Patents by Inventor Yuka Sako

Yuka Sako 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).

  • Heat-sealable layered polypropylene resin film and package
    Patent number: 9085124
    Abstract: A heat sealable polypropylene resin laminate film having good toughness and heat sealing strength and energy sufficient for packaging heavy goods, mainly fruits and vegetables, and a package made of such film, is a laminate film having three or more layers, a substrate layer made of a crystalline polypropylene resin, a heat sealable layer having a melting point of not more than 150° C., and an intermediate layer. The product of the tensile modulus of elasticity (GPa) in both orthogonal directions of the film is 3.1-6.0 (GPa)2, and the heat sealing energy is not less than 11N·cm/15 mm when the film is sealed, such that the heat sealing strength of the film is not less than 8N/15 mm.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: July 21, 2015
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Kenji Kawai, Hirokazu Oogi, Naonobu Oda, Tadashi Nakaya, Tooru Imai, Yuka Sako
  • Heat-Sealable Layered Polypropylene Resin Film and Package
    Publication number: 20070292640
    Abstract: A heat sealable polypropylene resin laminate film having good toughness and heat sealing strength and energy sufficient for packaging heavy goods, mainly fruits and vegetables, and a package made of such film, is a laminate film having three or more layers, a substrate layer made of a crystalline polypropylene resin, a heat sealable layer having a melting point of not more than 150° C., and an intermediate layer. The product of the tensile modulus of elasticity (GPa) in both orthogonal directions of the film is 3.1-6.0 (GPa)2, and the heat sealing energy is not less than 11N·cm/15 mm when the film is sealed, such that the heat sealing strength of the film is not less than 8N/15 mm.
    Type: Application
    Filed: February 18, 2005
    Publication date: December 20, 2007
    Applicant: Toya Boseki Kabushiki Kaisha
    Inventors: Kenji Kawai, Hirokazu Oogi, Naorobu Oda, Tadashi Nakaya, Tooru Imai, Yuka Sako