Patents Assigned to Kakuichi Technical Development Service Kabushiki Kaisha
  • Patent number: 4613389
    Abstract: A process for the manufacture of flexible tubes including a main body of a rubber material and a reinforcing element of a hard resin material in which the reinforcing element is embedded at least partly in the main body in a form of helical coil and adjoined thereto to form an integral body of the flexible tube. The flexible tube is manufactured by helically winding a composite web of a rubber strip and a hard resin strip adjoined to each lateral side end of the rubber strip with the web being in a plastic condition so that a lateral end portion of the resin strip in the web of each turn is made to be in contact with and adjoined to that of the preceding turn.
    Type: Grant
    Filed: May 16, 1985
    Date of Patent: September 23, 1986
    Assignee: Kakuichi Technical Development Service Kabushiki Kaisha
    Inventor: Kenichi Tanaka