability, and long life property, a method for producing the same, a toner cartridge, and an image forming apparatus. A toner according to an embodiment includes toner particles containing a coloring agent, a binder resin, and a specific ester wax. The coloring agent contains at least one pigment (X) selected from C.I. Pigment Red 48, C.I. Pigment Red 48:1, C.I. Pigment Red 48:2, C.I. Pigment Red 48:3, C.I. Pigment Red 48:4, and C.I. Pigment Red 48:5, and C.I. Pigment Red 122 (Y), and the mass ratio of the component (X) to the component (Y) is from 30:70 to 60:40.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: May 30, 2017
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Shiho Moriya
  • Patent number: 9665024
    Abstract: According to embodiments, there are provided a toner having excellent color reproducibility, light resistance, coloring power, low-temperature fixability, storage stability, and long life property, a method for producing the same, a toner cartridge, and an image forming apparatus. A toner according to an embodiment includes toner particles containing a coloring agent, a binder resin, and a specific ester wax. The coloring agent contains at least one pigment (X) selected from C.I. Pigment Red 48, C.I. Pigment Red 48:1, C.I. Pigment Red 48:2, C.I. Pigment Red 48:3, C.I. Pigment Red 48:4, and C.I. Pigment Red 48:5, and C.I. Pigment Red 122 (Y), and the mass ratio of the component (X) to the component (Y) is as follows: X:Y=30:70 to 60:40.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: May 30, 2017
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Shiho Moriya
  • Patent number: 9618866
    Abstract: A developer includes a binder resin, a releasing agent; and a brilliant pigment. A peak endothermic amount of the developer measured using a differential scanning calorimetry (DSC) in a second temperature rising process is in a range from 6.20 to 14.40 J/g.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: April 11, 2017
    Assignee: Oki Data Corporation
    Inventor: Hideharu Kuwabara
  • Patent number: 9557671
    Abstract: A toner, including: base particles containing a polyester resin, a colorant, and a release agent, wherein the toner has a glass transition temperature (Tg1st) of 20° C. to 50° C. where the glass transition temperature (Tg1st) is measured in first heating of differential scanning calorimetry (DSC) of the toner, wherein tetrahydrofuran (THF) insoluble matter of the toner has a glass transition temperature [Tg2nd (THF insoluble matter)] of 30° C. or lower where the glass transition temperature [Tg2nd (THF insoluble to matter)] is measured in second heating of differential scanning calorimetry (DSC) of the THF insoluble matter, and wherein 50% or less of the colorant is present within a region of 1,000 nm from a surface of each of the base particles toward a center thereof.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: January 31, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryuta Chiba, Shinya Nakayama, Hiroshi Yamada, Minoru Masuda, Akinori Saitoh, Hideyuki Santo, Shinsuke Nagai, Akihiro Takeyama, Hiroyuki Takeda, Tsuyoshi Sugimoto, Suzuka Amemori, Kohsuke Nagata
  • Patent number: 9508892
    Abstract: Nano-crystalline core and nano-crystalline shell pairings having group I-III-VI material nano-crystalline cores, and methods of fabricating nano-crystalline core and nano-crystalline shell pairings having group I-III-VI material nano-crystalline cores, are described. In an example, a semiconductor structure includes a nano-crystalline core composed of a group I-III-VI semiconductor material. A nano-crystalline shell composed of a second, different, group I-III-VI semiconductor material at least partially surrounds the nano-crystalline core.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: November 29, 2016
    Assignee: Pacific Light Technologies Corp.
    Inventors: Steven M. Hughes, Juanita N. Kurtin
  • Patent number: 9187692
    Abstract: Nano-crystalline core and nano-crystalline shell pairings having group I-III-VI material nano-crystalline cores, and methods of fabricating nano-crystalline core and nano-crystalline shell pairings having group I-III-VI material nano-crystalline cores, are described. In an example, a semiconductor structure includes a nano-crystalline core composed of a group I-III-VI semiconductor material. A nano-crystalline shell composed of a second, different, semiconductor material at least partially surrounds the nano-crystalline core. In one specific example, the nano-crystalline core/nano-crystalline shell pairing has a photoluminescence quantum yield (PLQY) of greater than 60%. In another specific example, the nano-crystalline core/nano-crystalline shell pairing is a Type I hetero-structure.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: November 17, 2015
    Assignee: Pacific Light Technologies Corp.
