Patent FR1272412A successfully refreshed from Google Patents.
US3910027A
Expired / Lapsed
US
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Process for the simultaneous stretch texturing of filament yarn
Assignee: Bayer AG
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Filing: 1973-12-05
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Granted: 1975-10-07
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Expires: 1993-12-05
Abstract
Abstract A process for the production of a textured endless yarn by the simultaneous false twisting and stretch texturing of an unstretched or incompletely stretched yarn of a high molecular weight, fibre-forming linear polymer, using at least two heating zones separated from each other in space between the delivery cylinder and the draw-off roller, in which process the yarn is delivered from the delivery cylinder to a first heating zone, heated in this heating zone without substantial mechanical stress at a low yarn tension to a yarn temperature above the glass temperature and thereafter, at a higher yarn tension built up between the first and second heating zone or in the first heating zone, it is stretched and simultaneously friction false-twisted and heat fixed between the delivery cylinder and the draw-off roller at a yarn temperature of below 160*C.
Inventors
- 👤 Hans Bach
- 👤 Udo Hansel
- 👤 Karl-August Heinroth
- 👤 Hans-Dieter Jurischka
- 👤 Rudolf Jurgen Klee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:25
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/0206; D02G1/022
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
166 words
Process for the production of a textured endless yarn by the simultaneous false twisting and stretch texturing of unstretched or not completely stretched yarn of high molecular weight, fibreforming linear polymers, in particular polyesters, using at least two heating zones separated from each other in space between the delivery cylinder and the draw-off roller, in which process the yarn is delivered from the delivery cylinder to a first heating zone at texturing velocities of 200 to 600 metres per minute, is heated in this heating zone without substantial mechanical stress at yarn tensions of less than 0.05 p/dtex to a yarn temperature between T glass temperature and T + 50*C, and thereafter, at yarn tensions of 0.1 to 0.5 p/dtex, which build up between the first and second heating zone, it is stretched in the ratio of between 1 : 1.5 and 1 : 4.5 and simultaneously friction false twisted and heat fixed between the delivery cylinder and draw-off roller at yarn temperatures of below 160*C.
Claim 2
Dependent Claim
166 words
Process for the production of a textured endless yarn by the simultaneous false twisting and stretch texturing of unstretched or not completely stretched yarn of high molecular weight, fibreforming linear polymers, in particular polyesters, using at least two heating zones separated from each other in space between the delivery cylinder and the draw-off roller, in which process the yarn is delivered from the delivery cylinder to a first heating zone at texturing velocities of 200 to 600 metres per minute, is heated in this heating zone without substantial mechanical stress at yarn tensions of less than 0.05 p/dtex to a yarn temperature between T glass temperature and T + 50*C, and thereafter, at yarn tensions of 0.1 to 0.5 p/dtex, which build up between the first and second heating zone, it is stretched in the ratio of between 1 : 1.5 and 1 : 4.5 and simultaneously friction false twisted and heat fixed between the delivery cylinder and draw-off roller at yarn temperatures of below 160*C.
Claim 3
Dependent Claim
31 words
Process according to claim 1, wherein the yarn tension of 0.1 to 0.5 p/dtex which build up between the first and second heating zone are built up on a stretching pin.
Claim 4
Dependent Claim
31 words
Process according to claim 1, wherein the yarn tension of 0.1 to 0.5 p/dtex which builds up between the first and second heating zone are built up on a stretching pin.
Claim 5
Dependent Claim
30 words
Process according to claim 3, wherein the first heating zone comprises a material selected from the group consisting of a hot pin, a heatable roller and a conduction heating element.
Claim 6
Dependent Claim
39 words
Process according to claim 1, wherein the yarn tension of 0.1 to 0.5 p/dtex is built up on a hot pin heated to temperatures above 270*C which constitutes the first heating zone and around which the yarn is looped.
Claim 7
Dependent Claim
24 words
Process according to claim 1, wherein the yarn tensions which build up between the first and second heating zone are 0.3 to 0.4 p/dtex.
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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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |