Patent ID: 8672350

Claim:
A cylindrical filter for a gas generator, comprising: a porous metal plate forming a plurality of layers, the porous metal plate having, throughout an entire length thereof, a predetermined region S 1 in at least one end in a height direction and a region S 2 other than the region S 1 , the predetermined region S 1 being provided with first holes, and the region S 2 being provided with second holes, a compression strength of the predetermined region S 1 being smaller than that of the region S 2 , the porous metal plate being configured to be provided within a gas generator housing so as to be press-contacted and fixed between a top plate and a bottom plate of the gas generator housing such that the region S 1 is squashed in an axial direction and the region S 2 retains an original shape, the porous metal plate being selected from a group consisting of expanded metal, metal lath, and perforated metal, and the predetermined region S 1 corresponding to a region of 5 to 20% in length from both ends with respect to an overall height.