Patents by Inventor Tadashi Takekawa

Tadashi Takekawa 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).

  • Publication number: 20240025137
    Abstract: Provided is a manufacturing method for efficiently manufacturing a thermoplastic resin composite containing a thermoplastic resin and a fiber by pultrusion. In the manufacturing method according to an embodiment, fibers 10 are continuously impregnated with a thermoplastic resin-forming composition containing an active hydrogen component and a diisocyanate component, after impregnation, the fibers 10 are caused to pass through a heat-molding unit 30 to perform polymerization of a thermoplastic resin and molding of a thermoplastic resin composite 12, and the thermoplastic resin composite 12 is continuously pulled out from the heat-molding unit 30. In the method, a heating temperature of the heat-molding unit 30 is set to be lower than a glass transition temperature of the thermoplastic resin, so that the thermoplastic resin of the thermoplastic resin composite 12 pulled out from the heat-molding unit 30 is in a glassy state.
    Type: Application
    Filed: November 12, 2021
    Publication date: January 25, 2024
    Applicant: DKS Co. Ltd.
    Inventors: Norio HIRAYAMA, Tadashi TAKEKAWA, Yoshinori YAMADA, Yudai SHIOJI
  • Patent number: 11831040
    Abstract: The safety of an assembled battery is improved. An insulating sheet 10 is to be interposed between battery cells 20 having planar surfaces 34 facing each other and is formed of a resin composition containing an inorganic filler. An assembled battery 50 includes a plurality of battery cells 20 having planar surfaces 34 and the insulating sheet 10. The insulating sheet 10 is interposed in at least one facing section 36 of the plurality of battery cells 20 whose planar surfaces 34 are arranged to face each other.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: November 28, 2023
    Assignee: DKS Co. Ltd.
    Inventors: Akiyoshi Nishikawa, Tetsuya Higashizaki, Mana Ishino, Tadashi Takekawa, Toshikazu Akao
  • Publication number: 20220231380
    Abstract: The safety of an assembled battery is improved. An insulating sheet 10 is to be interposed between battery cells 20 having planar surfaces 34 facing each other and is formed of a resin composition containing an inorganic filler. An assembled battery 50 includes a plurality of battery cells 20 having planar surfaces 34 and the insulating sheet 10. The insulating sheet 10 is interposed in at least one facing section 36 of the plurality of battery cells 20 whose planar surfaces 34 are arranged to face each other.
    Type: Application
    Filed: August 20, 2019
    Publication date: July 21, 2022
    Applicant: DKS Co. Ltd.
    Inventors: Akiyoshi NISHIKAWA, Tetsuya HIGASHIZAKI, Mana ISHINO, Tadashi TAKEKAWA, Toshikazu AKAO
  • Publication number: 20210328291
    Abstract: A high-quality battery pack is efficiently produced without using any potting material. A battery cover sheet 10 is a sheet member formed of a resin composition containing an inorganic filler, and has flexibility enough to cover, along the shape of the outer surface of a battery (such as a cylindrical lithium-ion battery 20A), at least partially the outer surface. For example, of the outer surface of the cylindrical lithium-ion battery 20A except for both end surfaces, the outer peripheral surface is covered with the battery cover sheet 10 and a seam 10a is fixed with a fixing member such as an adhesive tape 11, to thereby form a sheet-covered battery 30A. In this case, the battery cover sheet 10 forms a battery holder.
    Type: Application
    Filed: September 9, 2019
    Publication date: October 21, 2021
    Applicant: DKS Co. Ltd.
    Inventors: Akiyoshi NISHIKAWA, Tetsuya HIGASHIZAKI, Mana ISHINO, Tadashi TAKEKAWA, Toshikazu AKAO
  • Patent number: 6756326
    Abstract: In garments with a foamed net used as a clothing material (inter-lining), a clothing material is provided that is light-weight and easy-moving, and has improved warmth retaining property, cushioning property and buoyancy without spoiling the feeling of the garment to the wearer and does not cause cost increases or disadvantages in production. A foamed net in a meshed shape being constituted with a plurality of foamed strands intersected and simultaneously welded together at intersection points is inserted between an outer cloth and a lining cloth. The foamed strands may have a cross section form of elliptical shape with different ratios of height to width and the foamed strands are welded together so that the height direction of the cross section form may be orthogonal or almost orthogonal to the face of the net.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: June 29, 2004
    Inventors: Susumu Taguchi, Tadashi Takekawa, Kouji Sako, Takahiro Ueda
  • Publication number: 20020119718
    Abstract: In garments with foamed net used as a clothing material (inter-lining), a clothing material is provided that give a light-weight and easy-moving, and improved warmth retaining property, cushioning property and buoyancy without spoiling wearer's wearing feeling, and that do not give a cost rise or disadvantages in production.
    Type: Application
    Filed: December 14, 2001
    Publication date: August 29, 2002
    Inventors: Susumu Taguchi, Tadashi Takekawa, Kouji Sako, Takahiro Ueda