Patents by Inventor Koji Takagi

Koji Takagi 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: 11143327
    Abstract: A cooling apparatus includes a circulation circuit, a pump, a flow rate adjustment valve, and a controller. The flow rate adjustment valve includes a valve member that rotates to change an open degree of the flow rate adjustment valve and a stopper that moves between a restriction position and a retraction position. The controller is configured to execute, when maintaining the open degree of the flow rate adjustment, a preparatory process of moving the stopper to the restriction position after arranging the stopper at the retraction position and arranging the valve member further in the valve-closing direction than the stopper through control of the pump discharge amount.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: October 12, 2021
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Noboru Takagi, Hirokazu Kato, Rihito Kaneko, Naoto Hisaminato, Hirokazu Ando, Masaaki Yamaguchi, Hirotaka Watanabe, Takahiko Aoyagi, Masahiro Yoshida, Koji Nunami, Naoto Yumisashi, Masafumi Yoshida
  • Patent number: 10835887
    Abstract: The present invention provides a method for producing water-absorbent resin particles that has a low stirring load, and can produce water-absorbent resin particles having a particle diameter within a specific range, with high productivity. The method for producing water-absorbent resin particles comprises adding an ethylenically unsaturated monomer all at once to a hydrocarbon dispersion medium mixed with a surfactant to perform reversed phase suspension polymerization, wherein the reversed phase suspension polymerization is performed in one step, or two or more steps, the surfactant is at least one selected from the group consisting of polyoxyethylene alkyl ether phosphates, alkali metal salts of polyoxyethylene alkyl ether phosphates, and alkaline earth metal salts of polyoxyethylene alkyl ether phosphates, and the surfactant has an HLB of 9 to 15.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: November 17, 2020
    Assignee: SUMITOMO SEIKA CHEMICALS CO., LTD
    Inventors: Maoki Hama, Koji Takagi, Kenta Kumazawa, Sho Isokawa
  • Publication number: 20190030512
    Abstract: The present invention provides a method for producing water-absorbent resin particles that has a low stirring load, and can produce water-absorbent resin particles having a particle diameter within a specific range, with high productivity. The method for producing water-absorbent resin particles comprises adding an ethylenically unsaturated monomer all at once to a hydrocarbon dispersion medium mixed with a surfactant to perform reversed phase suspension polymerization, wherein the reversed phase suspension polymerization is performed in one step, or two or more steps, the surfactant is at least one selected from the group consisting of polyoxyethylene alkyl ether phosphates, alkali metal salts of polyoxyethylene alkyl ether phosphates, and alkaline earth metal salts of polyoxyethylene alkyl ether phosphates, and the surfactant has an HLB of 9 to 15.
    Type: Application
    Filed: February 8, 2017
    Publication date: January 31, 2019
    Inventors: Maoki HAMA, Koji TAKAGI, Kenta KUMAZAWA, Sho ISOKAWA
  • Patent number: 8663748
    Abstract: In the formation of a conductive roller 1, a compound forming an elastomer by curing through an electron beam irradiation or a ultraviolet ray irradiation is applied onto an outside of a shaft member 2 to form an elastomeric coating layer 3R and then the elastomeric coating layer is cured through an irradiation of an electron beam or a ultraviolet ray to form an elastic layer, whereby the elastic layer can be formed cheaply without sacrificing precision of peripheral dimension to largely reduce the cost of the conductive roller.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: March 4, 2014
    Assignee: Bridgestone Corporation
    Inventors: Shuyou Akama, Hiroyuki Anzai, Hiroyuki Kanesugi, Koji Takagi
  • Patent number: 8376922
    Abstract: A conductive roller such as a developing roller, a charging roller or the like provided with a resin coating layer on a surface of an elastic layer, and more particularly to a conductive roller having the resin coating layer using an ultraviolet-curing type resin or an electron beam curing type resin and being obtained by contriving a structure of the resin coating layer, rendering the resin coating layer to contain microparticles, controlling the particle size of the microparticles, or forming the resin coating layer after the outer peripheral surface of the elastic layer is subjected to surface treatment.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: February 19, 2013
    Assignee: Bridgestone Corporation
    Inventors: Shuyou Akama, Hiroyuki Anzai, Hiroyuki Kanesugi, Hikaru Ishikawa, Junji Sakata, Koji Takagi, Takayuki Sugimura
  • Patent number: 8342309
    Abstract: There is provided a blind operating device for transmitting a rotation in both directions from an operation portion to a driving axis of the blind capable of making a diameter of a clutch spring smaller, and then capable of reducing operation load without breaking the clutch spring. The blind operating device includes an input shaft into which a rotation from a pulley is inputted, and a rotation axis that is provided coaxially with the input axis and is capable of transmitting the rotation to the driving axis. A clutch spring is wound around a fixed spring winding axis of a case and a rotation spring winding axis of the rotation axis. Linking and de-linking of the rotation axis and the case is made possible utilizing tightening and loosening of the clutch spring and one end of the clutch spring is linked to the rotation axis.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: January 1, 2013
    Assignee: Nichibei Co., Ltd.
