Patents Examined by Peter Vajda
  • Patent number: 9910372
    Abstract: An electrostatic charge image developing toner includes: toner particles; first silica particles having an average circularity of 0.9 to 1.0, a particle size distribution index of 1.05 to 1.25, and a compression aggregation degree of 60% to 95%; and second silica particles having an average circularity of 0.9 to 1.0, a particle size distribution index of 1.05 to 1.25, and a compression aggregation degree of 60% to 95%, wherein, when an average primary particle diameter of the first silica particles is set as Da (nm) and an average primary particle diameter of the second silica particles is set as Db (nm), relationships of the following Expressions (A1) to (A3) are satisfied: Expression (A1): 80?Da?120, Expression (A2): 120?Db?200, and Expression (A3): 10?Db?Da?120.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: March 6, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Moegi Iguchi, Sakon Takahashi, Takeshi Tanabe, Hiroshi Kamada, Yasuaki Hashimoto, Masaaki Usami, Yuka Zenitani, Yuta Saeki, Hiroaki Saijo
  • Patent number: 9904197
    Abstract: An electrostatic charge image developing toner includes toner particles containing a binder resin, and an external additive including silica particles having a compression aggregation degree is from 60% to 95% and a particle compression ratio is from 0.20 to 0.40, and resin particles containing a polymer obtained by polymerizing a (meth)acrylic acid ester monomer.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: February 27, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yoshifumi Eri, Hiroyoshi Okuno, Satoshi Inoue, Yoshifumi Iida, Tomohito Nakajima, Yuka Zenitani, Takeshi Iwanaga, Sakae Takeuchi, Shunsuke Nozaki, Yasuo Kadokura, Yasuhisa Morooka
  • Patent number: 9891555
    Abstract: An electrostatic charge image developing toner set includes a brilliant toner including toner particles that include a brilliant pigment and a first binder resin, a black toner including toner particles that include a second binder resin, and a color toner except a black toner, including toner particles that include a third binder resin, wherein the brilliant toner, the black toner and the color toner satisfy Expression (1): Dielectric loss factor of the brilliant Toner>Dielectric loss factor of the black toner>Dielectric loss factor of the color toner and Expression (2): 25×10?3?(Dielectric loss factor of the brilliant toner)?(Dielectric loss factor of the color toner)?95×10?3.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: February 13, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Satomi Hara, Masaru Takahashi, Atsushi Sugawara, Sakiko Hirai
  • Patent number: 9885967
    Abstract: Provided is a resin for a toner, which is a copolymer including a crystalline segment, and having a maximum elastic stress value at 100° C. (ES100) of 1,000 Pa or less, and a maximum elastic stress value at 70° C. (ES70) of 1,000 Pa or greater when the temperature is lowered from 100° C. to 70° C., where the maximum elastic stress values are measured according to a large amplitude oscillatory shear procedure.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: February 6, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Azumi Miyaake, Daisuke Asahina, Toyoshi Sawada, Hiroshi Yamashita, Tsuyoshi Sugimoto, Shinya Nakayama, Susumu Chiba, Satoyuki Sekiguchi
  • Patent number: 9864291
    Abstract: A hybrid toner includes a core having at least one amorphous polyester resin and at least one crystalline polyester resin, and at least one styrene/acrylate resin, a shell comprising at least one styrene/acrylate resin, at least one wax, and optionally a pigment dispersion, the first modulated differential calorimetry scan of the hybrid toner shows at least two melting point peaks below about 80° C., and the difference between the two melting point peaks is less than or equal to about 15° C.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: January 9, 2018
    Assignee: XEROX CORPORATION
    Inventors: Richard P. N. Veregin, Valerie M. Farrugia, Frank Ping-Hay Lee, Michael J. D'Amato, Michael S. Hawkins, Edward G. Zwartz, Yulin Wang, Abdisamed Sheik-Qasim, Sandra J. Gardner
  • Patent number: 9864290
    Abstract: Disclosed is a toner including toner particles each including a core portion that contains a binder resin, and a surface layer containing an organosilicon polymer, in which each of the toner particles contains a polyvalent metal element having a resistivity of 2.5×10?8 ?·m or more and 10.0×10?8 ?·m or less at 20° C., and when the toner particles are subjected to X-ray fluorescence analysis, a net intensity originating from the polyvalent metal element is 0.10 kcps or more and 30.00 kcps or less.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: January 9, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kentaro Yamawaki, Shiro Kuroki, Toshihiko Katakura, Akane Masumoto, Tsuneyoshi Tominaga
  • Patent number: 9857711
    Abstract: Provided is a toner including toner particles each containing: a binder resin, a crystalline polyester, and a colorant, in which: the colorant includes a compound represented by the following formula (1); and the binder resin and the crystalline polyester satisfy the following formula (2): in the formula (1), R1, R2, and R3 each independently represent a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and Ar represents an aryl group. ?SP=|SP1?SP2|?0.43??Formula (2).
