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.
May 16, 1985
Date of Patent:
September 23, 1986
Kakuichi Technical Development Service Kabushiki Kaisha