Patents Assigned to Showa Alumina Kabushiki Kaisha
  • Method of manufacturing brazable pipes and heat exchanger
    Patent number: 4945635
    Abstract: A process for producing brazeable pipes particularly for use in heat exchangers, the process comprising preparing a brazing sheet which comprises a core sheet coated with a brazing substance at least on one surface, forming a bulged portion of a semi-circular cross-section in the central section of the brazing sheet, providing apertures in the bulged portion for securing tube ends therein, and rolling the brazing sheet into a cylinder with its opposite ends being butt jointed to each other.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: August 7, 1990
    Assignee: Showa Alumina Kabushiki Kaisha
    Inventors: Mitsuru Nobusue, Noboru Kodachi