EP0211564A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Sheet material used to form portions of fasteners
Assignee: 3M Co
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Filing: 1986-07-23
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Granted: —
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Expires: 2006-07-23
Abstract
Abstract A method for forming a sheet material adapted to be cut into smaller pieces to form portions of a fastener. The method comprises providing a backing laminate (10) comprising a layer of base material (12, 14) and a sealing layer (16) of heat softenable polymeric material along a back surface (17) of the base material (12, 14); stitching a plurality of yarns (18) through the base material (12, 14) to form loops (20) projecting from a front face (13) of the base material (12, 14) and locking portions (21) of the stitch adjacent the back face (17) of the base material (12, 14); and heating the layer (16) of polymeric material to adhere it to the locking portions (21) of the stitches. The sheet material can then be used if loops (20) are desired, or the loops (20) can be cut to form hooks (72) or heated to form headed projections (65) on the sheet material.
Inventors
- 👤 Miroslav C/O Minnesota Mining And Tochacek
- 👤 Paul E. C/O Minnesota Mining And Hansen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 16:45
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; A; A44; A44B; A44B18/00; A44B18/0003; A61; A61F; A61F13/00; A61F13/15; A61F13/56; A61F13/62; A61F13/622; A61F13/627; D; D04; D04B; D04B21/00; D04B21/02; D04B21/04; D04B21/14; D04B21/16; D04B21/165; D04B23/00; D04B23/10; D10; D10B; D10B2501/00; D10B2501/06; D10B2501/063; D10B2501/0632; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23957; Y10T428/23964; Y10T428/23971; Y10T428/23979; Y10T428/24; Y10T428/24008; Y10T428/24017; Y10T428/24033; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/666; Y10T442/667; Y10T442/69
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
140 words
A method for forming a sheet material adapted to be cut into smaller ravel resistant pieces to form portions of a fastener, said method comprising the steps of: providing a backing laminate (10) comprising a layer of base material (12) having a front face (13) and a back face (17) and a sealing layer (16) of heat softenable polymeric material along the back face (17) of the base material (12, 14); stitching a plurality of yarns (18) through at least the base material (12) of the backing laminate (10) to form loops (20) projecting from the front face (13) of the base material (12, 14) and locking portions (21) of the stitches adjacent to the back face (17) of the base material (12, 14); heating the sealing layer (16) to adhere it to the locking portions (21) of the stitches.
Claim 2
Independent Claim
140 words
A method for forming a sheet material adapted to be cut into smaller ravel resistant pieces to form portions of a fastener, said method comprising the steps of: providing a backing laminate (10) comprising a layer of base material (12) having a front face (13) and a back face (17) and a sealing layer (16) of heat softenable polymeric material along the back face (17) of the base material (12, 14); stitching a plurality of yarns (18) through at least the base material (12) of the backing laminate (10) to form loops (20) projecting from the front face (13) of the base material (12, 14) and locking portions (21) of the stitches adjacent to the back face (17) of the base material (12, 14); heating the sealing layer (16) to adhere it to the locking portions (21) of the stitches.
Claim 3
Dependent Claim
45 words
A method according to claim 1 wherein said yarns (18) are of a heat softenable polymeric material and said heating step includes heating the locking portions (21) of the stitches to fuse them together and to the softened polymeric material from the sealing layer (16).
Claim 4
Dependent Claim
27 words
A method according to claim 1 wherein said stitching and heating steps are performed continuously during movement of the backing laminate (10) along the same production line.
Claim 5
Dependent Claim
67 words
A method according to claim 1 wherein said stitching forms parallel rows of stitch locking portions (21) and along each of the rows the alternating sequence of only a chain locking stitch gathering the backing laminate (10) together within the locking stitch, and a stitch forming a loop (20) extending from the row of stitch locking portions (21) to an adjacent row of stitch locking portions (21).
Claim 6
Dependent Claim
38 words
A method according to claim 1 wherein said method further includes the step of heating the upper portions of the loops (20) to form from each loop (20) two projections (65) with enlarged heads on their distal ends.
Claim 7
Dependent Claim
33 words
A method according to claim 1 further including the steps of heating the loops to cause them to resiliently retain their shapes, and cutting the loops along one side to form hooks (72).
Claim 8
Dependent Claim
24 words
A method according to claim 1 wherein the yarns (18) are stitched through both the base material (12, 14) and the polymeric material (16).
Claim 9
Dependent Claim
52 words
A method according to claim 1 wherein the yarns are stitched only through the base material (12, 14) and the sealing layer (16) is positioned along the back face (17) of the base material (12, 14) over the locking portions (21) of the stitches between the stitching step and the heating step.
Claim 10
Dependent Claim
21 words
A method according to claim 1 wherein the heating step adheres the polymeric material (16) to the base material (12, 14).
Claim 11
Dependent Claim
28 words
A sheet material adapted to be cut into smaller ravel resistant pieces to form portions of fasteners, which sheet material is made by the method of claim 1.
Claim 12
Dependent Claim
135 words
A sheet material adapted to be cut into smaller ravel resistant pieces to form portions of a fastener, said sheet material comprising: a backing laminate (10) comprising a layer of base material (12, 14) having a front face (13) and a back face (17); a plurality of heat softenable polymeric yarns (18) stitched through the backing laminate and having portions projecting from the front face of said layer of base material (12, 14) and locking portions (21) of the stitch adjacent the back face (17) of the base material (12, 14); and a layer (16) of polymeric material adhered to the layer of base material (12, 14) and fused to the locking portions (21) of the stitches, said layer (16) of polymeric material being heat softenable to afford attaching the sheet material to a substrate.
Claim 13
Dependent Claim
135 words
A sheet material adapted to be cut into smaller ravel resistant pieces to form portions of a fastener, said sheet material comprising: a backing laminate (10) comprising a layer of base material (12, 14) having a front face (13) and a back face (17); a plurality of heat softenable polymeric yarns (18) stitched through the backing laminate and having portions projecting from the front face of said layer of base material (12, 14) and locking portions (21) of the stitch adjacent the back face (17) of the base material (12, 14); and a layer (16) of polymeric material adhered to the layer of base material (12, 14) and fused to the locking portions (21) of the stitches, said layer (16) of polymeric material being heat softenable to afford attaching the sheet material to a substrate.
Claim 14
Dependent Claim
56 words
A sheet material (36b) according to claim 11 having parallel rows of stitch locking portions (21) with each of said rows having the alternating sequence of only a chain locking stitch gathering the backing laminate (10) together within the locking stitch, and a stitch forming a loop (20) extending from the row to an adjacent row.
Claim 15
Dependent Claim
21 words
A sheet material (66a, 66b) according to claim 11 wherein said projecting portions (65) have enlarged heads at their distal ends.
Claim 16
Dependent Claim
16 words
A sheet material (36a, 36b) according to claim 11 wherein said projecting portions form loops (20).
Claim 17
Dependent Claim
17 words
A sheet material (70b) according to claim 11 wherein said projecting portions are resiliently flexible hooks (72).
References Cited (Backward Citations)
No citation records indexed.
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