    Inventor: Koji Takagi
  • Patent number: 8292791
    Abstract: An electrical conductive roller 1 that includes a shaft member 2 born at both end portions in a lengthwise direction thereof, and one or more elastic layers 3 arranged on a radially outside thereof, where each elastic layer has a glass transition point of not higher than ?40° C., and at least one of the elastic layers is constituted with a ultraviolet curing type resin containing an electrically conducting agent and a ultraviolet initiator.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: October 23, 2012
    Assignee: Bridgestone Corporation
    Inventors: Shuyou Akama, Hiroyuki Anzai, Koji Takagi
  • Patent number: 8059330
    Abstract: In the particles for display media used for an information display panel, in which at least one group of display media are sealed between two opposed substrates, at least one of two substrates being transparent, and, in which the display media, to which an electrostatic field is applied, are made to move so as to display information such as an image, a material having electric properties of a semiconductor is provided on a surface of the particles. According to the invention, since use is made of the particle whose surface has electric properties of a semiconductor, it is possible to maintain stably a surface charge of the particle for display media. As a result, it is possible to obtain an information display panel having a stable information display state such as an image.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: November 15, 2011
    Assignee: Bridgestone Corporation
    Inventors: Koji Takagi, Osamu Shiino, Taichi Kobayashi
  • Patent number: 7912411
    Abstract: A developing roller includes an ultraviolet-curing type resin layer and using a carbon-based electrically conducting agent for giving an electrical conductivity to the resin layer, as well as an imaging apparatus using the same. The developing roller 1 includes a shaft member 2 including a hollow cylindrical body or a solid cylindrical body of a resin containing an electrically conducting agent and a resin layer 4. The resin layer 4 is made of a resin having fine particles dispersed therein, wherein a ratio a/b of average particle size of fine particles a to a total thickness of resin layers b is greater than 2.0 and less than or equal to 5.0.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: March 22, 2011
    Assignee: Bridgestone Corporation
    Inventors: Koji Takagi, Shuyou Akama, Takuya Morooka
  • Patent number: 7907878
    Abstract: A developing roller includes an ultraviolet-curing type resin layer and using a carbon-based electrically conducting agent for giving an electrical conductivity to the resin layer, as well as an imaging apparatus using the same. The developing roller 1 includes a shaft member 2 of a metal pipe and a resin layer 4. The resin layer 4 is a resin having fine particles dispersed therein, wherein the ratio a/b of average particle size of fine particles a to total thickness of resin layers b is greater than 2.0 and less than or equal to 5.0.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: March 15, 2011
    Assignee: Bridgestone Corporation
    Inventors: Koji Takagi, Shuyou Akama
  • Patent number: 7809315
    Abstract: Provided are a conductive endless belt, a method of producing the same, and an image forming apparatus employing the same, the conductive endless belt having both desirable intended belt properties and surface properties, and being producible without known problems in terms of cost and quality. A conductive endless belt 100 is used as a transfer/transport conductive endless belt for a tandem system in which the conductive endless belt is circularly driven by a drive member so as to transport a recording medium held by the belt through electrostatic attraction to four differing image forming bodies, in which the toner images are sequentially transferred onto the recording medium. The conductive endless belt 100 is composed of a belt base 101 having thereon a resin layer 102, the resin layer 102 containing an ultraviolet or electron beam curable resin. The resin layer 102 preferably contains a conductive agent, specifically carbon black.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: October 5, 2010
    Assignee: Bridgestone Corporation
    Inventors: Takahiro Suzuki, Kunio Machida, Koji Takagi
  • Patent number: 7705823
