Inorganic Silicon Compound Adjuvant Patents (Class 430/108.7)
  • Patent number: 10928745
    Abstract: An electrostatic charge image developing toner includes: toner particles including an amorphous resin and a crystalline polyester resin including a polycondensate of a linear dicarboxylic acid and a linear dialcohol having 2 to 12 carbon atoms; and an external additive including silica particles having a BET specific surface area of 100 m2/g or more. The electrostatic charge image developing toner satisfies the expression: 0.05??H2/?H1?0.95, wherein ?H1 (mW/g) is an endothermic energy amount based on an endothermic peak derived from the crystalline polyester resin in a first temperature increase process in differential scanning calorimetry according to ASTM D3418-8 (2008), and ?H2 (mW/g) is an endothermic energy amount based on an endothermic peak derived from the crystalline polyester resin in a second temperature increase process in differential scanning calorimetry according to ASTM D3418-8 (2008).
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: February 23, 2021
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Satoshi Miura, Yoshimasa Fujihara, Shintaro Anno, Daisuke Noguchi, Takuro Watanabe
  • Patent number: 10845722
    Abstract: A toner comprising an external additive and a toner particle including a binder resin, a colorant and inorganic fine particles A, wherein the external additive contains an external additive B, a number average particle diameter of primary particles of the external additive B is 30 to 200 nm, an adhesion index of the external additive B to the toner particle is 0.00 to 3.00, a number average particle diameter of primary particles of the inorganic fine particles A is greater than that of the external additive B, and in SEM observations of the toner under specific condition, the number of particles (Na) of the external additive B in a 2 ?m square region of the toner surface and the number of particles (Nb) of the external additive B observed in a state of overlapping with the inorganic fine particles A in the region satisfy Nb/Na of 0.20 or more.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: November 24, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koji Nishikawa, Kosuke Fukudome, Takaaki Furui, Tetsuya Kinumatsu
  • Patent number: 10768540
    Abstract: Provided is an external additive having a resin particle containing a crystalline resin, and an inorganic fine particle containing a metal atom, the inorganic fine particle being embedded in the resin particle, wherein part of the inorganic fine particle being exposed on a surface of the resin particle, the maximum endothermic peak temperature of the external additive during a first temperature rise is from 50.0° C. to 120° C., the shape factor SF-2 of the external additive is from 110 to 150, and the external additive satisfies following formulae (1) and (2) below, in which Za (mass %) is the percentage content of a metal atom contained in the inorganic fine particle on the surface of the external additive in X-ray photoelectron spectroscopy, and Zb (mass %) is the percentage content of the metal atom in thermogravimetric analysis of the external additive, Za?15??(1), and Za/Zb?0.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: September 8, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shuntaro Watanabe, Tatsuya Saeki, Atsuhiko Ohmori, Shuhei Moribe, Hiroki Akiyama, Kazumichi Nakahama, Katsuhisa Yamazaki
  • Patent number: 10745508
    Abstract: Surface-modified metal oxide particles, includes: a metal oxide particle having a refractive index of at least 1.9 to light having a wavelength of 589 nm; a first surface-modifying group having a group represented by formula (A1); and a second surface-modifying group having a group represented by formula (A2). R1 is a hydrogen atom or a C1-4 hydrocarbon group; n is an integer of from 1 to 20, m is an integer of at least 3 and at most (2n+1); a is an integer of from 0 to 2; R3 is a hydrogen atom or a methyl group; R4 is a hydrogen atom or a C1-4 hydrocarbon group; X is —O— or —NH—; b is an integer of from 2 to 10; and c is an integer of from 0 to 2.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: August 18, 2020
    Assignee: AGC Inc.
