US6182709B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uncoated woven fabric for air bags, and its production process and system
Assignee: Toyobo Co Ltd
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Filing: 1999-07-22
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Granted: 2001-02-06
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Expires: 2019-07-22
Abstract
Abstract An uncoated woven fabric for air bags of motor vehicles which is produced by weaving a fabric; subjecting the woven fabric to a shrinkage step in boiling water; and then subjecting the woven fabric thus treated to a step for drying and finishing.
Inventors
- 👤 Tatsuo Konishi
- 👤 Mamoru Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:15
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/23; B60R21/235; D; D03; D03D; D03D1/00; D03D1/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
108 words
(Amended) An uncoated woven fabric for air bags which has the following properties: (a) ST5% (warp direction)+ST5% (weft direction)≦1.2 g/d (b) AP≦0.5 cc/cm 2 /sec. (c) W≦205 g/m 2 (d) S (warp direction)+S (weft direction)≦220 mm (e) T≦0.30mm wherein ST5% represents a value obtained by dividing tensile strength at 5% elongation of the fabric by total yarn denier of the fabric toward the elongation direction (g/d); AP represents the degree of air-permeability (frazir method, 125 Pa pressure difference) (cc/cm 2 /sec.); W represents weight of the fabric (g/m 2 ); S represents the degree of stiffness (cantilever method) (mm); and T represents a thickness of the fabric (mm).
Claim 2
Dependent Claim
108 words
(Amended) An uncoated woven fabric for air bags which has the following properties: (a) ST5% (warp direction)+ST5% (weft direction)≦1.2 g/d (b) AP≦0.5 cc/cm 2 /sec. (c) W≦205 g/m 2 (d) S (warp direction)+S (weft direction)≦220 mm (e) T≦0.30mm wherein ST5% represents a value obtained by dividing tensile strength at 5% elongation of the fabric by total yarn denier of the fabric toward the elongation direction (g/d); AP represents the degree of air-permeability (frazir method, 125 Pa pressure difference) (cc/cm 2 /sec.); W represents weight of the fabric (g/m 2 ); S represents the degree of stiffness (cantilever method) (mm); and T represents a thickness of the fabric (mm).
Claim 3
Dependent Claim
65 words
A process for producing an uncoated woven fabric for an air bag which comprises the steps of: (a) weaving a fabric; (b) subjecting the woven fabric to a shrinkage step in boiling water; and then (c) subjecting the woven fabric thus treated to a step for drying with a suction drum dryer and finishing, wherein the step (c) is carried out by a multi-stage step.
Claim 4
Dependent Claim
65 words
A process for producing an uncoated woven fabric for an air bag which comprises the steps of: (a) weaving a fabric; (b) subjecting the woven fabric to a shrinkage step in boiling water; and then (c) subjecting the woven fabric thus treated to a step for drying with a suction drum dryer and finishing, wherein the step (c) is carried out by a multi-stage step.
Claim 5
Dependent Claim
88 words
A process for producing an uncoated woven fabric for an air bag which comprises the steps of: (a) weaving a fabric; (b) subjecting the woven fabric to a shrinkage step in boiling water; and then (c) subjecting the woven fabric thus treated to a step for drying with a suction drum dryer and finishing, wherein the step (c) is carried out by a two-stage step, temperature of the first stage (T1) being 70 to 170° C. and temperature of the second stage (T2) being 90 to 190° C.
Claim 6
Dependent Claim
88 words
A process for producing an uncoated woven fabric for an air bag which comprises the steps of: (a) weaving a fabric; (b) subjecting the woven fabric to a shrinkage step in boiling water; and then (c) subjecting the woven fabric thus treated to a step for drying with a suction drum dryer and finishing, wherein the step (c) is carried out by a two-stage step, temperature of the first stage (T1) being 70 to 170° C. and temperature of the second stage (T2) being 90 to 190° C.
Claim 7
Dependent Claim
12 words
The process according to claim 3 , therein T2 higher than T1.
Claim 8
Dependent Claim
24 words
The process according to claim 4 , wherein warp tension is controlled between the first stage and the second stage of the step (c).
Claim 9
Dependent Claim
16 words
The process according to claim 5 , wherein warp tension is controlled during the step (b).
Claim 10
Dependent Claim
19 words
The process according to claim 6 , wherein the step (a) is carried out by a water jet loom.
Claim 11
Dependent Claim
25 words
The process according to claim 6 , wherein the fabric woven by a water jet loom is subjected to the step (b) immediately without drying.
Claim 12
Dependent Claim
25 words
The process according to claim 6 , wherein dry heat shrinkage of the raw yarn used is 5 to 12% (treatment at 180° C.×15 min.).
Claim 13
Dependent Claim
20 words
An uncoated woven fabric for air bags obtained by the process of any one of claims 4 to 9 .
Claim 14
Independent Claim
47 words
A system of producing an uncoated woven fabric for air bags which comprises: (a) a weaving mechanism; (b) a woven fabric shrinking mechanism in boiling water; and (c) a drying and finishing mechanism, wherein the mechanism (c) includes a suction drum dryer and is a multi-stage mechanism.
Claim 15
Independent Claim
47 words
A system of producing an uncoated woven fabric for air bags which comprises: (a) a weaving mechanism; (b) a woven fabric shrinking mechanism in boiling water; and (c) a drying and finishing mechanism, wherein the mechanism (c) includes a suction drum dryer and is a multi-stage mechanism.
Claim 16
Independent Claim
47 words
A system of producing an uncoated woven fabric for air bags which comprises: (a) a weaving mechanism; (b) a woven fabric shrinking mechanism in boiling water; and (c) a drying and finishing mechanism, wherein the mechanism (c) includes a suction drum dryer and is a two-stage mechanism.
Claim 17
Independent Claim
47 words
A system of producing an uncoated woven fabric for air bags which comprises: (a) a weaving mechanism; (b) a woven fabric shrinking mechanism in boiling water; and (c) a drying and finishing mechanism, wherein the mechanism (c) includes a suction drum dryer and is a two-stage mechanism.
Claim 18
Dependent Claim
30 words
The system according to claim 12 , wherein the mechanism (c) includes two units and a warp tension controlling apparatus is included between the first unit and the second unit.
Claim 19
Dependent Claim
17 words
The system according to claim 13 , wherein the mechanism (b) includes a warp tension controlling apparatus.
Claim 20
Dependent Claim
16 words
The system according to claim 14 , herein the mechanism (a) includes a water jet loom.
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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) | 2004-02-06 | 2004-08-07 | 2005-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-02-06 | 2008-08-07 | 2009-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-02-06 | 2012-08-07 | 2013-02-06 | $7700.00 | Window Closed / Lapsed |