Patent US4989529A successfully refreshed from Google Patents.
US4989529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of a multiple biased fabric by folding
Assignee: Saint Gobain Technical Fabrics Canada Ltd
•
Filing: 1989-07-10
•
Granted: 1991-02-05
•
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 01:17
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.
References Cited (Backward Citations)
US3013513A
Cited
US3459615A
Cited
DE1435115A1
Cited
US3819469A
Cited
US4081305A
Cited
US4567738A
Cited
US4567738B1
Cited
US4484459A
Cited
US4484459B1
Cited
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 |