    Inventors: Keisuke Takagi, Jun Yoshida, Hidenobu Murofushi
  • Patent number: 10678155
    Abstract: A toner comprising a toner particle that contains a toner base particle and an organosilicon polymer on a surface of the toner base particle, wherein the organosilicon polymer forms protruded portions with a prescribed structure on the surface of the toner base particle, and in the toner cross section, when the protrusion width w is the length of the segment where a protruded portion and the toner base particle form a continuous interface, the protrusion diameter D is the maximum length of a protruded portion, and the protrusion height H is the length from the peak of the protruded portion to the line along the circumference of the toner base particle surface, the numerical proportion of these protruded portions having a ratio D/w of the protrusion diameter D to the protrusion width w from 0.33 to 0.80, is a least 70 number %.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: June 9, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuhei Terui, Noriyoshi Umeda, Tomonori Matsunaga, Shohei Kototani, Masamichi Sato
  • Patent number: 10451989
    Abstract: Provided is a toner including toner base particles and an external additive, wherein each of the toner base particles includes a binder resin, a release agent, and silica, an average abundance ratio (Xsurf) of the silica on a region adjacent to a surface of the toner base particle is from 70% through 90%, and a projected area average value S(180) per particle of the toner when the toner is heated to 180° C. and a projected area average value S(30) per particle of the toner when the toner is 30° C. satisfy Formula (1) below, 1.4?S(180)/S(30)?1.7??Formula (1).
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: October 22, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Kojima, Satoshi Takahashi, Tatsuru Moritani, Shosuke Aoai, Tatsuki Yamaguchi
  • Patent number: 10394150
    Abstract: A positively chargeable toner includes 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 containing a binder resin and a shell layer covering a surface of the toner core. The external additive includes a plurality of silica particles. The silica particles are each present on a surface of the shell layer and include a silica base having a surface treated with a surface treatment agent. The surface treatment agent includes a first treatment agent having a carboxyl group in a molecule thereof. The toner core and each of the silica particles is bonded to each other through a specific covalent bond. An amount of ring-unopened oxazoline groups included in 1 g of the positively chargeable toner as measured by gas chromatography-mass spectrometry is at least 0.10 ?mol and no greater than 100 ?mol.
    Type: Grant
    Filed: October 8, 2018
    Date of Patent: August 27, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Ryotaro Komada
  • Patent number: 10379454
    Abstract: An electrostatic latent image developing toner has positive chargeability and includes a plurality of toner particles. The toner particles each include primary domains made from a primary mixture. The primary mixture contains a wax and an antioxidant. The antioxidant is contained in an amount of at least 1.8 parts by mass and no greater than 15.8 parts by mass relative to 100 parts by mass of the primary mixture.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: August 13, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Akinori Koyama
  • Patent number: 10234780
    Abstract: A toner for developing an electrostatic charge image includes three or more elements selected from a group including an iron element, a silicon element, a sulfur element and a fluorine element and a binder resin including an amorphous polyester-based resin.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: March 19, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Akinori Terada, Keiichi Ishikawa, Kenichi Miyamoto, Masahide Yamada
  • Patent number: 10222716
    Abstract: An electrostatic latent image developing toner includes a plurality of toner particles (10) each including a toner mother particle (11) and an external additive adhering to a surface of the toner mother particle (11). The toner mother particles (11) contain a crystalline polyester resin and a non-crystalline polyester resin. The toner particles (10) include, as the external additive, crystal nucleating agent particles (13) containing a crystal nucleating agent for promoting crystallization of the crystalline polyester resin. On a differential scanning calorimetry spectrum of the toner before fixing, an endotherm quantity of a heat absorption peak originating from a crystalline region of the crystalline polyester resin is less than 2.0 mJ/mg. On a differential scanning calorimetry spectrum of the toner after fixing, an endotherm quantity of a heat absorption peak originating from a crystalline region of the crystalline polyester resin is at least 6.0 mJ/mg.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: March 5, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Haruhiro Nishitera
  • Patent number: 10168630
    Abstract: A toner for developing electrostatic images, including toner particles containing an external additive on surfaces of toner matrix particles. The external additive contains at least a lanthanum-containing titanate compound.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: January 1, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Satoshi Uchino, Shinya Obara, Futoshi Kadonome
  • Patent number: 9996017