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: January 2, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yu Yoshida, Masashi Kawamura, Yuhei Terui, Takayuki Toyoda, Takeshi Sekiguchi
  • Patent number: 9857715
    Abstract: Liquid electrophotographic compositions, methods of manufacturing liquid electrophotographic compositions, methods of printing using liquid electrophotographic compositions and printed articles are disclosed.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: January 2, 2018
    Assignee: Hewlett-Packard Indigo B.V.
    Inventors: Hannoch Ron, Inna Tzomik
  • Patent number: 9857712
    Abstract: An electrostatic latent image developing toner includes a plurality of toner particles each including a core and a shell layer. The shell layer is disposed over a surface of the core. The shell layer is substantially formed by a resin. The shell layer has a surface including a plurality of spot regions and a sheet region that is more hydrophobic than the spot regions. The spot regions each are more chargeable than the sheet region.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: January 2, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Masami Tsujihiro, Jun Hioki, Ryotaro Komada, Yusuke Washino, Haruhiro Nishitera
  • Patent number: 9851650
    Abstract: A toner contains a styrene acrylic resin, a block polymer, and an organosilicon polymer, in which the organosilicon polymer has a specific partial structure, the block polymer has a polyester segment and a vinyl polymer segment, the melting point is 55° C. or more and 90° C. or less, the mass ratio of the polyester segment to the vinyl polymer segment is 40/60 to 80/20, and the polyester segment has a specific unit.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: December 26, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoya Isono, Yoshihiro Nakagawa, Harumi Takada, Reo Tagawa, Shiro Kuroki, Sara Yoshida
  • Patent number: 9851648
    Abstract: The present invention provides an electrophotographic photosensitive member that allows positive ghost to be reduced even in repeated use. The electrophotographic photosensitive member of the present invention is an electrophotographic photosensitive member wherein an undercoat layer contains a polymerization product of a composition including a compound represented by the following formula (1).
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: December 26, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masashi Nishi, Kunihiko Sekido, Michiyo Sekiya, Kei Tagami, Isao Kawata, Yuto Ito, Akihito Saitoh
  • Patent number: 9835963
    Abstract: A magnetic one-component developer includes magnetic toner particles containing a binder resin and a magnetic powder, and silica particles having a compression and aggregation degree of 60% or more and 95% or less and a particle compression ratio of 0.20 or more and 0.40 or less.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: December 5, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Satoshi Inoue, Hiroyoshi Okuno, Yoshifumi Iida, Tomohito Nakajima, Yuka Zenitani, Yoshifumi Eri, Takeshi Iwanaga, Sakae Takeuchi, Yasuhisa Morooka, Yasuo Kadokura, Shunsuke Nozaki
  • Patent number: 9835961
    Abstract: Provided is an excellent phthalocyanine crystal having high sensitivity and little fluctuation in sensitivity for a humidity change in a use environment and applicable to the martial for solar battery, electronic paper, electrophotographic photoreceptor, etc. Namely, phthalocyanine crystal obtained by bringing a phthalocyanine crystal precursor into contact with an aromatic aldehyde compound to convert the crystal form. Also, provided is an electrophotographic photoreceptor that not only exhibits high sensitivity but also has little fluctuation in sensitivity for a humidity change in a use environment. Further, provided is an electrophotographic photoreceptor cartridge and an image-forming device, both of which can produce a stable quality images for a humidity change in a use environment by using the electrophotographic photoreceptor.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: December 5, 2017
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Mitsuo Wada, Kazutaka Ida, Teruyuki Mitsumori, Hiroaki Takamura, Tadashi Mizushima
  • Patent number: 9829810
    Abstract: In an electrophotographic photosensitive member including a support and a photosensitive layer formed on the support, a surface layer of the electrophotographic photosensitive member contains a cured product obtained by copolymerizing at least one compound (i) selected from the group consisting of a triphenylamine compound having a hydroxymethyl group and a benzidine compound having a hydroxymethyl group, and at least one compound (ii) selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), a compound represented by the following formula (3), and a compound represented by the following formula (4):
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: November 28, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Nonaka, Ryoichi Tokimitsu, Shinji Takagi, Koichi Nakata, Haruki Mori
  • Patent number: 9829820
