Seal tape for gas generator

摘要

A seal tape, a gas generator for a restraining apparatus using the seal tape, and a method for manufacturing a gas generator are provided. The seal tape closes, from an outside of the gas generator housing, a gas discharge port in a housing. The seal tape includes, a rupture portion for forming a door portion, and including a fragile portion and a rupture blocking portion at a tip of the fragile portion, a fixing support portion remaining attached to the housing, and the door portion bounded by the rupture portion and the fixing support portion being adjusted such that the gas discharge port is entirely open in a case where the door portion is opened.

主权项

1. A seal tape for closing, from the outside, a plurality of gas discharge ports formed in a housing of a gas generator for a restraining apparatus,
the seal tape comprising: a plurality of rupture portions for forming a plurality of door portions that open the gas discharge ports by opening when a pressure is applied in a thickness direction of the seal tape; a fixing support portion for forming, together with the plurality of rupture portions, the plurality of door portions, the fixing support portion remaining attached to the housing when a pressure is applied in the thickness direction; the plurality of rupture portions being formed by a combination of a plurality of linear fragile portions extending linearly from one side to the other side in a width direction of the seal tape with a distance in a longitudinal direction of the seal tape, and rupture blocking portions for blocking propagation of rupture at a tip of each of the plurality of linear fragile portions; the fixing support portion being a band-like portion that is continuous in the longitudinal direction and has a predetermined width from a side, in the width direction, where the rupture blocking portions are formed; the plurality of door portions corresponding to a region bounded by the rupture portions and the fixing support portion; and an arrangement of the plurality of door portions being adjusted such that when the plurality of gas discharge ports are closed from the outside by the seal tape, the gas discharge ports are entirely open in a case where the door portions are opened.