Patents Examined by Janis L. Dote
  • Patent number: 10642176
    Abstract: A photosensitive body is provided. The photosensitive body includes a photosensitive layer, and a protective layer formed on the photosensitive layer, and the protective layer includes a urethane oligomer acrylate and a modified perfluoropolyether acrylate.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: May 5, 2020
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Young-soo Ha, Sung-hoon Kang, Yong-jun Kwon, Seung-ju Kim, So-hyeon An, Hun Jung, Il-sun Hwang
  • Patent number: 10635009
    Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer having a single-layer structure. The photosensitive layer contains a charge generating material, an electron transport material, a polycarbonate resin, and a hole transport material. The electron transport material includes a compound having a halogen atom and represented by general formula (1), (2), (3), (4), or (5). The polycarbonate resin has a terminal group having a fluoro group and represented by general formula (10). The hole transport material includes a compound represented by general formula (20), (21), (22), (23), (24), (25), (26), or (27). A charge of calcium carbonate as measured by charging the calcium carbonate through friction with the photosensitive layer is at least +6.5 ?C/g. The photosensitive layer has a Vickers hardness of at least 17.0 HV at 45° C.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: April 28, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Tomofumi Shimizu
  • Patent number: 10635010
    Abstract: A toner having a toner particle having a plurality of fine particles on the surface of a toner base particle, the toner base particle contains a binder resin, wherein a fine particle layer A constituted of a plurality of the fine particles is observed in an EDX mapping image of the constituent elements in a cross section of the toner particle as provided by EDX of the toner particle cross section observed using TEM; a fine particle B, containing a metal compound containing at least one metal element M selected from all the metal elements belonging to Groups 3 to 13, is observed in the fine particle layer A; and the number-average particle diameter D of the fine particle B, the average value H of the thickness of the fine particle layer A, and the standard deviation S on the thickness of the fine particle layer A satisfy prescribed relationships.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: April 28, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kenta Kamikura, Kunihiko Nakamura, Maho Tanaka, Yusuke Kosaki
  • Patent number: 10620558
    Abstract: Described herein is a LEP ink composition comprising a luminescent component, a resin; and a carrier liquid security liquid electrostatic ink composition for printing a security image.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: April 14, 2020
    Assignee: HP Indigo B.V.
    Inventors: Haim Cohen, Yaron Grinwald, Julia Kornilov, Reut Avigdor, Gideon Amir
  • Patent number: 10613449
    Abstract: A method for treating a substrate is provided herein. The method includes providing a substrate and applying a composition to the substrate to form the treated substrate. The composition includes a binder, a binder additive, and an aluminum salt. A method for improving adhesion of an image to the treated substrate is also provided herein. The method includes providing the substrate, applying the composition to the substrate to form the treated substrate, and applying a liquid toner to the treated substrate to form the image on the treated substrate. A printed material exhibiting improved adhesion of the image to the treated substrate is also provided herein. The printed material includes a treated substrate. The treated substrate includes the substrate and a coating disposed on the substrate and formed from the composition. The printed material further includes the image disposed on the treated substrate and formed from the liquid toner.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: April 7, 2020
    Assignee: SOLENIS TECHNOLOGIES, L.P.
    Inventor: Daniel F. Varnell
  • Patent number: 10591839
    Abstract: Herein is described a liquid electrostatic ink composition comprising a carrier liquid, a resin, a colorant selected from a magenta colorant, a cyan colorant and a black colorant, an amine-containing basic dispersant having a total base number (TBN) in the range of about 10 to about 65 mgKOH/g material, the amine-containing basic dispersant present in an amount from about 5 wt. % to about 40 wt. % by total weight of colorant.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: March 17, 2020
    Assignee: HP Indigo B.V.
