US5634249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of multifilament yarn drawn in the interlacing stage, from partially oriented thermoplastic yarns
Assignee: Individual
•
Filing: 1994-12-16
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Granted: 1997-06-03
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Expires: 2014-12-16
Abstract
Abstract A process and apparatus for simultaneously drawing and interlacing partially oriented thermoplastic yarns. The process is carried out in a single apparatus by maintaining the yarn under drawing tension and simultaneously contacting the tensioned yarn with a gaseous fluid at an angle, temperature and pressure such that the yarn is simultaneously drawn and interlaced at the point it is being drawn.
Inventors
- 👤 Vito Ballarati
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:10
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
56 words
A process for preparing drawn thermoplastic yarns comprising subjecting a partially oriented multifilament yarn to a tension sufficient to completely orient the yarn, and simultaneously contacting the taut yarn with a gaseous fluid jet at an angle, temperature and pressure such that the yarn is simultaneously drawn and interlaced at the point in is being drawn.
Claim 2
Dependent Claim
56 words
A process for preparing drawn thermoplastic yarns comprising subjecting a partially oriented multifilament yarn to a tension sufficient to completely orient the yarn, and simultaneously contacting the taut yarn with a gaseous fluid jet at an angle, temperature and pressure such that the yarn is simultaneously drawn and interlaced at the point in is being drawn.
Claim 3
Dependent Claim
21 words
A process according to claim 1, wherein the temperature of the gaseous fluid jet is between about 75° and 200° C.
Claim 4
Dependent Claim
21 words
A process according to claim 1, wherein the angle at which the gaseous fluid jet contacts the yarn is about 90°.
Claim 5
Dependent Claim
18 words
A process according to claim 1, wherein the pressure of the gaseous fluid jet is about 4 bar.
Claim 6
Dependent Claim
12 words
A process according to claim 1, wherein the gaseous fluid comprises steam.
Claim 7
Dependent Claim
18 words
A process according to claim 1, wherein the drawn and interlaced yarn is wound on cops or bobbins.
Claim 8
Dependent Claim
52 words
A process for producing drawn thermoplastic yarns comprising subjecting a partially oriented multifilament yarn to a tension sufficient to form a drawing neck, and simultaneously contacting the yarn at the drawing neck with a gaseous fluid jet at an angle, temperature and pressure such that the yarn is simultaneously drawn and interlaced.
Claim 9
Dependent Claim
52 words
A process for producing drawn thermoplastic yarns comprising subjecting a partially oriented multifilament yarn to a tension sufficient to form a drawing neck, and simultaneously contacting the yarn at the drawing neck with a gaseous fluid jet at an angle, temperature and pressure such that the yarn is simultaneously drawn and interlaced.
Claim 10
Dependent Claim
21 words
A process according to claim 7, wherein the temperature of the gaseous fluid jet is between about 75° and 200° C.
Claim 11
Dependent Claim
21 words
A process according to claim 7, wherein the angle at which the gaseous fluid jet contacts the yarn is about 90°.
Claim 12
Dependent Claim
18 words
A process according to claim 7, wherein the pressure of the gaseous fluid jet is about 4 bar.
Claim 13
Independent Claim
77 words
An apparatus for simultaneously drawing and interlacing thermoplastic yarns at the same point, comprising at least one tubular chamber for drawing a partially oriented yarn, and a nozzle for injecting a jet of gaseous fluid into the tubular chamber positioned so that the jet of gaseous fluid is perpendicular to the direction of the yarn, said jet of gaseous fluid being at a temperature and pressure suitable for drawing and interlacing the yarn at the same point.
Claim 14
Independent Claim
77 words
An apparatus for simultaneously drawing and interlacing thermoplastic yarns at the same point, comprising at least one tubular chamber for drawing a partially oriented yarn, and a nozzle for injecting a jet of gaseous fluid into the tubular chamber positioned so that the jet of gaseous fluid is perpendicular to the direction of the yarn, said jet of gaseous fluid being at a temperature and pressure suitable for drawing and interlacing the yarn at the same point.
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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) | 2000-06-02 | 2000-12-02 | 2001-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-02 | 2004-12-02 | 2005-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-02 | 2008-12-02 | 2009-06-03 | $7700.00 | Window Closed / Lapsed |