    Abstract: An object of the present invention is to provide an electrostatic latent image developing toner containing: a binder resin; and a releasing agent, wherein the binder resin contains a crystalline polyester resin; an endothermic peak top temperature of the electrostatic latent image developing toner is 70° C. or more measured with differential scanning calorimetry (DSC) in a heating-up period of the toner; and a heat value ?Hc(L) is 15% or less with respect to a heat value ?Hc, wherein the heat value ?Hc(L) is a heat value in the range of (an exothermic peak top temperature rc?7° C.) or less; and the heat value ?Hc is a heat value of the total exothermic peak measured with DSC in a heating-down period of the toner.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: June 12, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Aya Shirai, Kouji Sugama, Shiro Hirano, Noboru Ueda
  • Patent number: 9885966
    Abstract: An electrostatic charge image developing toner containing: toner particles; and silica particles having a compaction aggregation degree of from 60% to 95% and a particle compaction ratio of from 0.20 to 0.40, an electrostatic charge image developer containing the electrostatic charge image developing toner, and a toner cartridge that accommodates the electrostatic charge image developing toner and is detachable from an image forming apparatus.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: February 6, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tomohito Nakajima, Hiroyoshi Okuno, Satoshi Inoue, Yoshifumi Iida, Yuka Zenitani, Yoshifumi Eri, Takeshi Iwanaga, Sakae Takeuchi, Shunsuke Nozaki, Yasuo Kadokura, Yasuhisa Morooka
  • Patent number: 9864293
    Abstract: An electrostatic charge image developing carrier includes magnetic particles and a resin coating layer which covers the magnetic particles, wherein a sulfate ion concentration of the resin coating layer is 0.05% by weight or less with respect to a total weight of the resin coating layer, and when a total value of a molar amount of sulfate ions contained and a molar amount of sulfo groups contained per 1 g of the resin coating layer is A mol and a molar amount of sodium ions contained per 1 g of the resin coating layer is B mol, a relationship of 0.1<B/A<1.2 is satisfied.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: January 9, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Toshiaki Hasegawa, Takashi Tanabe, Masaaki Usami, Yasunobu Kashima, Takeshi Iwanaga
  • Patent number: 9796831
    Abstract: A process for producing particles, the process including pulverizing particles of a compound represented by formula (I) with a median diameter (50% D) of over 100 ?m by using a pulverizer in the presence of at least one member selected from the group consisting of silica, talc and clay, to obtain particles of the compound represented by formula (I) with a median diameter (50% D) of 100 ?m or less, in formula (I), R1 and R2 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, or alternatively, R1 and R2 are inked to each other to form a ring together with the nitrogen atom to which they are bound, m represents an integer of 2 to 9, Mn+ represents H+ or an n-valent metal ion, and n represents an integer of 1 or 2.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: October 24, 2017
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Hiroshi Shiratani, Masahito Sekiguchi, Yasuo Uekita
  • Patent number: 9696646
    Abstract: Suspension polymerization toner of a core-shell structure with dense charges comprises core-shell composite particles prepared by mixing suspension dispersion liquid of toner core particles with shell monomer emulsion and resin-type CCA dispersion liquid, and carrying out a polymerization reaction to form rigid shell layers with dense charges coated on the soft toner core particles.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: July 4, 2017
    Assignee: SHENZHEN LEPUTAI TECHNOLOGY CO., LTD
    Inventors: Zhijun Liu, Yuanyuan Zhang, Huan Zhang, Xiao Yuan, Hong Meng, Hui Yang
  • Patent number: 9618864
    Abstract: A toner comprised of mother toner particles each including a colorant, a resin A capable of forming a crystalline structure, and a resin B incapable of forming a crystalline structure is provided. The resin A is dispersed in the resin B in the state of phase separation. The long axis of each dispersed particle of the resin A has a length of from 30 to 200 nm and the length ratio of the long axis to the short axis is from 2 to 15. The DSC endothermic quantity attributable to the resin A is from 8 to 20 J/g.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: April 11, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideki Sugiura, Yuka Mizoguchi, Mio Kumai
  • Patent number: 9588450
    Abstract: Provided is a magnetic toner in which enhancement of initial transfer efficiency and transfer efficiency that is stable during a long-term use are achieved by simultaneously suppressing the friction force between the toner and a drum and the cohesion between toners, and further the degradation in chargeability and fluidity caused by the deterioration of the toner. The magnetic toner includes: a magnetic toner particle; a first external additive; and a second external additive. The first external additive includes an organic-inorganic composite fine particle, a plurality of convexes derived from an inorganic fine particle being present on a surface of the organic-inorganic composite fine particle, and has a number-average particle diameter of 50 nm or more and 500 nm or less. The second external additive includes a silica fine particle and has a number-average particle diameter of 5 nm or more and 30 nm or less. A shear load calculated from a rotation torque is 0.50 kPa or more and 2.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: March 7, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shohei Tsuda, Koji Nishikawa, Katsuhisa Yamazaki, Yojiro Hotta, Kazuo Terauchi, Motohide Shiozawa, Takeshi Naka, Takuya Mizuguchi, Takayuki Itakura
  • Patent number: 9470992
    Abstract: An image forming method includes: charging a surface of an electrostatic latent image holder with a charging roller; exposing the charged surface so as to form an electrostatic latent image; and developing the formed electrostatic latent image with toner. The toner contains at least a toner base particle and an external additive minute particle. The external additive minute particle contains a silica-polymer composite minute particle. A silicon atom abundance ratio obtained from abundances of a carbon atom, an oxygen atom and a silicon atom present on an outermost surface and within 3 nm from the outermost surface in a depth direction of the silica-polymer composite minute particle are measured with an x-ray photoelectron spectrometer satisfies at least the following condition A. 15.0 atm %?silicon atom abundance ratio ({Si/(C+O+Si)}×100)?30.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: October 18, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Satoshi Uchino, Shinya Obara, Yasuko Uchino, Ikuko Sakurada
  • Patent number: 9360824
    Abstract: An image forming apparatus is provided which includes an image bearer, a charger, an irradiator, a developing device to develop an electrostatic latent image on the image bearer with a toner to form a toner image, a transfer device to transfer the toner image onto a transfer medium, and a cleaner to remove toner particles remaining on the image bearer without being transferred. The toner includes a mother particle including a binder resin and a colorant and one or more external additives. At least one of the external additives includes primary particles having a number average particle diameter in the range of 0.05 to 0.30 ?m. The cleaner includes an elastic body blade having a contact part with the image bearer. The contact part has a surface elastic modulus in the range of 15 to 25 N/mm2 and a surface friction coefficient in the range of 0.5 to 0.7.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: June 7, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomohiro Fukao, Tsuyoshi Nozaki, Yoshihiro Mikuriya, Yoshimichi Ishikawa, Atsushi Yamamoto, Kazuoki Fuwa, Tomoharu Miki, Naoki Nakatake, Takeshi Yamashita, Tetsushi Sakuma
  • Patent number: 9316955
    Abstract: A cleaning device includes a pre-cleaning section and a first cleaning section. The pre-cleaning section includes a pre-cleaning roller and a pre-bias power source that applies a voltage having a polarity opposite to a regular charging polarity of toner to the pre-cleaning roller such that toner passing over the pre-cleaning roller is oppositely charged to the polarity opposite to the regular charging polarity. The first cleaning section includes a first cleaning roller and a first bias power source that applies a voltage having the polarity opposite to the regular charging polarity of toner to the first cleaning roller such that toner having the polarity identical to the regular charging polarity electrostatically attaches to the first cleaning roller from the transfer belt when a predetermined cleaning condition is satisfied.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: April 19, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventor: Taichi Meguro
  • Patent number: 9256147
    Abstract: A toner is provided including toner particles A having a circularity of greater than 0.93 and not greater than 1.00 and toner particles B having a circularity of from 0.85 to 0.93, wherein the following relationships are satisfied: 70?RA?95, 5?RB?30, 0.014?SD?0.025, and 0.940?ED?0.950, wherein RA (% by number) represents a ratio of a number of the toner particles A to a total number of toner particles included in the toner, RB (% by number) represents a ratio of a number of the toner particles B to the total number of toner particles included in the toner, SD represents a standard deviation of circularity of the toner particles A, and ED represents an average envelope degree of the toner particles B.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: February 9, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hideyuki Yamaguchi, Hachiroh Tosaka, Tomoyuki Satoh
  • Patent number: 9217939
    Abstract: A toner composition and a method of making a toner composition wherein toner particles having an average size in the range of 1-25 ?m may be mixed with large fumed silica particles sized 70 nm to 120 nm and medium fumed silica particles sized 30 nm to 60 nm and optionally alumina particles surface treated with an inorganic/organic compound. The large sized fumed silica particles are present in the range of 0.1% to 2% by weight of the toner composition. The medium sized fumed silica particles are present in the range of 0.1% to 2% by weight of the toner composition. The alumina particles surface treated with an inorganic/organic compound may be present in the range of 0.01% to 1.0% by weight of the toner composition.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: December 22, 2015
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventor: Kasturi Rangan Srinivasan
  • Patent number: 9170513
    Abstract: The present invention provides a yellow toner having high compatibility of a colorant with a binder resin, having good chroma, and being useful for broadening the green color gamut. The yellow toner contains the binder resin and the colorant, wherein the colorant contains a compound represented by the general formula (1).