    Inventors: Steven M. Hughes, Juanita N. Kurtin
  • 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: 20150104740
    Abstract: Toners of respective colors of a full-color toner set each contain a binder resin which is polyester resin; and a release agent dispersing aid which is styrene acrylic copolymer resin having at least one of an ?-methylstyrene structure and a styrene structure. The styrene acrylic copolymer resin is contained in an amount of 7 parts by weight to 14 parts by weight with respect to 100 parts by weight of the polyester resin. The full-color toner set has a sum of resistivities of the toners of the respective colors of 410×109 to 510×109 (?·cm).
    Type: Application
    Filed: March 8, 2013
    Publication date: April 16, 2015
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Shintaro Fukuoka, Tadayuki Sawai, Yoritaka Tsubaki, Keigo Mitamura, Yui Kawano, Keiichi Kikawa
  • Patent number: 8962228
    Abstract: A low melt or ultra low melt toner includes at least one amorphous polyester of an alkoxylated bisphenol based polyester, a crystalline polyester derived from the reaction of an aliphatic dicarboxylic acid or aromatic dicarboxylic acid with an aliphatic diol, at least one colorant and at least one fluorescence agent. Methods of authentication of the toner, of authentication of documents formed from the toner, of embedding information in documents, and the like are also set forth.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: February 24, 2015
    Assignee: Xerox Corporation
    Inventors: Gabriel Iftime, Karen A. Moffat, Jordan H. Wosnick, Eric Rotberg, Cuong Vong, Richard P. N. Veregin, Peter M. Kazmaier
  • Publication number: 20150024312
    Abstract: A toner, including: a binder resin; and a colorant, wherein the toner has a storage modulus of 1.0×107 Pa or more at 50° C., a loss modulus of 8.0×104 Pa to 2.0×105 Pa at 80° C., and a loss modulus of 2.0×102 Pa to 1.0×103 Pa at 160° C.
    Type: Application
    Filed: February 28, 2013
    Publication date: January 22, 2015
    Inventors: Masana Shiba, Hiroshi Yamashita, Tsuyoshi Sugimoto, Daisuke Asahina, Yukari Fukuda, Rintaro Takahashi, Satoyuki Sekiguchi
  • Publication number: 20150023690
    Abstract: A toner set for electrostatic image development includes a cyan toner, a magenta toner, and a yellow toner, wherein the Vicat softening temperatures of the toners are respectively in the range of from about 30° C. to about 60° C., and among the toners, the difference between the Vicat softening temperature of the toner having the highest Vicat softening temperature and the Vicat softening temperature of the toner having the lowest Vicat softening temperature is from about 1° C. to about 5° C.
    Type: Application
    Filed: September 17, 2014
    Publication date: January 22, 2015
    Inventor: Hiroko KOBAYASHI
  • Patent number: 8936893
    Abstract: A fluorescing yellow polymeric toner particle comprises one or more non-fluorescing yellow colorants, and one or more fluorescing yellow colorants having one or more emission peak wavelengths of at least 480 nm and up to and including 600 nm. These fluorescing yellow polymeric toner particles can be used to provide multicolor toner images with increased yellow color gamut.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 20, 2015
    Assignee: Eastman Kodak Company
    Inventors: Dinesh Tyagi, Chung-Hui Kuo, Louise Granica
  • Patent number: 8916317
    Abstract: The present disclosure provides toners and processes for making said toners. In embodiments, the toners are invisible when viewed under natural light, but possess a fluorescent agent that renders them visible when exposed to UV light of a specific wavelength. In other embodiments the toners have a color under natural light, and a different color when exposed to UV light.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: December 23, 2014
    Assignee: Xerox Corporation
    Inventors: Gabriel Iftime, Jordan H. Wosnick, Eric Rotberg, Cuong Vong, Edward Graham Zwartz, Richard P. N. Veregin, Karen Ann Moffat, Peter M. Kazmaier
  • Patent number: 8865383
    Abstract: A toner comprising an amorphous polyester, a crystalline polyester that is forming domains in the toner, and a colorant that is being dispersed at least in the domains of the crystalline polyester. The toner may be obtained by dispersing an oil phase including the amorphous polyester or a precursor capable of producing the amorphous polyester, the crystalline polyester, the colorant, and an organic solvent, in an aqueous medium to prepare an O/W dispersion, the oil phase; and removing the organic solvent from the O/W dispersion.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: October 21, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazumi Suzuki, Tatsuya Morita, Shingo Sakashita, Tsuyoshi Sugimoto
  • Patent number: 8828633
    Abstract: To obtain a toner which has excellent charge rise and stability, tends to have a sharp charge distribution, has excellent pigment dispersion properties, exhibits no disarray in an image even during a high-speed copying operation, and can stably output high-resolution images. A toner comprising toner particle containing a binder resin, a colorant, resin PA, and resin PB, wherein the resin PA has unit A represented by Formula (1), the resin PB has unit B represented by Formula (2), a content “a” of the unit A in the toner particle is 2.00 ?mol/g or more, and a molar ratio b/a of the content “a” and a content “b” of the unit B in the toner particle is 0.10 or more and 10.00 or less.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: September 9, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hitoshi Itabashi, Takashi Kenmoku, Harumi Takada
  • Patent number: 8815483
    Abstract: A magenta toner includes a binder resin containing a polyester resin having a dodecenylsuccinic acid structure as a constituent unit, and a solid solution of C.I. Pigment Violet 19 and C.I. Pigment Red 122, the magenta toner having an amount of the solid solution of from 2% by mass to 30% by mass based on the total mass of the toner.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: August 26, 2014
    Assignee: Fuji Xerox., Ltd.
