Method for the production of an air bag having a three-dimensional form
First Claim
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1. A method for producing for deployment in an air bag module an air bag which in its inflated condition has a three-dimensional form via the fabrication of a two layered material web from which individual air bag cut-outs are continuously cut, the method comprising:
- connecting the material web layers to one another along closed contours such that the edges so formed from the connection of the material web layers to one another exhibit a trapezoidal-like shape in that each individual cut-out has a pair of non-parallel edges and one edge which is parallel to and longer than another respective edge and each individual cut-out has a pair of shortened inwardly directed branches each formed in a respective one of the corner areas oppositely disposed to one another and each defined by the respective intersection of one of the two respective border non-parallel edges with the border edge of the longer parallel trapezoid side and each branch has two respective edges disposed at a selected one of a disposition outside of the stitched together area of the individual cut out and along the stitched together area of the individual cut out; and
cutting along a cutting line each individual air bag cut-out to be cut out of the material web such that the path of the cutting line of the individual air bag cut-out to be cut out does not correspond, in the area of the corners of the longer trapezoid side, to the contour edge but, instead, to contribute to the formation of the height of the three-dimensional air bag, extends inwardly, whereby, in the subsequent completion of the production of a closed air bag from the individual cut-out, the cutting edges of each branch of each material web layer are connected to one another.
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Abstract
A method for producing for deployment in an air bag module an air bag which in its inflated condition has a three-dimensional form via the fabrication of a two layered material web from which individual air bag cut-outs are continuously cut includes connecting the material web layers to one another along closed contours such that the edges so formed from the connection of the material web layers to one another exhibit a trapezoidal-like shape. The method also includes cutting along a cutting line such that the path of the cutting line of the individual air bag cut-out to be cut out does not correspond, in the area of the corners of the longer trapezoid side, to the contour edge but, instead, to contribute to the formation of the height of the three-dimensional air bag,extends inwardly.
15 Citations
13 Claims
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1. A method for producing for deployment in an air bag module an air bag which in its inflated condition has a three-dimensional form via the fabrication of a two layered material web from which individual air bag cut-outs are continuously cut, the method comprising:
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connecting the material web layers to one another along closed contours such that the edges so formed from the connection of the material web layers to one another exhibit a trapezoidal-like shape in that each individual cut-out has a pair of non-parallel edges and one edge which is parallel to and longer than another respective edge and each individual cut-out has a pair of shortened inwardly directed branches each formed in a respective one of the corner areas oppositely disposed to one another and each defined by the respective intersection of one of the two respective border non-parallel edges with the border edge of the longer parallel trapezoid side and each branch has two respective edges disposed at a selected one of a disposition outside of the stitched together area of the individual cut out and along the stitched together area of the individual cut out; and
cutting along a cutting line each individual air bag cut-out to be cut out of the material web such that the path of the cutting line of the individual air bag cut-out to be cut out does not correspond, in the area of the corners of the longer trapezoid side, to the contour edge but, instead, to contribute to the formation of the height of the three-dimensional air bag, extends inwardly, whereby, in the subsequent completion of the production of a closed air bag from the individual cut-out, the cutting edges of each branch of each material web layer are connected to one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification
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Current AssigneeAutoliv AB (Autoliv Incorporated)
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Original AssigneeAutoliv AB (Autoliv Incorporated)
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InventorsFrei, German
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Primary Examiner(s)LORENGO, JERRY A
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Application NumberUS09/936,797Time in Patent Office748 DaysField of Search156/250, 156/256, 156/258, 156/266, 156/269, 156/304.1, 156/304.2, 156/217, 280/728.1, 280/743.1, 383/3, 493/186, 493/227, 493/231, 493/243, 493/244, 493/940US Class Current156/250CPC Class CodesB60R 2021/23547 one piece weavingB60R 21/231 characterised by their shap...B60R 21/235 characterised by their mate...Y10T 156/1036 Bending of one piece blank ...Y10T 156/1052 with cutting, punching, tea...Y10T 156/1062 Prior to assemblyY10T 156/1066 Cutting to shape joining ed...Y10T 156/1084 of continuous or running le...
