Patents by Inventor Yuichi Furukawa

Yuichi Furukawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11492446
    Abstract: An object of the present invention is to reduce or eliminate a defect (e.g., a void) by achieving (i) a semipreg and a prepreg each of which allows a reduction in residual volatile component and (ii) methods for producing the semipreg and the prepreg, respectively, and consequently to achieve (iii) a fiber-reinforced composite material which has high heat resistance and superior mechanical strength and a (iv) a method for producing the fiber-reinforced composite material. The present invention attains the above object by providing, for example, a semipreg containing: powders of an imide oligomer; and reinforcement fibers, the imide oligomer being represented by a specific general formula (1).
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: November 8, 2022
    Assignees: KANEKA CORPORATION, JAPAN AEROSPACE EXPLORATION AGENCY
    Inventors: Yoshio Furukawa, Takefumi Furuta, Takeshi Chiba, Rikio Yokota, Yuichi Ishida
  • Publication number: 20220308495
    Abstract: Provided is an electrophotographic electroconductive member including an electroconductive support and an electroconductive layer on the support, an electroconductive member is used, in which an electroconductive layer has a matrix comprising a first rubber, and domains dispersed in the matrix, the domains each comprising a second rubber and an electronic electroconductive agent, and for impedance measured by applying an AC voltage with an amplitude of 1 V to the electroconductive layer while varying frequencies between 1.0×10?2 Hz to 1.0×107 Hz under a specific environment, when a double logarithmic plot with a frequency on an abscissa and an impedance on an ordinate is obtained, a slope on a high frequency side is ?0.8 or more and —0.3 or less, and the impedance a low frequency side is from 1.0×103 to 1.0×107?.
    Type: Application
    Filed: June 8, 2022
    Publication date: September 29, 2022
    Inventors: Yuichi Kikuchi, Satoru Nishioka, Kenji Takashima, Kazuhiro Yamauchi, Masahiro Kurachi, Takumi Furukawa, Hiroaki Watanabe, Kenya Terada, Yuya Tomomizu, Toshimitsu Nakazawa
  • Publication number: 20220244658
    Abstract: Provided is an electrophotographic electro-conductive member including a support having an electro-conductive outer surface, and an electro-conductive layer. The electro-conductive layer has a matrix containing a crosslinked product of a first rubber and domains containing a crosslinked product of a second rubber and an electron conductive agent. When measuring an impedance by applying alternating voltage between the outer surface of the support and a platinum electrode on an outer surface of the electro-conductive layer while changing a frequency, a slope at specific frequencies is ?0.8 to ?0.3 in a double logarithmic plot, and an impedance at specific frequency range is 1.0×104? to 1.0×1011?. When measuring an impedance by applying alternating voltage between the outer surface of the support and a platinum electrode on an outer surface of the electrophotographic electro-conductive member while changing a frequency, an impedance at specific frequency range is 1.0×105? to 1.0×1011?.
    Type: Application
    Filed: April 11, 2022
    Publication date: August 4, 2022
    Inventors: Masaki Yamada, Yuichi Kikuchi, Kenji Takashima, Tetsuo Hino, Kazuhiro Yamauchi, Takumi Furukawa
  • Publication number: 20220244673
    Abstract: Provided is an electrophotographic electroconductive member, including: an electroconductive support; an electroconductive layer; and a surface layer in order, wherein an impedance is 1.0×103? to 1.0×108? at an outer surface of the electroconductive member, in the surface layer, an electronic electroconductive agent is dispersed, the electroconductive layer has a matrix containing a cross-linked product of a first rubber and domains each containing a cross-linked product of a second rubber and electroconductive particles, and wherein, and wherein among the domains observed in specified observation regions, 80% by number or more of the domains satisfy (1) and (2): (1) a proportion of sectional areas of the electroconductive particles with respect to the domain is 20% or more; (2) A/B is 1.00 to 1.10 when A is a perimeter of the domain and B is an envelope perimeter.
    Type: Application
    Filed: April 11, 2022
    Publication date: August 4, 2022
    Inventors: Kenji Takashima, Kazuhiro Yamauchi, Satoru Nishioka, Yuichi Kikuchi, Takumi Furukawa, Masaki Yamada
  • Patent number: 11397388
    Abstract: A process for producing an electrophotographic electroconductive member having an electroconductive support and an electroconductive layer in the order mentioned. The electroconductive layer has a matrix including a crosslinked product of a first rubber, and a domain including a crosslinked product of a second rubber and an electroconductive particle, the process including the steps of: providing a rubber mixture for forming the domain, including carbon black and the second rubber by kneading the carbon black and the second rubber; providing a rubber mixture for forming the matrix, including the first rubber; kneading the rubber mixture for forming the domain and the rubber mixture for forming the matrix to prepare a rubber composition having a matrix-domain structure; forming a layer of the rubber composition on a surface of the electroconductive support; and curing the layer of the rubber composition on the surface of the electroconductive support to form the electroconductive layer.
    Type: Grant
    Filed: October 7, 2021
    Date of Patent: July 26, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Satoru Nishioka, Masahiro Kurachi, Kenji Takashima, Yuichi Kikuchi, Kazuhiro Yamauchi, Kana Sato, Takumi Furukawa, Hiroaki Watanabe, Kenya Terada, Yuya Tomomizu, Toshimitsu Nakazawa
  • Patent number: 11385559
    Abstract: Provided is an electrophotographic electroconductive member including an electroconductive support and an electroconductive layer on the support, an electroconductive member is used, in which an electroconductive layer has a matrix comprising a first rubber, and domains dispersed in the matrix, the domains each comprising a second rubber and an electronic electroconductive agent, and for impedance measured by applying an AC voltage with an amplitude of 1 V to the electroconductive layer while varying frequencies between 1.0×10?2 Hz to 1.0×107 Hz under a specific environment, when a double logarithmic plot with a frequency on an abscissa and an impedance on an ordinate is obtained, a slope on a high frequency side is ?0.8 or more and ?0.3 or less, and the impedance a low frequency side is from 1.0×103 to 1.0×107?.
    Type: Grant
    Filed: October 16, 2020
    Date of Patent: July 12, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuichi Kikuchi, Satoru Nishioka, Kenji Takashima, Kazuhiro Yamauchi, Masahiro Kurachi, Takumi Furukawa, Hiroaki Watanabe, Kenya Terada, Yuya Tomomizu, Toshimitsu Nakazawa
  • Patent number: 11378910
    Abstract: A process cartridge is provided, which is configured to recover, with a developing member, developer remaining on an image bearing member after transfer of a developer image to a transfer receiving member, wherein a charging member has a shaft that is conductive and an elastic layer supported on the shaft and being in contact with the image bearing member; the elastic layer has a matrix containing a first rubber, and a plurality of domains containing a second rubber and an electron-conductive agent and interspersed within the matrix. The electric resistance of the domains is lower than the electric resistance of the matrix. The matrix is exposed on an outer surface of the elastic layer and forms multiple depressed portions, and the domains include a domains exposed at a bottom section of the depressed portion.
    Type: Grant
    Filed: October 13, 2020
    Date of Patent: July 5, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takashi Mukai, Takashi Hiramatsu, Shuhei Tokiwa, Takayuki Namiki, Takumi Furukawa, Yuichi Kikuchi, Kazuhiro Yamauchi
  • Publication number: 20220081640
    Abstract: A plunger lubricant for die casting includes a component (a), a component (b), a component (c), and water. The component (a) is one or two or more compounds selected from among mineral oils, synthetic hydrocarbons, and fatty acid esters. The component (b) is one or two or more compounds selected from among alkali metal salts of higher fatty acids or alkali metal salts of aliphatic hydroxy acids. The component (c) is an alkali metal salt of an oxoacid or polyoxoacid that is able to be dehydrated and condensed.
    Type: Application
    Filed: September 13, 2021
    Publication date: March 17, 2022
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Nippon Quaker Chemical, Ltd.
    Inventors: Soichiro ISHIDA, Eiji TABATA, Yuichi FURUKAWA, Katsumi HONGYO, Toshikazu IKEDA
  • Publication number: 20210263433
    Abstract: A lustrous developer according to an embodiment may include: a metallic pigment; and a binder resin. The lustrous developer includes small diameter particles smaller than a volume median diameter of the metallic pigment. A ratio of a volume of particles other than the small diameter particles in the lustrous developer to a volume of the entire lustrous developer is 90.297% or more and 99.314% or less. The volume median diameter of the metallic pigment is 5.91 ?m or less.
