A completely folded body of an airbag, includes: an outer peripheral wall including a vehicle body side wall portion, and a receiving side wall portion. An outer peripheral edge side in a state where the receiving side wall portion is superimposed on the vehicle body side wall portion and is flatly deployed is subjected to radial folding and folded. An accommodation recess portion for accommodating an upper portion on a gas supply port side of an inflator is provided on a bottom surface. A radially-folded folded portion is disposed so as to surround a circumference of an intermediate portion from a base portion near the center of the ceiling surface of the accommodation recess portion in a linear supply path, for supplying the inflation gas from the inflator, to a tip portion disposed on an inner surface side near the center of the receiving side wall portion.

A method of manufacturing a folded airbag comprising the steps of: providing an airbag cushion; heating the airbag material, folding the heated airbag material; compressing the folded airbag material obtained in step c) and optionally cooling the compressed airbag.

A curtain airbag system of a vehicle is provided and omits a front or rear pillar area of a roof/side frame for a space for accommodating an airbag cushion. The airbag cushion is guided by a connection tether for a deployment direction to deploy the airbag cushion to a protection zone for an occupant. Additionally, the airbag cushion is folded in a zigzag form to expose the connection tether, thereby guiding the airbag cushion for the deployment direction and securing a deployment speed.

A knee protection airbag device includes an airbag. When the air bag is accommodated, an occupant side wall portion and a vehicle body side wall portion are overlapped and expanded flatly and roll-folding is performed such that an upper edge side of a knee receiving portion side approaches a lower edge side of the mounting portion side, end side portions on left and right sides of the roll-folded roll folding portion are formed as folded portions which fold over a central portion near a center in a left-right direction of the roll folding portion to form a folding completed body. A joining between a first overlapping portion and a tip side part of the airbag is released when an inflation gas flows into the airbag and when a fold of a first fold is canceled and the first overlapping portion deviates from a rear area of the central portion.

It is provided a method for manufacturing a gas bag module of a vehicle occupant restraint system. The method comprising the steps: providing a gas bag; prefolding the gas bag; pressing at least a portion of the prefolded gas bag under the influence of heat; and folding the pressed gas bag to a final dimension.

A completely folded body of an airbag, includes: an outer peripheral wall including a vehicle body side wall portion, and a receiving side wall portion. An outer peripheral edge side in a state where the receiving side wall portion is superimposed on the vehicle body side wall portion and is flatly deployed is subjected to radial folding and folded. An accommodation recess portion for accommodating an upper portion on a gas supply port side of an inflator is provided on a bottom surface. A radially-folded folded portion is disposed so as to surround a circumference of an intermediate portion from a base portion near the center of the ceiling surface of the accommodation recess portion in a linear supply path, for supplying the inflation gas from the inflator, to a tip portion disposed on an inner surface side near the center of the receiving side wall portion.

An airbag device includes an airbag provided with an inlet port of inflation gas, an inflator which includes gas outlet ports in an upper region of the body, a bag holder which is formed from synthetic resin and includes an insert opening for receiving the inflator body, and an airbag cover which includes a door openable at airbag deployment. The bag holder includes a support board which supports a bottom surface of the airbag as folded including a periphery of the inlet port, and a gas guide tube which extends upward from a periphery of the insert opening and is fitted in the inlet port of the airbag. The guide tube as fitted in the inlet port is greater in height than the upper region of the inflator body. The airbag further includes, in a vicinity of the bottom surface, a joint section which is joined to the support board.

A vehicle occupant restraint system comprises an airbag module (12) including an inflator (18) and a frontally acting airbag (16), wherein the airbag (16) includes an inflator-side inflation end (46) as well as a first free end (56) located in the inflated state of the airbag (16) within a vehicle interior. In a first period during deployment of the airbag (16), the first free end (56) is still connected via a tether (74) to the airbag module (12), wherein the tether (74) becomes detached upon reaching a predetermined tensile force. When folding the airbag (16), the non-inflated airbag (16) is spread so that a second free end (58) is maximally distant from the inflation end (46) and a first outer wall portion is stretched in the longitudinal direction of the airbag (16), and the first free end (56) is located in the vicinity of the inflation end (46) and a second outer wall portion is stretched in the longitudinal direction of the airbag (16), wherein a third outer wall portion of the airbag (16) is folded back onto itself at least in a portion. The two lateral areas of the spread airbag (16) are folded toward the center, and subsequently the airbag (16) is rolled up from the second free end (58).

In a method of folding an airbag (10) for a vehicle occupant restraint system, especially of curtain-type side airbag, to form an airbag package (12), the airbag (10) is rolled and/or folded to form an airbag roll (12) having a first volume (V.sub.1). The airbag roll (12) is fed to a pressing device (14) in which the airbag roll (12) is compressed to form an airbag package (12) having a second volume (V.sub.2) which is smaller than the first volume (V.sub.1). The airbag roll (12) and, resp., the airbag package (12) is heated within the pressing device (14) and the airbag package (12) is cooled, with the airbag package (12) retaining the second volume (V.sub.2) when it is removed from the pressing device (14; 114). The pressing device (14) includes a pressing mold or a molding shaft (18) whose height substantially corresponds to the desired height of the finished airbag packages (12), a heating unit (20) for heating the airbag packages (12) and a cooling device (22) for cooling the airbag packages (12).

A method for folding a driver airbag may include: forming a tuck-in folding part by pushing an upper end portion of an airbag cushion part into the airbag cushion part; folding the tuck-in folding part toward the opposite side with respect to a driver seat; temporarily attaching the tuck-in folding part to the airbag cushion part; injecting gas into the airbag cushion part, and compressing the airbag cushion part such that the airbag cushion part maintains a plate shape; and folding the airbag cushion part while moving a folding jig disposed in a radial shape around the circumference of the airbag cushion part toward an inflator connection part.