Patent ID: 11180108

Abstract:
A preparatory folded form is a form of an airbag in an initial stage in a folding process which has not yet been reduced in size for storage in a steering wheel. The airbag includes a driver-side wall, and a vehicle-side wall which includes an inlet port in a vicinity of the center, and a plurality of taken-in portions towards the outer edge for reducing a length of the outer edge of the vehicle-side wall. The preparatory folded form includes an upper-surface portion composed of a central portion of the driver-side wall, a lower-surface portion composed of a peripheral portion of the inlet port in the vehicle-side wall, and at least one invaginated portion that is composed of a portion of the airbag located between the upper- and lower-surface portions including the taken-in portions, and is invaginated in between the upper- and lower-surface portions towards the inlet port. The upper-surface portion, invaginated portion and lower-surface portion lie over one another.