Warp knit fabric with ravel resistant laid-in elastic yarns and method for manufacturing same
AssigneeLiberty Fabrics
InventorDavid T. Richards
Life of this patent
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Abstract
A warp knit Raschel fabric having unidirectional stretch characteristics and ravel resistant laid-in elastic yarns is produced by laying in two sets of spandex yarns with a set of inelastic knitted yarns. The two sets of spandex yarns cross one another at a multiplicity of contact points. The knitted fabric is subjected to dry heat in a temperature range between 385 and 400 degrees Fahrenheit with causes the two sets of spandex yarns to fuse at the contact points.
Claims32
A method for manufacturing a knitted fabric having ravel resistant laid-in elastic yarns, said method comprising the steps of:
- warp knitting a plurality of inelastic first threads with a first bar of a knitting machine;
- simultaneously with said step of warp knitting, laying in a plurality of elastic second threads with a second bar of said knitting machine so that said second threads are interlooped with said first threads;
- also simultaneously with said step of warp knitting, laying in a plurality of elastic third threads with a third bar of said knitting machine so that said third threads each touch at least one of said second threads at a plurality of contact points, said steps of knitting and laying resulting in a web of knitted material;
- and
- subsequently to said steps of knitting and laying in, heating said web so that said second threads and said third threads are fused at said contact points, thereby producing the knitted fabric having ravel resistant laid-in elastic yarns.
A knitted fabric having ravel resistant laid-in elastic yarns, said fabric comprising:
- a plurality of warp knitted inelastic first threads;
- a plurality of elastic second threads laid in and interlooped with said first threads;
- a plurality of elastic third threads each laid in with said first threads and touching at least one of said second threads at a plurality of contact points, said third threads being fused to said second threads at said contact points.
A knitted fabric having ravel resistant laid-in elastic yarns, said fabric comprising:
- a plurality of inelastic first threads warp knitted by respective guides of a first bar of a knitting machine;
- a plurality of elastic second threads laid in with the knitted first threads by a second bar of said knitting machine, said second threads being interlooped with said first threads;
- a plurality of elastic third threads laid in with the knitted first threads by a third bar of said knitting machine, said third threads each touching at least one of said second threads at a plurality of contact points, said third threads being fused to said second threads at said contact points.
Dependencies are inferred from the claim text.