Elastic tape with ravel resistant edge and method of knitting
AssigneeSouthern Webbing Mills, Inc.
InventorsCothran D. Wall, John L. Overly
Life of this patent
Estimating the term…
Abstract
Multiple wale lapping stitch loop chains are knit of additional yarn and extend over at least a pair of adjacent wales along at least one selvage edge of the elastic tape to prevent ravelling of the edge of the tape. The knitted elastic tape also includes a plurality of stitch loop chains knit of stretchable yarn and forming adjacent wales extending longitudinally of the tape and successive courses extending from one side of the tape to the other. An elastomeric yarn is inlaid in and extends along selected ones of the plurality of stitch loop chains and filling yarn extends back and forth across the tape so that the tape is stretchable in the lengthwise direction but substantially unstretchable in the widthwise direction.
Claims15
A warp knit elastic fabric including at least one edge portion resistant to ravelling and including
- a. a plurality of walewise parallel stitch loop chains knit of stretchable yarn and forming successive courses extending from one side of said fabric to the other,
- b. an elastomeric yarn inlaid in and extending along selected ones of said parallel stitch loop chains,
- c. filling yarn extending back and forth across said fabric and being held in said stitch loop chains, and
- d. at least one multiple wale lapping stitch loop chain knit of stretchable yarn and forming stitch loops knit in plated relationship with the stitch loops of at least a pair of said parallel stitch loop chains extending along one selvage edge of said fabric for preventing ravelling of the corresponding parallel stitch loop chains.
A method of forming a warp knit elastic fabric including at least one edge portion resistant to ravelling and comprising the steps of
- a. knitting a plurality of walewise parallel stitch loop chains of stretchable yarn and forming successive courses extending transversely of the fabric, and while
- b. inlaying an elastomeric yarn in and extending along selected ones of said parallel stitch loop chains,
- c. inlaying filling yarn in a back and forth manner across the width of said fabric and during the formation of said stitch loop chains so that said filling yarn is held in the stitches in successive courses of said stitch loop chains, and
- d. lapping stretchable yarn around at least a pair of adjacent needles on at least one selvage of the fabric to form a multiple wale lapping stitch loop chain in plated relationship with the stitch loops of adjacent pairs of said parallel stitch loop chains extending along said one selvage edge of the fabric to prevent ravelling of the corresponding parallel stitch loop chains.
Dependencies are inferred from the claim text.