    Inventors: Akira Matsumoto, Yusuke Ikeda, Eiji Nakai
  • Publication number: 20140227639
    Abstract: A violet toner includes toner particles that contain a binder resin including an amorphous polyester resin composed of a polycondensate of a polyol and a polyvalent carboxylic acid including a trimellitic acid, and C.I. Pigment Violet 37, wherein a molar ratio of the trimellitic acid is from 0.1 mol % to 10 mol % with respect to the entire polymerization components of the amorphous polyester resin, and a content of C.I. Pigment Violet 37 is from 1% by weight to 20% by weight with respect to the total weight of the toner particles.
    Type: Application
    Filed: October 11, 2013
    Publication date: August 14, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Akira MATSUMOTO, Yukiaki NAKAMURA
  • 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
  • Publication number: 20140193751
    Abstract: Provided is a toner set including a brilliant toner containing a brilliant pigment and at least one kind of color toner containing a colorant, in which a ratio (G? A/G?B) of G?A to G?B satisfies a relationship of 1?G?A/G?B?10, when a storage modulus in 120° C. of the brilliant toner is G?A and a storage modulus in 120° C. of the color toner is G?B.
    Type: Application
    Filed: July 17, 2013
    Publication date: July 10, 2014
    Inventors: Atsushi SUGITATE, Masaru TAKAHASHI, Shotaro TAKAHASHI, Sakiko HIRAI, Shuji SATO
  • Patent number: 8771911
    Abstract: A magenta toner for electrophotography, including: toner particles containing, a polyester resin, a coloring agent containing a solid solution of C.I. Pigment Violet 19 and C.I. Pigment Red 122, a release agent, and inorganic particles; and an external additive, wherein an average particle diameter of the inorganic particle is 0.75 times or more the average particle diameter of the coloring agent.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: July 8, 2014
    Assignee: Fuji Xerox, Co., Ltd.
    Inventors: Satoshi Kamiwaki, Akira Matsumoto, Yusuke Ikeda, Yukiaki Nakamura, Masanobu Ninomiya
  • Patent number: 8771915
    Abstract: An image forming method is disclosed, comprising transferring and fixing steps, wherein fixing is performed by a fixing device in which at least one of a heating member and a pressing member comprises an endless belt entrained about plural rollers, and the heating member and the pressing member are pressed against each other to form a fixing nip, and wherein toner particles contains a binder resin which has a domain/matrix structure constituted of a high-elastic resin forming a domain and a low-elastic resin forming a matrix in an elastic image obtained when observing the toner particles by an atomic force microscope with respect to a section of the individual toner particles, in which an arithmetic average value of a ratio (L/W) of a major axis (L) to a minor axis (W) of individual domains is 1.5 to 5.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: July 8, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Noboru Ueda, Hiroshi Nagasawa, Anju Hori
  • Patent number: 8741523
    Abstract: A toner for developing electrostatic image comprising a toner particle containing a binding resin is disclosed. which, and In the toner the binding resin has a domain-matrix structure composed of a high elastic resin composing a domain and a low elastic resin composing a matrix, an arithmetic mean value of ratio (L/W) of the Length L to Width W of the domains is 1.5 to 5.0, domains having Length L in the range of 60 to 500 nm exist 80 number % or more, and domains having Width Win the range of 45 to 100 nm exist 80 number % or more, in a viscoelastic image of a cross section of the toner particle observed via an atomic force microscope.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: June 3, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Anju Hori, Noboru Ueda, Hiroshi Nagasawa
  • Publication number: 20140147781
    Abstract: The present disclosure describes hyperpigmented toner compositions containing a mixture of insulative color pigments, which toners exhibit reduced dielectric loss and improved tribo-charging.
