Patent ID: 7837229

Claim:
A wrapping sheet to maintain a shape of a folded air bag and tearable when subjected to pressure at inflation of the air bag, wherein an engagement piece is fitted on attachment shafts, projecting from the air bag, for attachment to a storage portion for storing the folded air bag, so that when the engagement piece has been fitted on the attachment shafts, the shape of the folded air bag is maintained; wherein a coupling portion is arranged for coupling with part of the air bag to form a coupled portion, and the engagement piece is located at a portion extending from the coupled portion; and wherein a folding form control portion includes an auxiliary engagement portion to be fitted either to the attachment shafts or to a jig in a vicinity of the folded air bag, and engages the auxiliary engagement portion with the attachment shafts, or the jig, in order to control the shape of the air bag while being folded, the air bag having a first folded part and a second folded part, the first folded part being restrained so as to not be unfolded by the folding form control portion of the wrapping sheet, and the second folded part being formed by further folding the first folded part across the folds thereof, the second folded part being restrained on a face thereof opposite to the first folded part by a portion of the wrapping sheet extending from the coupled portion at the first folded part and around the second folded part to the engagement piece.