    Inventors: Gil Bar-Haim, Shiran Zabar, Danny Feldman, Alina Grishman, Albert Teishev
  • Patent number: 10591829
    Abstract: A toner according to an embodiment includes a colorant, a binder resin, and an ester wax. The colorant, the binder resin and the ester wax form a toner particle. The ester wax contains two or more ester compounds represented by the general formula R1COOR2, where R1 and R2 each independently is an alkyl group. The total number of carbon atoms of R1 and R2 is in a range from 31 to 53. The two or more ester compounds have different number of carbon atoms from each other.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: March 17, 2020
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Tsutomu Katsumata
  • Patent number: 10585365
    Abstract: An object of the present invention is to provide an image bearing member for electrophotography. The image bearing member has high mechanical properties which include abrasion resistance and scratch resistance, is excellent in toner releasability, and is capable of retaining these features. The present invention provides an image bearing member for electrophotography, which includes a surface layer, the surface layer being composed of a polymerization-cured product of a composition containing a polymerizable monomer and surface-treated metal oxide particles, and the surface-treated metal oxide particles are metal oxide particles surface-treated with a surface treating agent having a silicone side chain.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: March 10, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Tomoko Sakimura, Hiroki Takao, Mayuko Matsusaki, Kengo Ikeda
  • Patent number: 10564563
    Abstract: Described herein is a liquid electrostatic ink composition. The composition may comprise: a. a carrier liquid; and b. chargeable particles suspended in the carrier liquid, wherein the chargeable particles comprise a thermoplastic resin formed from the reaction of a first resin and a second resin, wherein i. the first resin comprises a polymer having acidic side groups; and ii. the second resin comprises an epoxy resin component and an elastomeric component, wherein the epoxy resin component has one or more epoxide groups per molecule.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: February 18, 2020
    Assignee: HP Indigo B.V.
    Inventors: Albert Teishev, Hanit Marom Tchaicheeyan, Igor Shutyi
  • Patent number: 10558133
    Abstract: An electrophotographic photosensitive member suppressing potential variation due to repeated use is provided. The electrophotographic photosensitive member is an electrophotographic photosensitive member including a support, a photosensitive layer and a protective layer in this order, wherein the protective layer contains: a resin including a structure represented by a general formula (1) and a structure represented by a general formula (2); and a compound represented by a general formula (3), the molar ratio of the proportion of the structure represented by the general formula (2) to the proportion of the structure represented by the general formula (1) in the resin is 0.0002 to 0.1000 in a molar ratio, and the molar ratio of the content of the compound represented by the general formula (3) to the content of the structure represented by the general formula (1) in the resin in the protective layer is 0.0002 to 0.1000 in a molar ratio.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: February 11, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Nobuhiro Nakamura, Tsutomu Nishida, Atsushi Okuda, Yuka Ishiduka, Hiroyuki Watanabe, Hideharu Shimozawa, Kenichi Kaku, Koichi Nakata, Haruki Mori
  • Patent number: 10551758
    Abstract: Provided is a toner, including a toner particle having: a toner base particle containing a binder resin and a colorant; and protrusion derived from a resin fine particle in a surface of the toner base particle, wherein the protrusion is covered with a condensation product of an organosilicon compound represented by the formula (1), and wherein the resin fine particle is in direct contact with the toner base particle.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: February 4, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Maho Tanaka, Kunihiko Nakamura, Kenta Kamikura, Fumiya Hatakeyama, Akane Masumoto
  • Patent number: 10551755
    Abstract: The present invention relates to an electrostatic charge image developing toner having a ratio of TP2/TP1 of 1.47 to 2.35, wherein a first measurement value of a tan ? maximal value measured in 40° C. to 80° C. by a rheometer is set as the TP1, and a second measurement value of a tan ? maximal value measured in 40° C. to 80° C. by the rheometer is set as the TP2.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: February 4, 2020
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Masaya Ota, Tomoko Nakagawa, Yuki Narukawa, Masaaki Okamoto
  • Patent number: 10545420
    Abstract: A magnetic toner is provided, which has a magnetic toner particle containing a binder resin, a wax, and a magnetic body, wherein, when Dn is a number-average particle diameter of the toner, CV1 is coefficient of variation of a brightness variance value of the toner in a particle diameter range of Dn ?0.500 to +0.500, and CV2 is coefficient of variation of a brightness variance value of the toner in a particle diameter range of Dn ?1.500 to ?0.500, a relationship CV2/CV1?1.00 is satisfied; an average brightness of the toner in the range of Dn ?0.500 to +0.500 is 30.0 to 60.0; and when, in a cross section of the toner observed using a transmission electron microscope, which is divided with a square grid having a side of 0.8 ?m, coefficient of variation CV3 of an occupied area percentage for the magnetic body is 40.0 to 80.0%.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: January 28, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tetsuya Kinumatsu, Yusuke Hasegawa, Kosuke Fukudome, Tomohisa Sano, Kenji Ookubo, Yoshitaka Suzumura, Takuma Ikejiri
  • Patent number: 10545419
    Abstract: Herein is disclosed magenta liquid electrostatic ink compositions. In some examples, the electrostatic ink compositions comprise a magenta pigment, a basic dispersant, a resin comprising a polymer having acidic side groups, a carrier liquid and a charge director, wherein the dispersant comprises a compound comprising a succinimide group linked to a primary, secondary or tertiary amine.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: January 28, 2020
    Assignee: HP Indigo B.V.