    Abstract: Each embodiment relates to an image display device which comprises an image display panel, in which two or more groups of particles having different colors and different charge characteristics are sealed between two substrates, at least one of two substrates being transparent, and, in which the particles, to which an electrostatic field produced by a pair of electrodes provided on one or both substrates is applied, are made to fly and move so as to display an image.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: April 27, 2010
    Assignee: Bridgestone Corporation
    Inventors: Norio Nihei, Hajime Kitano, Gaku Yakushiji, Kazuya Murata, Koji Takagi, Yoshitomo Masuda, Takahiro Kawagoe, Reiji Hattori
  • Publication number: 20100037717
    Abstract: There is provided a blind operating device for transmitting a rotation in both directions from an operation portion to a driving axis of the blind capable of making a diameter of a clutch spring smaller, and then capable of reducing operation load without breaking the clutch spring. The blind operating device includes an input shaft into which a rotation from a pulley is inputted, and a rotation axis that is provided coaxially with the input axis and is capable of transmitting the rotation to the driving axis. A clutch spring is wound around a fixed spring winding axis of a case and a rotation spring winding axis of the rotation axis Linking and de-linking of the rotation axis and the case is made possible utilizing tightening and loosening of the clutch spring and one end of the clutch spring is linked to the rotation axis.
    Type: Application
    Filed: January 22, 2008
    Publication date: February 18, 2010
    Inventor: Koji Takagi
  • Publication number: 20100032698
    Abstract: In the particles for display media used for an information display panel, in which at least one group of display media are sealed between two opposed substrates, at least one of two substrates being transparent, and, in which the display media, to which an electrostatic field is applied, are made to move so as to display information such as an image, a material having electric properties of a semiconductor is provided on a surface of the particles. According to the invention, since use is made of the particle whose surface has electric properties of a semiconductor, it is possible to maintain stably a surface charge of the particle for display media. As a result, it is possible to obtain an information display panel having a stable information display state such as an image.
    Type: Application
    Filed: March 14, 2006
    Publication date: February 11, 2010
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Koji Takagi, Osamu Shino, Taichi Koybayashi, Kosaku Sugimura
  • Patent number: 7646530
    Abstract: In particles for image displaying used in an image display device, in which one or more kind of particles are sealed between opposed substrates, at least one substrate being transparent, and, in which the particles are made to fly and move so as to display an image, each particle has a micro-irregularity at its surface. Moreover, in an image display device, in which one or more kind of particles are sealed between opposed substrates, at least one substrate being transparent, and, in which the particles, to which an electrostatic field produced by two kinds of electrodes having different potentials is applied, are made to fly and move so as to display an image, use is made of each particle having a micro-irregularity at its surface.
    Type: Grant
    Filed: April 17, 2003
    Date of Patent: January 12, 2010
    Assignee: Bridgestone Corporation
    Inventors: Koji Takagi, Kazuya Murata, Norio Nihei, Gaku Yakushiji, Hajime Kitano, Yoshitomo Masuda, Takahiro Kawagoe
  • Patent number: 7591298
    Abstract: To provide an on-failure blind stopper system that allows reduction of depth of a head box and can be surely activated. A slider capable of moving vertically is disposed in a head box. The slider is pressed by a lifting/lowering cord and prevented from moving upward to permit a rotation shaft to rotate when the lifting/lowering cord is under tension. On the other hand, the slider moves upward to engage with the rotation shaft to prevent the rotation of the rotation shaft when the lifting/lowering cord sags.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: September 22, 2009
    Assignee: Nichibei Co., Ltd.
