Patents by Inventor Katsuhiko Nakajima

Katsuhiko Nakajima 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: 9073266
    Abstract: A method and apparatus for welding members formed of thermoplastic resin material, with high welding strength and small strength variations. A laser welding apparatus 1 brings a first member 2 formed of a transmissive thermoplastic resin that transmits a laser beam into contact with a second member 3 formed of an absorptive thermoplastic resin that absorbs the laser beam, and joins the thermoplastic resin members by melting their contact surfaces 4 with the laser beam. The laser welding apparatus 1 further comprises a laser beam generator 10 for irradiating the contact surfaces with the laser beam shone from the side of the first member 3 so as to melt at least one of the contact surfaces of the first member and the second member.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: July 7, 2015
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, E. I. Du Pont De Nemours and Company
    Inventors: Toshio Watanabe, Katsuhiko Nakajima, Hideo Nakamura, Hiroshi Mori, Susumu Fujita, Mitsunobu Nakatani
  • Patent number: 7942998
    Abstract: A method and apparatus for welding members formed of thermoplastic resin material, with high welding strength and small strength variations. A laser welding apparatus 1 brings a first member 2 formed of a transmissive thermoplastic resin that transmits a laser beam into contact with a second member 3 formed of an absorptive thermoplastic resin that absorbs the laser beam, and joins the thermoplastic resin members by melting their contact surfaces 4 with the laser beam. The laser welding apparatus 1 further comprises a laser beam generator 10 for irradiating the contact surfaces with the laser beam shone from the side of the first member 3 so as to melt at least one of the contact surfaces of the first member and the second member.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: May 17, 2011
    Assignees: Toyota Jidosha Kabushiki Kaisha, E.I. du Pont de Nemours and Company
    Inventors: Toshio Watanabe, Katsuhiko Nakajima, Hideo Nakamura, Hiroshi Mori, Susumu Fujita, Mitsunobu Nakatani
  • Publication number: 20100307676
    Abstract: A method and apparatus for laser welding two members made of thermoplastic resin material whereby high welding strength can be achieved and strength variations can be reduced. A first member 2 comprised of a transmissive thermoplastic resin that transmits a laser beam is brought into contact with a second member 3 comprised of an absorptive thermoplastic resin that absorbs a laser beam. Contact surfaces 4 are melted with a laser beam so as to join the two members. At least the contact surfaces 4 of the two members are pre-heated by a pre-heating means 20 at a temperature lower than the melting temperature of the contact surfaces. The contact surfaces 4 are then irradiated with a laser beam R generated by a laser beam generator 10 that is shone from the side of the first member so as to melt at least one of the contact surfaces of the two members.
    Type: Application
    Filed: August 20, 2010
    Publication date: December 9, 2010
    Inventors: Toshio Watanabe, Katsuhiko Nakajima, Hideo Nakamura, Hiroshi Mori, Susumu Fujita, Mitsunobu Nakatani
  • Publication number: 20100292411
    Abstract: Double bonds, which are included in the respective isoprene units of natural rubber, are converted into epoxy groups, and are subsequently converted into hydroxyl groups by hydrolyzing the resulting epoxy groups. Since it is possible to introduce hydroxyl groups into all of the double bonds securely, and moreover since it is possible to introduce many hydroxyl groups into them, it is possible to utilize the setting for films for food packaging that are good in terms of gas non-permeability.
    Type: Application
    Filed: January 16, 2009
    Publication date: November 18, 2010
    Inventors: Katsuhiko Nakajima, Masatoshi Matsuda, Yoshimasa Yamamoto, Seiichi Kawahara
  • Publication number: 20080302484
    Abstract: A method and apparatus for welding members formed of thermoplastic resin material, with high welding strength and small strength variations. A laser welding apparatus 1 brings a first member 2 formed of a transmissive thermoplastic resin that transmits a laser beam into contact with a second member 3 formed of an absorptive thermoplastic resin that absorbs the laser beam, and joins the thermoplastic resin members by melting their contact surfaces 4 with the laser beam. The laser welding apparatus 1 further comprises a laser beam generator 10 for irradiating the contact surfaces with the laser beam shone from the side of the first member 3 so as to melt at least one of the contact surfaces of the first member and the second member.
    Type: Application
    Filed: August 12, 2008
    Publication date: December 11, 2008
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Toshio WATANABE, Katsuhiko NAKAJIMA, Hideo NAKAMURA, Hiroshi MORI, Susumu FUJITA, Mitsunobu NAKATANI
  • Publication number: 20080254338
    Abstract: In an ion-conducting membrane, a polystyrene portion having ion conductivity and a polyethylene portion that forms a membrane skeleton together form a microphase-separated structure.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 16, 2008
    Inventors: Hiroki Uehara, Katsuhiko Nakajima, Masatoshi Matsuda
  • Publication number: 20070137779
    Abstract: A process for laser welding objects wherein a polymeric film having an absorptivity of 5 percent or less at the wavelength of the laser used is placed between the objects welded prior to welding.
    Type: Application
    Filed: October 16, 2006
    Publication date: June 21, 2007
    Inventors: Hiroshi Mori, Mitsunobu Nakatani, Hiroyuki Sumi, Katsuhiko Nakajima, Hideo Nakamura, Toshio Watanabe
  • Publication number: 20070131348
    Abstract: A process for laser welding objects comprising the thermoplastic polymer compositions comprising a material having voids.
    Type: Application
    Filed: October 16, 2006
    Publication date: June 14, 2007
    Inventors: Katsuhiko Nakajima, Hideo Nakamura, Toshio Watanabe, Hiroshi Mori, Mitsunobu Nakatani, Makiko Ueda
  • Publication number: 20070084553
    Abstract: A method and apparatus for laser welding, whereby high welding strength, a low degree of variation in strength, and lack of occurrence of burrs can be achieved when two members formed of thermoplastic resin material are welded, are provided. In a laser welding apparatus 1, contact surfaces 4 of a first member 2 formed of transmissive thermoplastic resin that transmits a laser beam and a second member 3 formed of absorptive thermoplastic resin that absorbs a laser beam are joined by melting via laser beam R. The apparatus is equipped with a casing 5 that accommodates the first member and the second member, a vacuum pump 6 that reduces the pressure inside the casing, and a laser beam generator 10, whereby at least one of the contact surfaces of the first member and the second member becomes melted.
    Type: Application
    Filed: October 18, 2006
    Publication date: April 19, 2007
    Inventors: Katsuhiko Nakajima, Toshio Watanabe, Hideo Nakamura, Hiroshi Mori, Susumu Fujita, Mitsunobu Nakatani
  • Publication number: 20070084551
    Abstract: A method and apparatus for laser welding two members made of thermoplastic resin material whereby high welding strength can be achieved and strength variations can be reduced. A first member 2 comprised of a transmissive thermoplastic resin that transmits a laser beam is brought into contact with a second member 3 comprised of an absorptive thermoplastic resin that absorbs a laser beam. Contact surfaces 4 are melted with a laser beam so as to join the two members. At least the contact surfaces 4 of the two members are pre-heated by a pre-heating means 20 at a temperature lower than the melting temperature of the contact surfaces. The contact surfaces 4 are then irradiated with a laser beam R generated by a laser beam generator 10 that is shone from the side of the first member so as to melt at least one of the contact surfaces of the two members.
    Type: Application
    Filed: October 18, 2006
    Publication date: April 19, 2007
    Inventors: Toshio Watanabe, Katsuhiko Nakajima, Hideo Nakamura, Hiroshi Mori, Susumu Fujita, Mitsunobu Nakatani
  • Publication number: 20070084552
    Abstract: A method and apparatus for welding members formed of thermoplastic resin material, with high welding strength and small strength variations. A laser welding apparatus 1 brings a first member 2 formed of a transmissive thermoplastic resin that transmits a laser beam into contact with a second member 3 formed of an absorptive thermoplastic resin that absorbs the laser beam, and joins the thermoplastic resin members by melting their contact surfaces 4 with the laser beam. The laser welding apparatus 1 further comprises a laser beam generator 10 for irradiating the contact surfaces with the laser beam shone from the side of the first member 3 so as to melt at least one of the contact surfaces of the first member and the second member.
    Type: Application
    Filed: October 18, 2006
    Publication date: April 19, 2007
    Inventors: Toshio Watanabe, Katsuhiko Nakajima, Hideo Nakamura, Hiroshi Mori, Susumu Fujita, Mitsunobu Nakatani