Bag, airbag, and method of making the same

A bag suitable for use in an airbag, comprising:

• a seamless bag of integral, unitary, one-piece woven construction, devoid of any sewing or stitching and having a Frazier porosity of less than 8 cubic feet per minute, said bag defining:
• (i) a pair of opposed panels of substantial area formed in a plain weave of a first weave of about 45.times.45, each of said opposed panels being of substantially rectangular configuration,
• (ii) a single intermediate margin having a total of about 4 picks and 4 ends and a width of about 2.0 mm. joining the peripheries of said opposed panels together, said intermediate margin being formed in a plain interweave of about 90.times.90, and
• (iii) a single outer margin having a width of about 6.0 mm extending about the periphery of said intermediate margin, said outer margin being formed in a non-plain single/triple weave of about 90.times.90 looser than said plain interweave.

An airbag comprising:

• (A) an inverted seamless bag of integral, unitary, one-piece woven construction having a Frazier porosity of less than 8 cubic feet per minute, said bag prior to inversion defining:
• (i) a pair of opposed panels of substantial area formed in a plain weave of a first count,
• (ii) a single intermediate margin of slight width joining the peripheries of said opposed panels together, said intermediate margin being formed in a plain interweave of a second count greater than said first count;
• and
• (iii) a single outer margin of substantially greater width than said intermediate margin extending about the periphery of said intermediate margin, said outer margin being formed in a weave looser than said plain interweave;
• and
• (B) inflation means in gaseous communication with the interior of said inverted bag for inflating said inverted bag.

A method of making a bag for an airbag, comprising the steps of:

• (A) weaving a seamless bag of integral, unitary, onepiece woven construction having a Frazier porosity of less than 8 cubic feet per minute, said bag defining:
• (i) a pair of opposed panels of substantial area formed in a plain weave of a first yarn density;
• and
• (ii) a single intermediate margin of slight width joining of the periphery of said opposed panels together, said intermediate margin being formed in a plain weave of a second yarn density greater than said first yarn density;
• and
• (iii) a single outer margin of substantially greater width than said intermediate margin extending about the periphery of said intermediate margin, said outer margin being formed in a weave looser than said plain weave.