    Type: Application
    Filed: November 28, 2012
    Publication date: May 29, 2014
    Applicant: XEROX CORPORATION
    Inventors: Richard P.N. Veregin, Daryl W. Vanbesien, Suxia Yang, Majid Kamel, Cuong Vong
  • Patent number: 8735033
    Abstract: 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: Grant
    Filed: March 29, 2012
    Date of Patent: May 27, 2014
    Assignee: Xerox Corporation
    Inventors: Yulin Wang, Kimberly Nosella, David Kurceba, Santiago Faucher
  • Patent number: 8728696
    Abstract: A toner including a binder resin, a colorant, and a release agent is provided. The toner has a peak loss tangent (tan ?) value of 3 or more within a temperature range of 80 to 160° C. Here, the loss tangent (tan ?) is a ratio (G?/G?) of a loss elastic modulus (G?) to a storage elastic modulus (G?). The toner provides a good combination of low-temperature fixability, hot offset resistance, storage stability, coloring power and/or opacifying power, and gloss.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: May 20, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Saori Yamada, Mitsuo Aoki, Hisashi Nakajima, Masashi Nagayama, Shigenori Yaguchi
  • Publication number: 20140134528
    Abstract: Toner for developing an electrostatic latent image contains toner particles, the toner particles contain a resin and a pigment, the pigment includes a first pigment, a second pigment, and a third pigment, the first pigment is carbon black, the second pigment is C.I. Pigment Brown 23 and/or C.I. Pigment Brown 25, and the third pigment is nigrosine.
    Type: Application
    Filed: November 7, 2013
    Publication date: May 15, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Chiaki Yamada, Masahiro Anno
  • Publication number: 20140134529
    Abstract: Toner for developing an electrostatic latent image contains toner particles, the toner particles contain a resin and a pigment, the pigment includes a first pigment and a second pigment, the first pigment is carbon black, and the second pigment is C. I. Pigment Brown 23 and/or C. I. Pigment Brown 25.
    Type: Application
    Filed: November 7, 2013
    Publication date: May 15, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Chiaki YAMADA, Masahiro Anno
  • Publication number: 20140127619
    Abstract: Red toners that approximate PANTONE® Red 032 and PANTONE® Warm Red are described. The colorant includes an orange colorant and a red colorant, where the orange colorant absorbs light having a wavelength of from about 400 to about 520 nm, and where the red colorant absorbs light having a wavelength of from about 500 to 580 nm.
    Type: Application
    Filed: November 2, 2012
    Publication date: May 8, 2014
    Applicant: XEROX CORPORATION
    Inventors: Valerie M. Farrugia, Jordan H. Wosnick, Eric Rotberg, Karen A. Moffat, Richard PN Veregin, Suxia Yang, C Geoffrey Allen
  • Patent number: 8691485
    Abstract: The present disclosure provides toners and methods for their production. In embodiments, the toner may include a core/shell configuration, with a non-crosslinked resin and a crosslinked resin in the core, with a second non-crosslinked resin in the shell, pigment/pigments and a wax possessing both branched and linear carbons.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: April 8, 2014
    Assignee: Xerox Corporation
    Inventors: Daniel W. Asarese, Grazyna E. Kmiecik-Lawrynowicz, Samir Kumar, Maura A. Sweeney, Siddhesh N. Pawar, Robert D. Bayley
  • Patent number: 8663884
    Abstract: An orange toner for developing electrostatic charge images includes a binder resin; and a colorant including a first color material and a second color material; wherein the first color material has a hue angle of ?20° to 80° in a L*a*b* color system, the second color material includes C.I. Solvent Orange 63, and the second color material has a content of 0.05 to 0.2 parts by mass to 100 parts by mass of the binder resin.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: March 4, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yohei Ohno, Kaori Soeda, Miyuki Murakami
  • Patent number: 8652719
    Abstract: A set of toners including yellow, cyan, magenta, and black toner, each of which containing a binder resin containing a crystalline resin and a non-crystalline resin, a releasing agent, and a corresponding coloring agent, wherein the following relationship is satisfied: 0.8<EBk/EFc<0.95, where EBk represents the amount of heat of melting (mJ/mg) for the black toner and EFc represents the average amount of heat of melting (mJ/mg) of the yellow toner, magenta toner, and cyan toner from 50° C. to 100° C. at the first temperature rising in differential scanning calorimetry (DSC).