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: October 27, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shosei Mori, Takeshi Sekiguchi, Yuko Katsumoto, Taichi Shintou, Takayuki Ujifusa, Takeshi Miyazaki
  • Patent number: 9158218
    Abstract: An electrostatic latent image developing toner includes toner base particles including a binder resin and an external additive attached to surfaces of the toner base particles. The external additive contains silica covered with a coating layer containing a nitrogen containing resin.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: October 13, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Masami Tsujihiro, Yoshio Ozawa
  • Patent number: 9141009
    Abstract: A coating composition, system, and method for printing documents that are difficult to chemically or physically forge and that are easy to visually verify are disclosed. The system includes a substrate, a toner, including a colorant and a dye, a primary migration-enhancing coating applied using an offset printing process and optionally a secondary migration-enhancing coating applied using an offset printing process. An image formed using the toner of the invention is readily verified by comparing a colorant-formed image and a dye-formed image. In addition, if a solvent is used in an attempt to alter the printed image on the substrate, the dye migrates or diffuses to indicate tampering with the document.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: September 22, 2015
    Assignee: TROY GROUP, INC.
    Inventors: Eugene Hoefs, Michael R. Riley, Kevin L. Heilman
  • Publication number: 20150140486
    Abstract: A toner includes a plurality of toner particles that each include a toner mother particle and an external additive adhering to a surface of the toner mother particle. The toner mother particle includes a core and a shell layer disposed over a surface of the core. The external additive contains silica particles. The toner mother particle has a hydrophobicity of at least 0% and less than 20%. The external additive has a hydrophobicity of at least 5% and no greater than 20%. The hydrophobicity of the toner mother particle is less than the hydrophobicity of the external additive.
    Type: Application
    Filed: November 12, 2014
    Publication date: May 21, 2015
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Masashi TAMAGAKI, Tomoyuki OGAWA
  • Patent number: 9034547
    Abstract: Main performances of a toner are significantly affected by a shape and surface characteristics of toner particles. Using an external additive may be a factor that complicates control of surface characteristics of the toner particles, and anti-offset properties of toner change according to a wax and a binder composition at a surface portion of the toner particles. Provided is a toner usable in electrophotography, wherein the toner has improved durability, fixability, charging stability, and cleaning properties through an appropriate distribution of a binder, a wax, and an external additive on a surface portion of toner particles.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: May 19, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hae-ree Joo, Tae-hoe Koo, Se-young Yoon, Seung-jun Lee
  • Publication number: 20150104739
    Abstract: A toner, containing: toner base particles; and an external additive, the toner base particles each including a binder resin and a releasing agent, wherein the external additive includes non-spherical coalesced particles in each of which primary particles are coalesced together, and wherein the coalesced particles satisfy the following formula (1): Nx/1,000×100?30% where Nx is a number of the primary particles present alone relative to 1,000 of the coalesced particles, as observed under a scanning electron microscope after stirring 0.5 g of the coalesced particles and 49.5 g of a carrier placed in a 50 mL bottle for 10 minutes by means of a mixing and stirring device at 67 Hz.
