Patent ID: 7338085

Claim:
An apparatus for fusion-bonding a first cylindrical resin member and a second ring shaped or cylindrical resin member together through electric current-conduction-heating for jointing the members together, comprising: a. means for interposing a meshed or mesh-patterned metal wire as a resistance heating element in a junction site between the first cylindrical resin member and the second ring shaped or cylindrical resin member so that the resistance heating element contacts joint surfaces of at least circular circumferential surfaces of said junction site, and abutting the resin members together to maintain the abutted state of the members; and b. means for conducting electric current through said meshed or mesh-patterned metal wire to heat the metal wire to a temperature sufficient for both the resin members to fusedly fill mesh openings of said wire in gaps formed on the surfaces not in press-contact with said resistance heating element in said joint surfaces, wherein a third ring shaped resin member having a divided form into 2 or more sections is disposed on the junction site, and wherein said resistance heating element is interposed on a corresponding joint surface of the divided section.