    Inventors: Gil Bar-Haim, Tal Rosenthal, Albert Teishev, Marc Klein
  • Patent number: 10527962
    Abstract: An electrostatic charge image developing toner includes: a toner particle having average circularity of 0.91 or more and 0.98 or less, a silica particle externally added to the toner particle, and a strontium titanate particle that is externally added to the toner particle, that has an average primary particle diameter of 10 nm or more and 100 nm or less, that has average primary particle circularity of 0.82 or more and 0.94 or less, and circularity that becomes 84% of accumulation of the primary particle of more than 0.92.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: January 7, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yuka Yamagishi, Moegi Iguchi, Yutaka Saito, Mona Tasaki, Soutaro Kakehi, Sakon Takahashi
  • Patent number: 10520841
    Abstract: An electrostatic image developing toner includes a toner particle and an external additive. The toner particle contains a binder resin and a release agent that includes a hydrocarbon wax. The binder resin includes a vinyl resin and a hybrid resin in which an amorphous resin unit other than polyester resins and a crystalline polyester resin unit are chemically bound together. The toner particle has hybrid resin domains and release agent domains. An average distance Lhyb from the surface of the toner particle to the centers of the hybrid resin domains and an average distance Lwax from the surface of the toner particle to the centers of the release agent domains satisfy Lwax<Lhyb.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: December 31, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Narumasa Sato, Erina Saito, Yuka Kawamoto, Noriyuki Mizutani, Kotaro Yoshihara, Daisuke Ishizuka
  • Patent number: 10514623
    Abstract: An electrostatic charge image developing toner includes: a toner particle that contains a releasing agent, that has an exposed portion in which the releasing agent is exposed on a surface, and in which a proportion of the exposed portion occupying a surface, which is obtained by X-ray photoelectron spectroscopic analysis is 1 atom % or more and 20 atom % or less; and a strontium titanate particle that is externally added to the toner particle, that is doped with a metal element other than titanium and strontium, and in which an average primary particle diameter is 10 nm or more and 100 nm or less.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: December 24, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Soutaro Kakehi, Sakon Takahashi, Moegi Iguchi, Yutaka Saito, Mona Tasaki, Yuka Yamagishi
  • Patent number: 10514622
    Abstract: A toner includes toner particles. Each of the toner particles includes a composite core and a shell layer covering a surface of the composite core. Each of the composite cores is a composite of a toner core and foamable particles provided on a surface of the toner core. An amount of the foamable particles is at least 0.3% by mass relative to mass of the toner cores. Each of the foamable particles includes a base particle and a coat layer covering a surface of the base particle. The base particles are non-foamable. The coat layers include a foamable group. The foamable group is bonded to the surfaces of the base particles through a bond including a bond represented by formula “—O—Si—”.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: December 24, 2019
    Assignee: KYOCERA Document Solutions
    Inventor: Yusuke Washino
  • Patent number: 10509338
    Abstract: Provided is a two-component developer for developing an electrostatic latent image containing: toner particles having toner mother particles and an external additive on a surface of the toner mother particles; and carrier particles, wherein the external additive contains alumina particles; the alumina particles are subjected to a surface modification with a hydrophobilizing agent; among the hydrophobilizing agent existing on the surface of the alumina particles after the surface modification, a ratio of the hydrophobilizing agent in a state of being liberated from the surface is 20% or less when extraction treatment is performed under a predetermined condition; the alumina particles have a number average primary particle diameter in the range of 5 to 60 nm; and the carrier particles have a resin covering layer, and the resin covering layer is formed with an alicyclic (meth)acrylate monomer.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: December 17, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Ikuko Sakurada, Satoshi Uchino, Shinya Obara, Futoshi Kadonome, Keiji Arai
  • Patent number: 10503090
    Abstract: Provided is a toner containing a colorant and a binder resin, wherein, in a wettability test of the toner with respect to a methanol/water mixed solvent, the methanol concentration when the transmittance of light at a wavelength of 780 nm is 50% is at least 5.0 volume % and not more than 30.0 volume %, and the interparticle force measured by rupturing a consolidation of the toner formed by compression of the toner with a load of 78.5 N is at least 1.0 nN and not more than 25.0 nN.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: December 10, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tsuneyoshi Tominaga, Akane Masumoto, Toshihiko Katakura, Shiro Kuroki, Kenta Kamikura, Sara Yoshida, Shinsuke Mochizuki, Tsutomu Shimano, Kentaro Yamawaki, Tomonori Matsunaga, Kunihiko Nakamura