    Type: Application
    Filed: March 7, 2013
    Publication date: April 16, 2015
    Inventors: Tsuneyasu Nagatomo, Satoshi Kojima, Syouko Satoh, Kiwako Hirohara, Osamu Uchinokura, Junichi Awamura, Satoshi Ogawa, Takahiro Honda
  • Patent number: 9005858
    Abstract: A toner to develop electrostatic latent images, which has surface characteristics that may simultaneously improve charge uniformity, charge stability, transferability, and cleaning ability. The toner to develop electrostatic latent images may include core particles comprising a binder resin, a colorant, and a releasing agent; and an external additive including silica particles and titanium dioxide particles, wherein the external additive is attached to external surfaces of the core particles, wherein an iron intensity [Fe], a silicon intensity [Si], and a titanium intensity [Ti] that are measured by X-ray fluorescence (XRF) satisfy both conditions, 0.004?[Si]/[Fe]?0.009 and 0.8?[Ti]/[Fe]?2.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: April 14, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Se-young Yoon, Sung-jin Park, Hong-chul Shin, Seung-sik Woo, Hae-ree Joo
  • Patent number: 9005864
    Abstract: A toner including: toner base particles; and an external additive, the toner base particles each comprising a binder resin and a colorant, wherein the external additive comprises non-spherical particles and spherical particles, wherein the non-spherical particles are each a secondary particle in which spherical primary particles are coalesced together, and wherein the non-spherical particles and the spherical particles in the external additive satisfy a relationship expressed by the following formula (1): 3Ca(%)<Cb(%)??Formula (1) where Ca is greater than 10% but smaller than 20% and Cb is greater than 40% but smaller than 70%, and Ca and Cb are values given by: Ca = ( an ? ? amount ? ? of ? ? the ? ? non ? - ? spherical ? ? particles ? ? ( % ? ? by ? ? mass ) / 100 ) × ( a ? ? projected ? ? area ? ? of ? ? the ? ? non ? - ? spherical ? ? particles ? ? ( cm 2 ? / ? g ) ) ( an ? ? amount ? ? of ? ? the
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: April 14, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Syouko Satoh, Tsuneyasu Nagatomo, Satoshi Kojima, Osamu Uchinokura, Junichi Awamura, Daisuke Ito, Satoshi Ogawa, Kiwako Hirohara, Takahiro Honda, Daisuke Inoue
  • Patent number: 8999617
    Abstract: An electrostatic charge image developing toner includes toner particles and silica particles that have a titanium content of from 0.001% by weight to 10% by weight in a surface layer, an average particle diameter of from 30 nm to 500 nm, and a particle size distribution index of from 1.1 to 1.5, and are surface-treated with a titanium compound in which an organic group is bonded to a titanium atom via an oxygen atom, and a hydrophobizing agent in sequence.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: April 7, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshifumi Iida, Takeshi Iwanaga, Yuka Zenitani, Yasunobu Kashima, Chika Hama
  • Publication number: 20150086917
    Abstract: Provided are a toner and a two-component developer each of which: shows a small fluctuation in charge quantity and a small fluctuation in image density even under a high-temperature and high-humidity environment; and does not cause any member contamination even after endurance and hence can stably output an image. The toner and the two-component developer each have a feature in that positively chargeable strontium titanate fine particles are added to toner particles having fixed thereto negatively chargeable silica fine particles.
    Type: Application
    Filed: September 11, 2014
    Publication date: March 26, 2015
    Inventors: Yosuke Iwasaki, Nozomu Komatsu, Takakuni Kobori, Kohji Takenaka, Hideki Kaneko, Takeshi Hashimoto, Ichiro Kanno, Hiroyuki Fujikawa
  • Patent number: 8986917
    Abstract: A method of making a toner composition includes preparing raw toner particles, increasing a surface area of the raw toner particles by contacting the raw toner particles with a base to produce base-treated raw toner particles, and mixing the base-treated raw toner particles with at least one surface additive such that the at least one surface additive attaches to a surface of the base-treated raw toner particles to obtain blended toner particles. A toner composition includes blended toner particles containing base-treated raw toner particles, and at least one surface additive attached to a surface of the base-treated raw toner particles, wherein a ratio of a triboelectric charge of the blended toner composition to a triboelectric charge of the base-treated raw toner particles is from about 0.8 to about 1.2.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 24, 2015
    Assignee: Xerox Corporation
    Inventors: Juan A. Morales-Tirado, Blaise Luzolo
  • 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: 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
