Patent ID: 7763554

Claim:
Method for manufacturing an airbag comprising: providing a first longitudinal fiber web comprising a first substrate layer with arranged thereon and/or embedded therein a first set of mutually substantially parallel fibers with mutual intermediate space; providing a second longitudinal fiber web comprising a second substrate layer with arranged thereon and/or embedded therein a second set of mutually substantially parallel fibers with mutual intermediate space; cutting web segments from the second longitudinal fiber web; positioning the web segments of the second longitudinal fiber web onto the said first longitudinal fiber web, in such a way that the fibers of those web segments make an angle unequal to zero and preferably at least substantially equal to 90° with the fibers of the first longitudinal fiber web; performing a heat treatment, so that at least the substrate layers of the two webs melt together, in order to thus form a crossply; and placing two sheets of the crossply onto each other; locally performing a heat treatment on the two sheets of the crossply, in such a way that the carrier layers of the respective sheets locally melt together, wherein the melting spots together form a curved sealing line defining an inner space between both sheets.