Abstract The tape comprises a body having a fabric structure of single thickness and a list having a fabric structure of double thickness with intermediate links. A spirally arranged list thread is trapped in the list with the leading edges of its spiral turns protruding laterally out of the list. The tape body results from conventional interweaving of a weft thread, forming double picks, with usual warp threads; the list includes a lower strata, disposed on one side of the list thread spiral and formed by the interweaving of a first series of weft double picks with a first series of warp threads, and an upper strata disposed on the other side of the spiral and formed by the interweaving of a second series of weft double picks with a series of auxiliary warp threads and a second series of warp threads. The intermediate links (portions of threads bridging the strata) are constituted by the traversing portions of the weft double picks of the second series and by the traversing portions of the warp threads, which traversing portions are disposed between the turns of the spiral and are received in the trailing loops of these turns. When the list thread is made of a filiform element provided with a deformable hardening material, a deformation of its crosssection at the apex of each protruding loops provides the latter with the required shape to constitute the hooking elements of each half of a sliding clasp fastener.
A tape comprising a tape body and a list connected with said tape body, and a flattened spiral list thread received in said list and having turns forming loops projecting from an outer edge of the list, said turns having upper and lower shanks, said tape body having a fabric structure of single thickness formed by interwoven double-pick weft threads and warp threads, said list having a fabric structure of double thickness comprising: a lower strata of warp threads interwoven with said doublepick weft threads and extending below an outer portion of the lower shank of said turns; an upper strata of warp threads extending above an outer portion of the upper shanks of said turns over the width of the list; portions of said double-pick weft threads extending from said lower strata between said turns at said outer edge up to said upper strata of warp threads, thence over the warp threads of said upper strata and back to the lower strata at an inner edge of said list; and portions of the warp threads of said lower strata rising between each lower shank of one turn and the upper shank of a consecutive turn over the portions of said double-pick weft threads overlying said upper strata and back between said shanks to the plane of the lower strata.
Claim 2
Dependent Claim
220 words
A tape comprising a tape body and a list connected with said tape body, and a flattened spiral list thread received in said list and having turns forming loops projecting from an outer edge of the list, said turns having upper and lower shanks, said tape body having a fabric structure of single thickness formed by interwoven double-pick weft threads and warp threads, said list having a fabric structure of double thickness comprising: a lower strata of warp threads interwoven with said doublepick weft threads and extending below an outer portion of the lower shank of said turns; an upper strata of warp threads extending above an outer portion of the upper shanks of said turns over the width of the list; portions of said double-pick weft threads extending from said lower strata between said turns at said outer edge up to said upper strata of warp threads, thence over the warp threads of said upper strata and back to the lower strata at an inner edge of said list; and portions of the warp threads of said lower strata rising between each lower shank of one turn and the upper shank of a consecutive turn over the portions of said double-pick weft threads overlying said upper strata and back between said shanks to the plane of the lower strata.
Claim 3
Dependent Claim
73 words
A tape according to claim 1, for forming one half of a sliding clasp fastener, wherein said spiral is constituted by a list thread which includes a deformable material at least at those locations where it forms said protruding loops, and wherein the cross-section of the list thread is deformed at the apex of each of the protruding loops to provide the latter with the required shape to form the fastener hooking elements.