  • Patent number: 8956796
    Abstract: Provided is an electrostatic charge image developing toner including toner base particles which contain a polyester resin and a vinyl resin and does not have a coating layer and wherein the concentration of the polyester resin on the particle surface is higher than the concentration of the polyester resin in the inside of the particles, and a sol-gel silica which has an average circularity of from 0.75 to 0.9, on the surface of the toner base particles.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: February 17, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuo Kadokura, Kazufumi Tomita, Hideaki Yoshikawa
  • Patent number: 8956795
    Abstract: A toner for developing an electrostatic image, including: toner base particles each including a binder resin and a releasing agent; and inorganic fine particles, wherein the toner includes the inorganic fine particles as an external additive on a surface of the toner base particle, wherein the toner base particles have a BET specific surface area of 2.5 m2/g to 5.0 m2/g, and wherein the inorganic fine particles comprise inorganic fine particles (A) which are each a secondary particle where a plurality of primary particles are coalesced together.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: February 17, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Kojima, Tsuneyasu Nagatomo, Syouko Satoh, Osamu Uchinokura, Junichi Awamura, Satoshi Ogawa, Takahiro Honda, Daisuke Ito, Teruki Kusahara, Masaki Watanabe, Daisuke Inoue, Kiwako Hirohara
  • Patent number: 8945804
    Abstract: Treated metal oxide particles include metal oxide particles treated with at least a charge modifying agent. The charge modifying agent is represented by the following formula: An-Zc—Yb—Ar(EW)a wherein Ar represents an aromatic group, EW represents an electron withdrawing group, Y represents a spacer group, Z represents an alkylene group, An represents an anchor group, a is an integer from 1 to 5, b is 0 or 1, and c is 0 or 1. The treated metal oxide particles may also be treated with a second charge modifying agent or with a hydrophobicity-imparting agent. A toner composition including toner particles and treated metal oxide particles is also disclosed.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: February 3, 2015
    Assignee: Cabot Corporation
    Inventors: Jinsong Liu, Hairuo Tu, Dmitry Fomitchev
  • Patent number: 8936897
    Abstract: A composite color toner image can be enhanced by applying a separate fluorescing toner image over it to provide an enhanced color toner image having a “pinkish” fluorescing effect. This separate fluorescing toner image is obtained using visible fluorescing dry magenta toner particles. Each of these toner particles consists essentially of a polymeric binder phase and a visible fluorescing colorant that emits at one or more peak wavelengths of at least 510 nm and up to and including 590 nm and that is dispersed within the polymeric binder phase.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: January 20, 2015
    Assignee: Eastman Kodak Company
    Inventors: Dinesh Tyagi, Louise Granica, Chung-Hui Kuo
  • Publication number: 20140370427
    Abstract: An electrostatic charge image developing toner includes toner particles and silica particles, wherein the silica particles have an average equivalent circle diameter of from 70 nm to 400 nm, an average circularity of from 0.5 to 0.9, and a pore volume of from 0.05 cm3/g to 2.5 cm3/g.
    Type: Application
    Filed: October 28, 2013
    Publication date: December 18, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Koji SASAKI, Satoshi INOUE, Yutaka SAITO, Yasuaki HASHIMOTO, Emi TAKAHASHI
  • Publication number: 20140370432
    Abstract: The instant disclosure describes acrylate-coated carrier resins exhibiting both high charge and improved RH sensitivity, carrier compositions comprising the acrylate coated carriers and developers comprising the carrier resins.
    Type: Application
    Filed: June 14, 2013
    Publication date: December 18, 2014
    Inventors: Richard PN Veregin, Qingbin Li, Andriy Kovalenko, Sergey Gusarov, Daryl W. Vanbesien, Michael S. Hawkins
  • Publication number: 20140370430
    Abstract: A toner particle includes a core containing a styrene-based resin; a low melting point wax; optionally an additive package; and optionally a colorant, wherein the low melting point wax has a melting point of less than about 80° C. A method of making a toner particle includes forming a slimy by mixing together an emulsion containing a resin, a low melting point wax, optionally a colorant, optionally a surfactant, optionally a coagulant, and one or more additional optional additives; and heating the slurry to form aggregated particles in the slurry, wherein the aggregated particles form a core of the toner particles; and the low melting point wax has a melting point of less than about 80° C.
