Patents by Inventor Jiro TOMITA

Jiro TOMITA 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).

  • Easy-to-tear, unstretched resin film and laminate film for packaging material using the same
    Patent number: 11292908
    Abstract: This invention provides an easy-to-tear resin film. Such easy-to-tear resin film is an easy-to-tear, unstretched resin film composed of a blend of a polyethylene terephthalate-based resin with the second resin having a difference in SP value from the polyethylene terephthalate-based resin of 1.1 to 4.0 (cal/cm3)0.5. This invention also provides a laminate film 1B for a packaging material comprising the easy-to-tear, unstretched resin film 10 between the inner layer film 20 serving as a heat seal surface and the surface layer film 30 comprising an isophthalic acid-modified polyethylene terephthalate resin having a copolymerization ratio of isophthalic acid component of 0 mol % to 5 mol %.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: April 5, 2022
    Assignees: Toyo Seikan Group Holdings, Ltd., Toyo Seikan Co., Ltd.
    Inventors: Satoshi Kawamura, Jiro Tomita, Takafumi Ohsawa, Yoshihiro Ohta, Takuya Hara
  • EASY-TO-TEAR, UNSTRETCHED RESIN FILM AND LAMINATE FOR PACKAGING MATERIAL USING THE SAME
    Publication number: 20190185660
    Abstract: This invention provides an easy-to-tear resin film. Such easy-to-tear resin film is an easy-to-tear, unstretched resin film composed of a blend of a polyethylene terephthalate-based resin with the second resin having a difference in SP value from the polyethylene terephthalate-based resin of 1.1 to 4.0 (cal/cm3)0.5. This invention also provides a laminate film 1B for a packaging material comprising the easy-to-tear, unstretched resin film 10 between the inner layer film 20 serving as a heat seal surface and the surface layer film 30 comprising an isophthalic acid-modified polyethylene terephthalate resin having a copolymerization ratio of isophthalic acid component of 0 mol % to 5 mol %.
    Type: Application
    Filed: July 14, 2017
    Publication date: June 20, 2019
    Applicants: TOYO SEIKAN GROUP HOLDINGS, LTD., Toyo Seikan Co., Ltd.
    Inventors: Satoshi KAWAMURA, Jiro TOMITA, Takafumi OHSAWA, Yoshihiro OHTA, Takuya HARA