Warp-knitted tape for slide fastener

Claim 1

In a slide fastener having a warp-knitted tape, a row of fastener elements stitched to said tape along a marginal edge portion thereof, and a slider moveable along said fastener elements in sliding contact with a predetermined width portion of the tape, the improvement which comprises the tape having a web portion and a marginal edge portion extending longitudinally of the tape, said web portion including chain stitches that form wales, tricot stitches interknitted therewith and extending across at least two adjacent wales, and transverse lapping threads each laid over and across a plurality of wales and arranged to wrap around a location where said chain stitches and said tricot stitches are interknitted in each course, and said marginal edge portion including chain stitches that form a first wale and a group of adjacent wales, including a second wale and transverse lapping threads each laid over and across said first wale and adjacent wales, said first wale and second wale being in direct adjacency and spaced apart without any tricot stitch spanning therebetween to provide an interwale groove greater in width than each of the other wales in the web portion whereby said group of adjacent wales are held together to provide therebetween interwale grooves narrower than the remaining grooves in the web portion, said group of adjacent wales being disposed for sliding contact with the slider and defining said predetermined width portion of the tape, said fastener elements being stitched to the tape by stitches received in said greater width wale groove between said first and second wales.