    Inventors: Ken-ichiro Egami, Koji Takagi
  • Patent number: 7525719
    Abstract: The present invention intends to provide particles for displaying images used in an image display device capable of displaying and eliminating repeatedly accompanied by flight and movement of particles utilizing Coulomb force, being superior in stability, particularly in repetition durability, memory characteristic stability, adaptability for temperature change, having capability of regulating charge amount, and accordingly, favorable images with sufficient contrast should be stably obtained. The present invention provides particles coated with a resin; specifying Span of particle diameter distribution, charge attenuation property, thermal change of the surface hardness, tensile break strength, Izod impact strength (with a notch), abrasion loss (Taber), tensile elastic modulus, flexural elastic modulus, or tear strength. The present invention also proposes about the structure of the particles.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: April 28, 2009
    Assignee: Bridgestone Corporation
    Inventors: Gaku Yakushiji, Hajime Kitano, Kazuya Murata, Norio Nihei, Koji Takagi, Yoshitomo Masuda, Takahiro Kawagoe
  • Publication number: 20080318748
    Abstract: [Task] It is provide an electrical conductive roller capable of forming an elastic layer cheaply to largely reduce a product cost without sacrificing a dimensional precision of an outer periphery. [Solution Means] An electrical conductive roller 1 comprises a shaft member 2 born at both end portions in a lengthwise direction thereof, and one or more elastic layers 3 arranged on a radially outside thereof, wherein each elastic layer has a glass transition point of not higher than ?40° C., and at least one of the elastic layers is constituted with a ultraviolet curing type resin containing an electrically conducting agent and a ultraviolet initiator.
    Type: Application
    Filed: March 28, 2006
    Publication date: December 25, 2008
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Shuyou Akama, Hiroyuki Anzai, Koji Takagi
  • Publication number: 20080304874
    Abstract: There are provided a developing roller capable of making useless a drying line in the formation of a resin layer and using a carbon-based electrically conducting agent for giving an electrical conductivity to the resin layer as well as an imaging apparatus using the same. The developing roller 1 comprises a shaft member 2 constituted with a hollow cylindrical body or a solid cylindrical body of a resin containing an electrically conducting agent and a resin layer 4. The resin layer 4 is made from a ultraviolet-curing type resin containing a carbon-based electrically conducting agent and a ultraviolet initiator, in which the ultraviolet initiator has a maximum wavelength in a ultraviolet absorption wavelength region of not less than 400 nm. The resin layer 4 may be made from an electron beam curing type resin containing the electrically conducting agent.
    Type: Application
    Filed: June 8, 2005
    Publication date: December 11, 2008
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Koji Takagi, Shuyou Akama, Takuya Morooka
  • Publication number: 20080292366
    Abstract: This invention relates to a conductive roller such as a developing roller, a charging roller or the like provided with a resin coating calyer on a surface of an elastic layer, and more particularly to a conductive roller having the resin coating layer using an ultraviolet-curing type resin or an electron beam curing type resin and being obtained by contriving a structure of the resin coating layer, rendering the resin coating layer to contain microparticles, controlling the particle size of the microparticles, or forming the resin coating layer after the outer peripheral surface of the elastic layer is subjected to surface treatment.
    Type: Application
    Filed: June 8, 2005
    Publication date: November 27, 2008
    Applicant: Bridgestone Corporation
    Inventors: Shuyou Akama, Hiroyuki Anzai, Hiroyuki Kanesugi, Hikaru Ishikawa, Junji Sakata, Koji Takagi, Takayuki Sugimura