Patents by Inventor Mika NAGASHIMA

Mika NAGASHIMA 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).

  • Tire vulcanization mold and manufacturing method for tire
    Patent number: 11931979
    Abstract: A tire vulcanization mold in which a surface roughness in the groove molding portion of the tread molding surface is made smaller than a surface roughness in the land portion molding portion, in which a surface roughness in the groove molding portion is minimized to 0.12 ?m or less in a range including at least a main groove molding portion, and in which a surface roughness in the land portion molding portion is made to be 3.2 ?m or more, is used to manufacture a tire, and when cleaning the tread molding surface, the tread molding surface is irradiated with a laser beam to remove contaminant adhered to the tread molding surface.
    Type: Grant
    Filed: July 1, 2020
    Date of Patent: March 19, 2024
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Tsubasa Kitahara, Yoshiaki Matsumoto, Mika Nagashima, Mitsuo Tsuji, Yoshinori Izumi, Rinko Kushida, Koichiro Miyoshi
  • TIRE VULCANIZATION MOLD AND MANUFACTURING METHOD FOR TIRE
    Publication number: 20220305750
    Abstract: A tire vulcanization mold in which a surface roughness in the groove molding portion of the tread molding surface is made smaller than a surface roughness in the land portion molding portion, in which a surface roughness in the groove molding portion is minimized to 0.12 ?m or less in a range including at least a main groove molding portion, and in which a surface roughness in the land portion molding portion is made to be 3.2 ?m or more, is used to manufacture a tire, and when cleaning the tread molding surface, the tread molding surface is irradiated with a laser beam to remove contaminant adhered to the tread molding surface.
    Type: Application
    Filed: July 1, 2020
    Publication date: September 29, 2022
    Inventors: Tsubasa KITAHARA, Yoshiaki MATSUMOTO, Mika NAGASHIMA, Mitsuo TSUJI, Yoshinori IZUMI, Rinko KUSHIDA, Koichiro MIYOSHI