Abstract:
An air bag substrate fabric utilizing a tying yarn knitting arrangement wherein a portion of the tying yarns are threaded to engage needles so as to form two stitches with one on either side of the inlay warp yarn at rows of stitch formation. The neighboring stitches resist yarn separation and resultant combing while also blocking the commencement and propagation of de-knitting when a tying yarn is broken.
Abstract:
An inflatable automotive protective cushion and method of formation. The protective cushion includes a multilayer film coating with an adhesive layer and an overlying barrier layer. The adhesive layer is adapted to bond to a textile substrate and the barrier layer is adapted to block air permeability.
Abstract:
The present invention relates to an airbag cushion which exhibits a low amount of seam usage (in order to attach at least two fabric panels or portions of a panel together) in correlation to an overall high amount of available inflation airspace within the cushion itself. These correlated elements are now combined for the first time in what is defined as an effective seam usage index (being the quotient of the length of overall seams on the cushions and the available inflation airspace volume). The inventive cushion must have at least one substantially straight seam and must possess an effective seam usage factor of less than about 0.11. A cushion exhibiting such a low seam usage factor and also comprising an integrated looped pocket for the disposition of an inflator can is also provided as well as an overall vehicle restraint system comprising the inventive airbag cushion.
Abstract:
A side curtain air bag treated with a film forming polyurethane coating that reduces the propensity for seam combing while simultaneously blocking permeability outboard of the seams to a sufficient degree to provide gas retention over an extended period of time following pressurization.
Abstract:
An airbag and a method for making an airbag of the type that includes an irregularly-shaped panel, such as the side panels of a passenger airbag. The irregularly-shaped side panel is first divided into two segments with a single straight line to define an inflation segment and an impact segment. The straight line drawn to define the largest polygon that can be defined by any single straight line without coming too close to the inflation module hole. By segmenting the larger, irregularly shaped panel into two smaller ones with one of those being polygonal, better nesting of the segments can be obtained, which significantly improves fabric utilization to offset the labor cost from sewing the two segments together when making the irregularly shaped side panel required for the airbag.
Abstract:
The present invention relates to an airbag cushion which simultaneously exhibits a low amount of seam usage (in order to attach at least two fabric panels or portions of a single panel together) as well as a very low amount of fabric utilized to produce the target airbag cushion, both in correlation to an overall high amount of available inflation airspace within the cushion itself. These two separate, but correlated factors, one based on an effective seam usage index are now combined for the first time in what is defined as an effective seam usage index (being the quotient of the length of overall seams on the cushions and the available inflation airspace volume) and the other based on an effective fabric usage index (being the quotient of the amount of fabric utilized in the construciton of the airbag cushion and the available inflation airspace volume). The inventive airbag cushion must possess an effective seam usage factor of at most 0.11 and an effective fabric usage factor of at most 0.0330. A cushion exhibiting such low seam usage and fabric usage factors and also comprising an integrated looped pocket for the disposition of an inflator can is also provided as well as an overall vehicle restraint system comprising the inventive airbag cushion.
Abstract:
The present invention relates to air bag tethers formed from multiple bias-cut tether segments. Groups of tether segments are attached to the front and rear air bag panels and are then connected to one another to form a functional tether system. This multiple-segment construction, with its bias-cut segments, decreases the amount of fabric that is used in the manufacture of the air bag and tethers, while providing sufficient elongation for the tether system to be functional.
Abstract:
A polygon-shaped air bag for use in vehicle restraint system is constructed from two panels of different sizes, each of which is in the form of an n-sided equiangular polygon, where n may be five or greater but is preferably six or eight. The panels are cut from a blank which is comprised of fabric or other suitable material, then superimposed in concentric relation onto one another with the perimeter portions of the larger panel folded and adhesively secured to the corresponding perimeter portions of the smaller panel for the purpose of distributing the stresses of inflation and impact across an area wider than the conventional equatorial seam and transferring such stresses into shearing, rather than tensile forces. In a preferred embodiment, the width of the overlapping panel portion is equal to the distance between an edge of the smaller panel and a corresponding parallel edge of the larger panel, where the panels are superimposed in concentric relation to one another.
Abstract:
A twelve-sided polygon-shaped air bag comprised of fabric for use in vehicle restraint systems and method of manufacture is disclosed. The air bag is constructed from fabric panels in the shape of congruent, twelve-sided polygons, which may be regular dodecagons or dodecagons having alternating short and long sides. The individual panels may be in the form of a single dodecagon, or in the form of two abutting dodecagons. The use of dodecagon-shaped panels allows for economical fabric utilization and increased fabrication efficiency, compared with panels having a circular shape.
Abstract:
An airbag construction utilizing welds, reinforced with sewn seams, to adhere two fabrics together to form an inflatable airbag cushion. Although welded seams provide better and more easily produced attachment points between multiple layers of fabrics, not to mention improved manners of reducing air or gas permeability at such attachment points, the utilization of sewn seams adjacent to such welded areas provides stronger reinforcement, and thus more reliable nonpermeable fabrics. Seam welding generally concerns the utilization of a film on the underside of a fabric which, upon contact with a second, film-treated fabric and upon exposure to high frequency energy, forms a bead of polymeric material at the attachment point between the two fabric layers. Lower numbers of sewn seams may be utilized to permit sufficient reinforcement if the size of the formed polymeric bead is of sufficient size to permit thorough sealing and adhesion between the fabric layers. Such a specific reinforced fabric, as well as high bead-size welded airbag fabrics are encompassed within this invention.