| 摘要 |
PURPOSE:To enable an expanding part to be unforcedly freely folded at a folding seal after it is expanded by blowing air to make an air bag expandable and foldable. CONSTITUTION:A self-sealing air blow tube 10 is inserted through between two films 1, 2 having a predetermined width and a predetermined length in the length direction of the film. The films are sealed at both side edges 3, 4 thereof. The both films are sealed in the width direction thereof at a plurality of crosswise partitioning lines 5, 6 crossing the films in the width direction thereof to be partitioned into a plurality of expanding parts 7 isolated from each other and continuously arranged. One or more folding seals 8-1, 8-2... are formed across each of the expanding parts 7 between the partitioning lines 5, 6 on the both sides thereof to divide the expanding part 7 into two or more partitioned expanding parts 7-1, 7,2, 7-3.... |
