US4989529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of a multiple biased fabric by folding
Assignee: Saint Gobain Technical Fabrics Canada Ltd
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Filing: 1989-07-10
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Granted: 1991-02-05
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Expires: 2009-07-10
Abstract
Abstract A multiple biased structural fabric and a method for making the same, are disclosed. In a preferred embodiment, double biased structural farbic is produced using the novel method. Single biased fabric made up of structural yarns held together by secondary yarns is fed through a folding machine. The single biased fabric folded onto itself in the folding machine presents two layers of single biased fabric in the form of a double biased fabric. This fabric is then fed to a stitching machine. The stitching machine knits or sews the two layers of fabric together to produce the double biased fabric of the instant invention.
Inventors
- 👤 Roy Shoesmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:05
CPC Classifications
B; B65; B65H; B65H45/00; B65H45/02; B65H45/06; B65H45/08; B65H45/09; D; D04; D04D; D04D9/00; D04D9/02; D04H; D04H3/00; D04H3/02; D04H3/05
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
140 words
A method of making a multi-layer non-woven structural fabric comprising the steps of: directing a layer of single biased structural fabric having at least two edges longitudinally from a feed end to an exit end, wherein said layer of fabric is comprised of a plurality of structural fibers oriented substantially parallel to each other and biased to said edges; leading said layer to a first affixing stage comprised of means for affixing said structural fibers in alignment; leading said layer from said first affixing stage into at least one folding stage wherein said layer is folded longitudinally from one said edge toward another to form a multiple biased fabric; leading said multiple biased fabric from said folding stage into a second affixing stage wherein said multiple biased fabric is affixed together to provide a single structural fabric being multiple biased.
Claim 2
Independent Claim
140 words
A method of making a multi-layer non-woven structural fabric comprising the steps of: directing a layer of single biased structural fabric having at least two edges longitudinally from a feed end to an exit end, wherein said layer of fabric is comprised of a plurality of structural fibers oriented substantially parallel to each other and biased to said edges; leading said layer to a first affixing stage comprised of means for affixing said structural fibers in alignment; leading said layer from said first affixing stage into at least one folding stage wherein said layer is folded longitudinally from one said edge toward another to form a multiple biased fabric; leading said multiple biased fabric from said folding stage into a second affixing stage wherein said multiple biased fabric is affixed together to provide a single structural fabric being multiple biased.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said multiple biased fabric is double biased.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein said folding stage and said affixing stages are oriented in series in the direction of travel of said fabric.
Claim 5
Dependent Claim
26 words
The method of claim 1 wherein said first affixing stage and said second stage are oriented in parallel in the direction of travel of said fabric.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein said first affixing means is comprised of secondary yarns.
Claim 7
Dependent Claim
12 words
The method of claim 5 wherein said secondary yarns are non-structural yarns.
Claim 8
Dependent Claim
23 words
The method of claim 1 wherein said structural fibers of said single biased fabric are oriented at 45 degrees from each said edge.
Claim 9
Dependent Claim
19 words
The method of claim 2 wherein the structural fibers of said double biased fabric are perpendicular to one another.
Claim 10
Dependent Claim
14 words
The method of claim 1 wherein a multiple of said folding stages are provided.
Claim 11
Dependent Claim
20 words
The method of claim 1 comprising the additional step of adding parallel yarns arranged longitudinally in said layer of fabric.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |