US 11,850,806 B2
Method for manufacturing air bag, air bag, and vehicle seat apparatus
Yasuhito Kurematsu, Kariya (JP); Makoto Sakai, Kariya (JP); Ryosuke Mizuno, Kariya (JP); Satoshi Masuda, Kariya (JP); Tomokazu Seki, Kariya (JP); Masaaki Hasegawa, Kariya (JP); Tsuyoshi Yamamoto, Kariya (JP); and Tomoko Kanbara, Kariya (JP)
Assigned to AISIN CORPORATION, Kariya (JP)
Filed by AISIN CORPORATION, Aichi (JP)
Filed on Mar. 18, 2021, as Appl. No. 17/205,104.
Claims priority of application No. 2020-086060 (JP), filed on May 15, 2020.
Prior Publication US 2021/0354401 A1, Nov. 18, 2021
Int. Cl. B29C 65/00 (2006.01); B60N 2/90 (2018.01); B29L 31/58 (2006.01); B29L 31/44 (2006.01)
CPC B29C 66/436 (2013.01) [B29C 66/8322 (2013.01); B60N 2/914 (2018.02); B60N 2/976 (2018.02); B29L 2031/443 (2013.01); B29L 2031/58 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for manufacturing an air bag, comprising:
forming a bag portion surrounded by a welded portion extending in an annular shape by pressing at least one welding mold against two sheet materials arranged to be stacked from a stacking direction of the sheet materials,
wherein the welding mold is pressed against the sheet materials to form the welded portion including a welding bead portion protruding to an inside of the bag portion between the sheet materials, and
wherein a pressing surface of the welding mold against the sheet materials is provided with a slope portion facing in the stacking direction of the sheet materials and in a direction of the inside of the bag portion at a position further on an outside of the bag portion than a position at which the welding bead portion is formed.