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: February 18, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Osamu Uchinokura, Satoshi Ogawa, Junichi Awamura, Teruki Kusahara, Daisuke Ito, Daisuke Inoue
  • Publication number: 20140023964
    Abstract: Provided is a toner set including at least a first brilliant toner that contains a brilliant pigment, and a second brilliant toner that contains a brilliant pigment and exhibits a different color from the first brilliant toner.
    Type: Application
    Filed: April 2, 2013
    Publication date: January 23, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Sakiko HIRAI, Shotaro TAKAHASHI, Masaru TAKAHASHI, Atsushi SUGITATE, Shuji SATO
  • Patent number: 8632932
    Abstract: A toner including a binder resin comprising a resin (a) comprising a polyhydroxycarboxylic acid skeleton formed from an optically-active monomer. The polyhydroxycarboxylic acid skeleton has a weight average molecular weight of from 7,000 to 60,000. The binder resin comprises the polyhydroxycarboxylic acid skeleton in an amount of from 10 to 90% by weight. The optical purity X (%) of the polyhydroxycarboxylic acid skeleton represented by the following formula is 80% or less: X(%)=|X(L-isomer)?X(D-isomer)| wherein X(L-isomer) and X(D-isomer) represent molar ratio (%) of L-isomer and D-isomer of the optically-active monomer, respectively.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: January 21, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Akiyoshi Sabu, Akihiro Kotsugai, Ryota Inoue, Keiko Osaka, Shingo Sakashita, Yukiko Nakajima, Satoshi Mochizuki
  • Patent number: 8592112
    Abstract: An orange toner including a binder resin containing a polyester resin having a dodecenyl succinic acid structure as a constituent unit; and C.I. Pigment Orange 38 in a blending amount of from 5% by mass to 18% by mass relative to the whole mass of the toner and a toner storage container for storing the same, an orange developer and a process cartridge for storing the same, a color toner set, and an image forming apparatus.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: November 26, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Yoshida, Akira Matsumoto, Masanobu Ninomiya, Yusuke Ikeda
  • Patent number: 8568947
    Abstract: Disclosed is a green toner for developing a static latent image containing a binder resin and a colorant, and the colorant contains C.I. Solvent Green 5 and colorant compound X represented by Formula (1), and content ratio of C.I. Solvent Green 5 in whole amount of the colorant is 5 to 50% by weight, in the Formula (1), M1 is a metal atom of Group 14, Q is independently a monovalent substituent, m and n are each 0 or 1, at least one of m and n is 1, and A is independently an atomic group forming an aromatic ring which may have a substituent.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: October 29, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yohei Ohno, Hajime Tadokoro, Kaori Matsushima, Hiroyuki Yasukawa, Ito Koga
  • Patent number: 8535864
    Abstract: A magenta toner including toner particles containing a colorant and a binder resin is provided. The colorant contains C.I. Pigment Red 122 and C.I. Pigment Yellow 180 and a mass ratio of the C.I. Pigment Red 122 and the C.I. Pigment Yellow 180 is in the range of 99:1 to 10000:1. The binder resin contains a polyester resin and a polyester resin having a repeating unit obtained from a Bisphenol A alkylene oxide adduct expressed by the following chemical formula is used as the polyester resin: wherein m and n independently represent an integer of 2 to 4, and x and y independently represent a positive number.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: September 17, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Eisuke Iwazaki, Yuki Takamiya, Satoshi Inoue
  • Patent number: 8507165
    Abstract: Black particles include a black pigment; and a cyan pigment, wherein when the reflectance to light of wavelength of 420 nm and the reflectance to light of wavelength of 770 nm of plural samples are measured, the standard deviations (1?) of the measured values are about 1 or less with respect to both wavelengths.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: August 13, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Shigeru Seitoku
  • Patent number: 8492060
    Abstract: Provided are a method of forming a toner image and an electrophotographic image forming apparatus including a toner. The method of forming a toner image is performed using a first toner having a yellow color and color coordinate values of a lightness (L) ranging from 91 to 94, a redness (a) ranging from ?11 to ?9, and a yellowness (b) ranging from 77 to 82; a second toner having a magenta color and color coordinate values of a lightness (L) ranging from 56 to 61, a redness (a) ranging from 56 to 61, and a yellowness (b) ranging from ?7 to ?5; and a third toner having a cyan color and color coordinate values of a lightness (L) ranging from 58 to 62, a redness (a) ranging from ?33 to ?30, and a yellowness (b) ranging from ?42 to ?37.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: July 23, 2013
    Assignee: Samsung Fine Chemicals Co., Ltd.
    Inventors: Dae Woong Choi, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn