Airbag Module With an Airbag Exhibiting a Vent Opening Closed in the Folded State by an Arrester Strap and Procedure of its Manufacture

An airbag formed of an airbag fabric forming part of an airbag module for installation into a motor vehicle having an inflation device for inflating the airbag in a folded-up state before its activation, comprising the airbag having at least one adaptive ventilation opening in the form of a slit made in the airbag fabric which, in the folded-up state, is held in at least a partially closed state by means of an arrester strap placed on the inside of the airbag having a first end and an opposite second end, the second end overlapping the adaptive ventilation opening and firmly connected with the airbag fabric at a securing location, wherein the arrester strap, beginning at the securing location is arranged on one side of the ventilation opening and is guided through a safety loop forming a safety loop opening lying at an opposite side of the ventilation opening, the safety loop being formed in part by the airbag fabric and a reinforcing blank enclosing the ventilation opening and firmly connected with the airbag fabric, the safety loop opening for the arrester strap is formed in part by an edge area of the reinforcing blank not connected to the airbag fabric, and the second end of the arrester strap is arranged between the reinforcing blank and the airbag fabric and is connected with both the airbag fabric and with the reinforcing blank in an area lying opposite with respect the edge area of the ventilation opening forming part of the safety loop opening.