US5227110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing highly oriented amorphous polyester filament yarns
Assignee: Viscosuisse SA
•
Filing: 1989-02-20
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Granted: 1993-07-13
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Expires: 2009-02-20
Abstract
Abstract In a process for manufacturing fast-spin highly oriented amorphous polyester filament yarns, the shock cooling is achieved by means of a rotating cooling surface formed by the contact surface of a cooling cylinder. Filament yarns having a desired boiling shrinkage up to 70% and a birefringence larger than 0.08 can be obtained by varying the duration of contact between the filament yarns and the cooling cylinder and/or the distance between the spinneret and the cooling cylinder.
Inventors
- 👤 Klaus Fischer
- 👤 Halim Baris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:29
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
The method of producing a highly oriented amorphous polyester filament feeder yarn for false twist texturing having a boiling shrinkage of 40 to 70%, which comprises melt-spinning a polyester in a spinneret into yarn filaments, shock-cooling the melt-spun yarn filaments by bringing them in contact with a cooled rotating surface at a distance of 35 to 60 cm from the spinneret for 1×10 -3 to 1×10 -2 seconds, and winding the yarn on a bobbin at a speed of more than 4500 m/min.
Claim 2
Independent Claim
83 words
The method of producing a highly oriented amorphous polyester filament feeder yarn for false twist texturing having a boiling shrinkage of 40 to 70%, which comprises melt-spinning a polyester in a spinneret into yarn filaments, shock-cooling the melt-spun yarn filaments by bringing them in contact with a cooled rotating surface at a distance of 35 to 60 cm from the spinneret for 1×10 -3 to 1×10 -2 seconds, and winding the yarn on a bobbin at a speed of more than 4500 m/min.
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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) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |