| 摘要 |
PURPOSE:To reduce the number of cutting steps and facilitate a sewing process by folding a fabric so as to overlap a second surface with a third surface which are continuous to a first surface, and by sewing the edge of the outer peripheral part of the fabric so as to form a pressurized gas filling space. CONSTITUTION:A fabric which has a line-symmetric shape is formed with a center part 40 which defines a first surface, a pair of side parts 42, 44 which defines a second and third surfaces which are continuous to the center part. Further, the center part 40 is folded so that the side parts 42, 44 are overlapped with each other, and then the peripheral edge parts 46 of a side F, a side C and a side H of the side part 42 and sides J, D, L of the side part 44, the peripheral edge parts 50 of a side G of the side part 42 and a side K of the side part 44, and the sides of the center part 40 are sawn, respectively, so as to manufacture a bag defining therein a gas filling space. With this arrangement it is possible to facilitate the sewing.
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