    Type: Application
    Filed: June 13, 2013
    Publication date: December 18, 2014
    Inventors: Grazyna E. KMIECIK-LAWRYNOWICZ, Samir KUMAR, Robert D. BAYLEY, Maura A. SWEENEY
  • Patent number: 8911923
    Abstract: The toner for developing an electrostatic charge image includes toner particles containing a colorant, a binder resin, and a release agent, and an external additive, wherein the external additive contains inorganic particles having fluorine atom-containing oil on the hydrophobization-treated surfaces.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: December 16, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshifumi Iida, Eiji Kawakami, Shintaro Anno, Masahiro Takagi
  • Publication number: 20140356776
    Abstract: A toner particle includes a core including at least one resin, optionally a wax, and a colorant, and a shell comprising at least one charge control agent. The core is substantially free of the charge control agent. The toner particle has improved charging performance compared with core-shell toner particles having the charge control agent in the core of the toner particle.
    Type: Application
    Filed: May 31, 2013
    Publication date: December 4, 2014
    Inventors: ROBERT D. BAYLEY, MAURA A. SWEENEY, GRAZYNA E. KMIECIK-LAWRYNOWICZ, SHIGANG STEVEN QIU, TIE HWEE NG
  • Publication number: 20140329176
    Abstract: Provided is a toner that allows a transferred image to be stably output regardless of smoothness of a transfer material even under high-temperature and high-humidity environment or under low-temperature and low-humidity environment, that is excellent in cleanability for a transfer member even at the time of high-speed printing, and that causes less member contamination. The toner is a toner including toner particles each containing a binder resin and a wax, and silica fine particles on surfaces of the toner particles, wherein the silica fine particles have a number-average particle diameter of primary particles of 60 nm or more and 300 nm or less, a coverage rate of the surfaces of the toner particles with the silica fine particles is 15% or more and 95% or less, and the toner has a uniaxial collapse stress at a maximum consolidation stress of 10.0 kPa, of 2.5 kPa or more and 3.5 kPa or less.
    Type: Application
    Filed: April 24, 2014
    Publication date: November 6, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Ichiro Kanno, Nozomu Komatsu, Takakuni Kobori, Takeshi Hashimoto, Yosuke Iwasaki, Hiroyuki Fujikawa, Hideki Kaneko
  • Patent number: 8871416
    Abstract: An electrostatic charge image developing toner includes toner particles containing a colorant, a binder resin, and a release agent, and an external additive, wherein the external additive includes particles having oil-treated surfaces and composite particles containing silica and titania, and the toner has a content ratio of titania with respect to silica on the surface of the toner, as measured by X-ray photoelectron spectroscopy, of equal to or less than 5 atomic %.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: October 28, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yutaka Saito, Hiroki Ohmori, Hirokazu Hamano
  • Patent number: 8865384
    Abstract: An electrophotographic toner, including: a binder resin; a colorant; and an organically-modified layered inorganic mineral, wherein the binder resin contains 50% by mass or more of a crystalline resin relative to the binder resin, and the crystalline resin contains a resin having a sulfonic acid group, and wherein an amount of the sulfonic acid group is 0.1% by mass to 2.0% by mass relative to the resin having the sulfonic acid group.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: October 21, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahide Yamada, Shinya Nakayama, Atsushi Yamamoto, Hideyuki Santo, Shingo Sakashita, Yukiko Nakajima, Suzuka Amemori, Akiyoshi Sabu
  • Publication number: 20140302434
    Abstract: The disclosure describes acrylate carrier resins, optionally, with a C/O of at least about 4, comprising a heterocycle comprising sulfur, exhibiting high charge and improved RH sensitivity, carrier compositions comprising the acrylate-coated carriers and developers comprising a toner and the acrylate-coated carrier.
    Type: Application
    Filed: April 3, 2013
    Publication date: October 9, 2014
    Applicants: National Research Council of Canada, Xerox Corporation
    Inventors: Richard PN Veregin, Qingbin Li, Andriy Kovalenko, Sergey Gusarov
  • Patent number: 8852838
    Abstract: An electrostatic charge image developing toner includes toner particles that contain a binder resin having a carboxyl group, in which the carboxyl group in the binder resin present on the surfaces of the toner particles forms an alkaline earth metal salt, and an amount of the alkaline earth metal which is detected through ion chromatography of the toner particles is in a range of from 1.00×10?10 mol/g to 0.90×10?6 mol/g.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: October 7, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Kamiwaki, Akira Matsumoto, Yukiaki Nakamura, Masanobu Ninomiya, Yusuke Ikeda