Patents by Inventor Nagamasa Kataoka

Nagamasa Kataoka 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).

  • Method of bending glass plate
    Patent number: 4173461
    Abstract: As a first step to bend a glass along a line traversing the plate, external heat is applied to the glass plate such that a narrow zone containing the entire length of the bending line is heated more intensely than the remaining area to reach a temperature at which the glass does not yet soften but exhibits an appreciable lowering of its electrical resistivity. Then an electric current is caused to flow through the glass in the intensely heated zone from one terminal of the bending line to the other terminal, until the glass is softened only in this zone, i.e. along the bending line by the Joule effect of the current. In this state, desired manner of bending is achieved by the use of a suitably shaped bending die.
    Type: Grant
    Filed: May 25, 1978
    Date of Patent: November 6, 1979
    Assignees: Agency of Industrial Science and Technology, Central Glass Company, Limited
    Inventors: Yoshihiro Ebata, Tsutomu Ueno, Nagamasa Kataoka, Akimasa Akao
  • Process for welding plate glasses together
    Patent number: 4173460
    Abstract: The contacted edge portions of plate glasses to be joined are locally heated to a temperature higher than in the other portions of the plate glasses, after the whole of the plate glasses is heated. Electric current is then passed to the edge portions in order to further heat the edge portions so that the edges of the plate glasses are molten and welded together.
    Type: Grant
    Filed: May 25, 1978
    Date of Patent: November 6, 1979
    Assignees: Agency of Industrial Science and Technology, Central Glass Company, Limited
    Inventors: Yoshihiro Ebata, Tsutomu Ueno, Nagamasa Kataoka, Akimasa Akao
  • Process and apparatus for heat treating edge of plate glass
    Patent number: 4165228
    Abstract: The edge portion of a plate glass is locally heated to a temperature higher than that in the other portion of the plate glass, after the whole of the plate glass is heated. Electric current is thereafter applied to the edge portion of the plate glass in order to further heat the edge portion so that the edge of the plate glass is slightly melted.
    Type: Grant
    Filed: May 25, 1978
    Date of Patent: August 21, 1979
    Assignees: Agency of Industrial Science and Technology, Central Glass Company Limited
    Inventors: Yoshihiro Ebata, Tsutomu Ueno, Nagamasa Kataoka, Akimasa Akao