    Abstract: The present invention is directed to providing a toner having no environmental difference in charging performance, and having high stability of images after output of a large number of copies under environments at high temperature and high humidity in a higher-speed one-component developing system, and a method for producing the toner, and the toner comprises a toner particle including a toner base particle containing a binder resin, a colorant and a releasing agent; and a resin particle adhering to the surface of the toner base particle, wherein the resin particle contains a resin A, and the resin A has an ionic functional group and an acid dissociation constant pKa of 7.0 or more and 9.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: November 28, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Akane Masumoto, Kunihiko Nakamura, Tsuneyoshi Tominaga
  • Patent number: 9823594
    Abstract: A method of producing an emissive toner composition including selecting a photoluminescent agent, a charge control agent, and one or more additives and combining the photoluminescent agent, charge control agent, and one or more additives to form an emissive toner composition that when printed to produce an image component on a substrate, the emission spectra of the image component for irradiation with a first excitation energy includes only dominant emission peaks corresponding to one or more dominant emission peaks of the photoluminescent agent. The photoluminescent agent is selected such that it emits light having one or more dominant emission peaks in a first emission spectral region when irradiated with the first excitation energy. The charge control agent and one or more additives are selected such that they do not emit light in the visible spectrum when irradiated with visible light and does not emit light in the first emission spectral region when irradiated with the first excitation energy.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: November 21, 2017
    Assignee: Angstrom Technologies, Inc.
    Inventors: William J. Coyle, Anthony Stramondo
  • Patent number: 9823592
    Abstract: The present disclosure is drawn to apparatuses and methods that include a coated photoconductive substrate. The coated photoconductive substrate can include a photoconductive substrate with a charge generation layer and a charge transport layer, and can also have a coating adhered to the photoconductive substrate. The coating can have a thickness ranging from 1 nm to 200 nm.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: November 21, 2017
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Michael H. Lee, Krzysztof Nauka, Sivapackia Ganapathiappan, Omer Gila
  • Patent number: 9804514
    Abstract: Provided is a method for producing a toner, the method including a treatment process of treating a coloring particle including a binder resin, a colorant, a crystalline polyester, and a wax in an aqueous medium, wherein, the peak temperature of a crystallization peak (Pp) in the crystalline polyester is denoted by Tp (° C.) and the peak temperature of a crystallization peak (Pw) in the wax is denoted by Tw (° C.), the Tp and Tw satisfy a specific relationship, and the treatment process has a specific cooling step.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: October 31, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoshitaka Suzumura, Yusuke Hasegawa, Tomohisa Sano, Yuujirou Nagashima, Kozue Uratani
  • Patent number: 9804517
    Abstract: An electrostatic latent image developing toner contains a plurality of toner particles each including a toner core and a shell layer disposed over a surface of the toner core. The shell layer has at least one first domain having a film shape and a plurality of second domains each having a particle shape. The first domain is formed substantially from a non-crosslinked resin. The second domains are formed substantially from a crosslinked resin. The crosslinked resin has a glass transition point 45° C. or more greater than the non-crosslinked resin. The first domain has an average height from the surface of the toner core of at least 10 nm and less than 50 nm. The second domains have an average height from the surface of the toner core of at least 50 nm and no greater than 100 nm.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: October 31, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Kazuki Tsuchihashi
  • Patent number: 9804519
    Abstract: A method for producing a toner containing a toner particle containing a binder resin, a colorant and a crystalline substance, wherein the method includes the steps of: (I) setting a temperature of a dispersion, in which a coloring particle is dispersed with an aqueous medium, to TA(° C.), which is higher than the higher of a crystallization temperature Tc(° C.) of the crystalline substance and a glass transition temperature Tg(° C.) of the coloring particle, the coloring particle containing the binder resin, the colorant and the crystalline substance; (II) cooling the dispersion from the TA to a temperature equal to or lower than the Tg at a cooling rate of at least 5.0° C./min after the step (I); and (III) holding the dispersion in a temperature from Tg?10 to Tg+10 for at least 30 min after the step (II).
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: October 31, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshitaka Suzumura, Yusuke Hasegawa, Tomohisa Sano, Satoshi Arimura, Takuma Ikejiri