    Type: Application
    Filed: February 9, 2021
    Publication date: August 26, 2021
    Applicant: Oki Data Corporation
    Inventor: Yuichi FURUKAWA
  • Publication number: 20210142468
    Abstract: A manufacturing history management system according to an aspect of the present disclosure includes a data generation unit, a data storage unit, and a data extraction unit. The data generation unit generates manufacturing history data by associating internal void information specific to a product and manufacturing history information of the product with a product identification code. The data storage unit stores the manufacturing history data relating to a plurality of the products generated by the data generation unit. The data extraction unit checks the internal void information of the manufacturing history data of the plurality of products stored in the data storage unit against the internal void information of a predetermined product and extracts the manufacturing history data that matches the internal void information of the predetermined product from the manufacturing history data of the plurality of products stored in the data storage unit.
    Type: Application
    Filed: October 27, 2020
    Publication date: May 13, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kojiro Suzuki, Yuichi Furukawa
  • Patent number: 10596618
    Abstract: Provided is a method for producing a heat sink that can easily and effectively form a heat radiating film on the surface of a substrate without requiring enormous heat energy for increasing the temperature of the substrate. The method is a method for producing a heat sink having a substrate and a heat radiating film formed on the surface of the substrate, including a first step of casting a substrate by injecting molten metal into a cavity of molding dies; and a second step of applying a heat radiating coating to the substrate through spraying or dropping in the period from when the molding dies are opened after the casting until when the temperature of the substrate that has been cast becomes lower than the deposition temperature that is a temperature necessary to deposit the heat radiating coating on the substrate.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: March 24, 2020
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, MEC International Co., Ltd.
    Inventors: Naoaki Sugiura, Yuichi Furukawa, Mitsuhiro Kobayashi, Fumio Kawahara, Katsuhiro Takami
  • Patent number: 10509339
    Abstract: An image forming apparatus includes an image forming section and a controller. The image forming section selectively forms a first toner image to be printed on transfer paper other than plain paper with use of a toner and forms a second toner image to be printed on the plain paper with use of the toner. The controller controls the image forming section and thereby makes a first area density of the toner in the first toner image and a second area density of the toner in the second toner image differ from each other.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: December 17, 2019
    Assignee: Oki Data Corporation
    Inventors: Yuichi Furukawa, Kohei Kigawa
  • Patent number: 10322446
    Abstract: There is provided a nitrided layer repair method in which a molten metal is pressurized and solidified, and thus a nitrided layer formed on a cavity surface of a mold used to form a casting object is repaired. In the nitrided layer repair method, a nitriding source is applied to the cavity surface, and the cavity surface of the mold is nitrided by heating and pressurizing the cavity surface using the molten metal.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: June 18, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, TETRA CO., LTD, TOYOTA SCHOOL FOUNDATION
    Inventors: Eiji Tabata, Yuichi Furukawa, Yoshiki Tsunekawa, Hiroyuki Matsubara
  • Patent number: 10191402
    Abstract: An image forming apparatus for developing an image with developer includes a development part, a transfer part, and a fuser the medium. The developer is configured with a plurality of particles, an average circularity degree of the developer is ranged within 0.955 to 0.970, and a peeling rate (%) of the external additive by a following equation is 30.6% or less, peeling rate (%)=[1?(X/Y)]×100??(1) wherein X is an amount (weight %) of the external additive included in the developer after ultrasonic waves are applied, and Y is an amount (weight %) of the external additive included in the developer before the ultrasonic waves are applied.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: January 29, 2019
    Assignee: Oki Data Corporation
    Inventor: Yuichi Furukawa
  • Publication number: 20180348660
    Abstract: An image forming apparatus includes an image forming section and a controller. The image forming section selectively forms a first toner image to be printed on transfer paper other than plain paper with use of a toner and forms a second toner image to be printed on the plain paper with use of the toner. The controller controls the image forming section and thereby makes a first area density of the toner in the first toner image and a second area density of the toner in the second toner image differ from each other.
