US3589120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for winding polyamide yarn packages with tapered end-portions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1968-11-29
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Granted: 1971-06-29
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Expires: 1988-11-29
Abstract
Abstract A method of producing low barre heat relaxed polyamide yarn packages with long-to-short build by means of a programmed central feed which maintains a constant traveler speed and correspondingly reduces the balloon tension.
Inventors
- 👤 David Meredith Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:53
CPC Classifications
D; D01; D01H; D01H1/00; D01H1/14; D01H1/20; D01H1/28; D01H1/30; D01H1/305; B; B65; B65H; B65H2513/00; B65H2513/10; B65H2513/11; B65H2515/00; B65H2515/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
39 words
The process of claim 1 wherein said gradient is obtained by gradually reducing the balloon tension on the yarn during the winding cycle by maintaining a constant traveller speed coupled with a decreasing spindle speed during the winding operation.
References Cited (Backward Citations)
US3025660A
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US3069836A
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US3081593A
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US3161913A
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US3325985A
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US3377793A
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US3358433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |