Patent ID: 8356408

Claim:
A method of manufacturing an inflator in which a pressurized gas for supplying to an air bag as an inflation gas is filled into a housing, comprising: a housing preparing step in which the housing having an opening for filling the pressurized gas is provided; a blocking body preparing step in which a blocking body which blocks the opening and through which a filling channel filling the pressurized gas into the housing is provided; a blocking body setting step which is after the housing preparing step and the blocking body preparing step and in which the blocking body is disposed in the opening such that an outlet port of the filling channel for the pressurized gas is oriented toward an inner side of the housing, while an inlet port of the filling channel for the pressurized gas is oriented toward an outer side of the housing, so that an interior and an exterior of the housing are communicated with each other through the filling channel; a blocking body abutment step which is after the blocking body setting step and in which the blocking body is abutted against a peripheral edge of the opening so as to ensure scalability between the blocking body and the peripheral edge of the opening; a filling nozzle disposing step which is after or simultaneously with the blocking body abutment step and in which a filling nozzle injecting the pressurized gas is pressed against a periphery of the inlet port of the blocking body so as to ensure sealability; a pressurized gas filling step which is after the filling nozzle disposing step and in which the pressurized gas is injected from the filling nozzle to fill the pressurized gas into the housing through the filling channel; a filling channel blocking step which is after the pressurized gas filling step and in which the blocking body is energized with a resistance-welding current so as to block the filling channel by fusion-solidifying an inner peripheral surface of the filling channel, to thereby resistance-weld inner peripheral wall portions of the filling channel to each other; and a blocking body fixing step for fixing the blocking body to the peripheral edge of the opening so as to allow sealability to be maintained, wherein the blocking body fixing step is performed simultaneously with the blocking body abutment step or after the blocking body abutment step, and wherein the filling nozzle also serves as an electrode for resistance-welding which is used in the filling channel blocking step.