To easily join a gasket formed by the integral extrusion of a rubber magnet and a holder.
This gasket joining method is constituted by butting the end parts of gaskets, each of which is obtained by extrusion in a state that a magnet mainly comprising a rubber is covered with the thermoplastic resin holder, to mutually join them and includes an arranging process for arranging a thermoplastic resin sheet between the mutual end parts of both gaskets, a heating process for heating the end parts of both gaskets and the sheet and a welding process for mutually pressing the end parts of both gaskets to weld them. Further, in the arranging process, a first heater is arranged between the first surface of the sheet and the end part of the first gasket while a second heater is arranged between the second surface of the sheet and the second gasket. In the heating process, the end parts of both gaskets and the sheet are heated in this state and, in the welding process, the heaters are removed after heating to mutually press the end parts of both gaskets.
YOKOI YOSHIYUKI
IMAZU ATSUSHI
