Patent US4557806A successfully refreshed from Google Patents.
Patent EP0325473A1 successfully refreshed from Google Patents.
EP0325473A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Sheet material used to form portions of fasteners
Assignee: 3M Co
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Filing: 1989-01-20
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Granted: —
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Expires: 2009-01-20
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 self supporting polymeric film (11) that provides the structural strength to retain the integrity of the sheet material, and stitching a plurality of yarns (18) through the film (11) to form loops (20) projecting from one surface of the film (11) and locking portions (21) of the stitches adjacent the opposite surface of the film. The sheet material (11) can also include a layer (16) of heat softenable polymeric material adhered to the film (11) and the locking portions (21).
Inventors
- 👤 Dennis L. C/O Minnesota Mining And Becker
- 👤 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
2026-11-06 10:22
CPC Classifications
A; A44; A44B; A44B18/00; D; D04; D04B; D04B23/00; D04B23/10; A44B18/0003; A61; A61F; A61F13/00; A61F13/15; A61F13/56; A61F13/62; A61F13/622; B; B32; B32B; B32B5/00; B32B5/02; B41; B41J; B41J3/00; B41J3/38; D04B21/00; D04B21/02; D04B21/04; D04B21/14; D04B21/16; D04B21/165; D10; D10B; D10B2403/00; D10B2403/01; D10B2403/011; D10B2403/0112; D10B2501/00; D10B2501/06; D10B2501/063; D10B2501/0632; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23957; Y10T428/23964; Y10T428/23979; Y10T428/24; Y10T428/24008; Y10T428/24017; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/666; Y10T442/667; Y10T442/69
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
82 words
A method for forming a sheet material adapted to be cut into smaller pieces to form portions of a fastener, said method comprising the steps of: providing a self supporting polymeric film (11) having first and second major surfaces (12, 13); and stitching a plurality of yarns (18) through the film (11) to form loops (20) projecting from the first surface (12) of the film (11) and form locking portions (21) of the stitches adjacent the second surface (13) of the film.
Claim 2
Independent Claim
82 words
A method for forming a sheet material adapted to be cut into smaller pieces to form portions of a fastener, said method comprising the steps of: providing a self supporting polymeric film (11) having first and second major surfaces (12, 13); and stitching a plurality of yarns (18) through the film (11) to form loops (20) projecting from the first surface (12) of the film (11) and form locking portions (21) of the stitches adjacent the second surface (13) of the film.
Claim 3
Dependent Claim
80 words
A method according to claim 1 wherein said method further includes the steps of: positioning a film (16) of heat softenable polymeric material along the second surface (13) of the self supporting polymeric film (11) and the locking portions (21) of the stitches after said stitching step; and heating the film (16) of heat softenable polymeric material to adhere it to the second surface (13) of the self supporting polymeric film (11) and the locking portions (21) of the stitches.
Claim 4
Dependent Claim
41 words
A method according to claim 2 wherein the 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 heat softenable polymeric material.
Claim 5
Dependent Claim
27 words
A method according to claim 2 wherein said stitching, positioning and heating steps are performed continuously during movement of the film (11) along the same production line.
Claim 6
Dependent Claim
74 words
A method according to claim 1 wherein said method further includes the steps of: extruding a layer (16) of heat softenable polymeric material along the second surface (13) of the self supporting polymeric film (11) and the locking portions (21) of the stitches after said stitching step to adhere the heat softenable polymeric material to the second surface (13) of the self supporting polymeric film (11) and the locking portions (21) of the stitches.
Claim 7
Dependent Claim
40 words
A method according to claim 5 wherein the yarns (18) are of a heat softenable polymeric material and said extruding step heats the locking portions (21) of the stitches to fuse them together and to the heat softenable polymeric material.
Claim 8
Dependent Claim
33 words
A method according to claim 1 wherein said method further includes the step of printing graphics on one of the surfaces (12 or 13) of the film (11) prior to said stitching step.
Claim 9
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 10
Dependent Claim
35 words
A method according to claim 1 further including the steps of heating the loops (20) to cause them to resiliently retain their shapes, and cutting the loops (20) along one side to form hooks (72).
Claim 11
Dependent Claim
64 words
A method according to claim 1 wherein: said method further includes the step of adhering a layer (16) of heat softenable polymeric material along the second (13) surface of the self supporting polymeric film (11) prior to said stitching step; and in said stitching step the yarns (18) are stitched through both the film (11) and the layer (16) of heat softenable polymeric material.
Claim 12
Dependent Claim
56 words
A method according to claim 10 wherein: the yarns (18) are of a heat softenable polymeric material; and said method further includes the step of heating the locking portions (21) of the stitches and the heat softenable polymeric material to fuse the locking portions (21) of the stitches together and to the heat softenable polymeric material.
Claim 13
Dependent Claim
26 words
A method according to claim 9 wherein said stitching and heating steps are performed continuously during movement of the film (11) along the same production line.
Claim 14
Dependent Claim
92 words
A method according to claim 1 wherein: said method further includes the step of positioning a film (16) of heat softenable polymeric material along the second surface (13) of the self supporting polymeric film (11) prior to said stitching step; in said stitching step the yarns (18) are stitched through both of the films (11, 16); and said method further includes the step of heating the film (16) of heat softenable polymeric material to adhere the film (16) of heat softenable polymeric material to the second surface (13) of the film (11).
Claim 15
Dependent Claim
55 words
A method according to claim 13 wherein: the yarns (18) are of a heat softenable polymeric material; and said step of heating the film (16) of heat softenable polymeric material heats the locking portions (21) of the stitches to fuse the locking portions (21) of the stitches together and to the heat softenable polymeric material.
Claim 16
Dependent Claim
26 words
A method according to claim 13 wherein said stitching and heating steps are performed continuously during movement of the film (11) along the same production line.
Claim 17
Dependent Claim
32 words
A method according to claim 1 wherein the film comprises two layers including a layer of heat softenable polymeric material defining the second surface (13) of the self supporting polymeric film (11).
Claim 18
Dependent Claim
56 words
A method according to claim 16 wherein: the yarns (18) are of a heat softenable polymeric material; and said method further includes the step of heating the locking portions (21) of the stitches and the heat softenable polymeric material to fuse the locking portions (21) of the stitches together and to the heat softenable polymeric material.
Claim 19
Dependent Claim
25 words
A method according to claim 17 wherein said stitching and heating steps are performed continuously during movement of the film along the same production line.
Claim 20
Dependent Claim
26 words
A sheet material adapted to be cut into smaller pieces to form portions of fasteners, which sheet material is made by the method of claim 1.
Claim 21
Dependent Claim
100 words
A sheet material adapted to be cut into smaller pieces to form portions of a fastener, said sheet material comprising: a backing (10) having a front face and a back face, and comprising a self supporting polymeric film (11) and a plurality of yarns (18) stitched through said film (11) having projected portions (20, 72, 65) projecting from the front face of said backing (10), and having locking portions (21) on the side (13) of said film (11) opposite said projecting portions (20, 72, 65); said film (11) providing the structural strength to retain the integrity of the sheet material.
Claim 22
Dependent Claim
100 words
A sheet material adapted to be cut into smaller pieces to form portions of a fastener, said sheet material comprising: a backing (10) having a front face and a back face, and comprising a self supporting polymeric film (11) and a plurality of yarns (18) stitched through said film (11) having projected portions (20, 72, 65) projecting from the front face of said backing (10), and having locking portions (21) on the side (13) of said film (11) opposite said projecting portions (20, 72, 65); said film (11) providing the structural strength to retain the integrity of the sheet material.
Claim 23
Dependent Claim
62 words
A sheet material according to claim 20 wherein said locking portions (21) are in contact with the side (13) of said film (11) opposite said projecting portions (20, 72, 65), and said backing (10) includes a layer (16) of heat softenable polymeric material defining the back face of the backing (10) and adhering to said film (11) over said locking portions (21).
Claim 24
Dependent Claim
38 words
A sheet material according to claim 21 wherein said yarns (18) are of heat softenable polymeric material, and said locking portions (21) of said stitches are fused together and to the layer (16) of heat softenable polymeric material.
Claim 25
Dependent Claim
56 words
A sheet material according to claim 20 wherein said backing includes a layer (16) of heat softenable polymeric material defining the back face of the backing (10) and adhered to said film (11), said yarns are stitched through both said film (11) and said layer (16), and said locking portion (21) are along said back face.
Claim 26
Dependent Claim
38 words
A sheet material according to claim 23 wherein said yarns (18) are of heat softenable polymeric material, and said locking portions (21) of said stitches are fused together and to said layer (16) of heat softenable polymeric material.
Claim 27
Dependent Claim
40 words
A sheet material according to claim 20 wherein said film (11) comprises two layers including a layer (16) of heat softenable polymeric material defining the back face of the backing, and said locking portions (21) are along said back face.
Claim 28
Dependent Claim
38 words
A sheet material according to claim 23 wherein said yarns (18) are of heat softenable polymeric material, and said locking portions (21) of said stitches are fused together and to said layer (16) of heat softenable polymeric material.
Claim 29
Dependent Claim
24 words
A sheet material according to claim 20 wherein the polymeric material of said film (11) has a low elongation ratio and high tear resistance.
Claim 30
Dependent Claim
26 words
A sheet material according to claim 20 wherein said film (11) is of high molecular weight high density polyethylene and is at least 0.0015 inch thick.
Claim 31
Dependent Claim
25 words
A sheet material according to claim 20 wherein said film (11) has opposite major surface (12, 13) and has printing along one of said surfaces.
Claim 32
Dependent Claim
18 words
A sheet material according to claim 20 wherein said projecting portions of said yarns (18) form loops (20).
Claim 33
Dependent Claim
22 words
A sheet material according to claim 20 wherein some of said projecting portions of said yarns (18) are resiliently flexible hooks (72).
Claim 34
Dependent Claim
23 words
A sheet material according to claim 20 wherein said projecting portions (65) of said yarns (18) have enlarged heads at their distal ends.
References Cited (Backward Citations)
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