    Type: Application
    Filed: May 18, 2018
    Publication date: December 6, 2018
    Inventors: Yuichi FURUKAWA, Kohei KIGAWA
  • Publication number: 20180107133
    Abstract: An image forming apparatus includes a developer, an image bearing body, a charging member that charges a surface of the image bearing body, an exposure device that emits light to expose the surface of the image bearing body to form a latent image, a developer bearing body that bears the developer and develops the latent image to form a developer image, and a transfer portion that transfers the developer image from the image bearing body to a transfer body. The developer includes mother particles containing crystalline polyester resin as a binder resin, and a plurality of kinds of external additives containing silica and having different particle diameters. A value obtained by dividing a flowability of the developer by a weight percent of silica contained in the developer is in a range from 8.6 to 11.4. The weight percent of silica is measured by an energy dispersion type X-ray analyzer.
    Type: Application
    Filed: October 18, 2017
    Publication date: April 19, 2018
    Applicant: Oki Data Corporation
    Inventor: Yuichi FURUKAWA
  • Publication number: 20180085823
    Abstract: There is provided a nitrided layer repair method in which a molten metal is pressurized and solidified, and thus a nitrided layer formed on a cavity surface of a mold used to form a casting object is repaired. In the nitrided layer repair method, a nitriding source is applied to the cavity surface, and the cavity surface of the mold is nitrided by heating and pressurizing the cavity surface using the molten metal.
    Type: Application
    Filed: September 12, 2017
    Publication date: March 29, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota School Foundation, TETRA Co., Ltd.
    Inventors: Eiji TABATA, Yuichi FURUKAWA, Yoshiki TSUNEKAWA, Hiroyuki MATSUBARA
  • Publication number: 20180056363
    Abstract: Provided is a method for producing a heat sink that can easily and effectively form a heat radiating film on the surface of a substrate without requiring enormous heat energy for increasing the temperature of the substrate. The method is a method for producing a heat sink having a substrate and a heat radiating film formed on the surface of the substrate, including a first step of casting a substrate by injecting molten metal into a cavity of molding dies; and a second step of applying a heat radiating coating to the substrate through spraying or dropping in the period from when the molding dies are opened after the casting until when the temperature of the substrate that has been cast becomes lower than the deposition temperature that is a temperature necessary to deposit the heat radiating coating on the substrate.
    Type: Application
    Filed: August 23, 2017
    Publication date: March 1, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, MEC International Co., Ltd.
    Inventors: Naoaki SUGIURA, Yuichi FURUKAWA, Mitsuhiro KOBAYASHI, Fumio KAWAHARA, Katsuhiro TAKAMI
  • Publication number: 20170248863
    Abstract: An image forming apparatus for developing an electrostatic latent image with developer includes a development part, a transfer part, and a fuser. The developer includes first developer with a first coloring agent of yellow and a first external additive, and second developer with a second coloring agent of a color other than yellow and a second external additive. A first peeling rate of the first external additive by a following formula (1) is smaller than a second peeling rate of the second external additive by a following formula (2), the first peeling rate (%)=[1?(X1/Y1)]×100??(1) the second peeling rate (%)=[1?(X2/Y2)]×100??(2) X1, Y1 are amounts (weight %) of the first external additive in the first developer after/before the ultrasonic waves are applied, X2, Y2 are amounts (weight %) of the second external additive in the second developer after/before the ultrasonic waves are applied.
    Type: Application
    Filed: February 17, 2017
    Publication date: August 31, 2017
    Inventor: Yuichi FURUKAWA
  • Publication number: 20170248862
    Abstract: An image forming apparatus for developing an image with developer includes a development part, a transfer part, and a fuser the medium. The developer is configured with a plurality of particles, an average circularity degree of the developer is ranged within 0.955 to 0.970, and a peeling rate (%) of the external additive by a following equation is 30.6% or less, peeling rate (%)=[1 ?(X/Y)]×100 . . . ??(1) wherein X is an amount (weight %) of the external additive included in the developer after ultrasonic waves are applied, and Y is an amount (weight %) of the external additive included in the developer before the ultrasonic waves are applied.
    Type: Application
    Filed: February 17, 2017
    Publication date: August 31, 2017
    Inventor: Yuichi FURUKAWA