US4145870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of textured filament yarns with the appearance of staple fibre yarns
Assignee: Bayer AG
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Filing: 1977-10-20
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Granted: 1979-03-27
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Expires: 1997-10-20
Abstract
Abstract The invention is related to a process for the production of staple-fibre-like textured continuous filament yarns by interlacing and false-twisting, wherein a partly drawn filament is heat-treated before the texturing process, this filament is subsequently interlaced with a non shrunken filament and both are finally subjected to draw texturing.
Inventors
- 👤 Rudolf J. Klee
- 👤 Gerd Arenz
- 👤 Herbert Scherzberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:52
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/0206; D02G1/18; Y; Y10; Y10S; Y10S57/00; Y10S57/908
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
A process for the preparation of staple-fiber-yarnlike textured filament yarns which comprises subjecting a partially drawn filament yarn to heat at a temperature of about 130° to 180° C. and thereafter interlacing said filament yarn with a filament yarn which has not been thermally treated and thereafter subjecting the resultant interlaced yarn to draw-texturing by the false-twist method.
Claim 2
Dependent Claim
58 words
A process for the preparation of staple-fiber-yarnlike textured filament yarns which comprises subjecting a partially drawn filament yarn to heat at a temperature of about 130° to 180° C. and thereafter interlacing said filament yarn with a filament yarn which has not been thermally treated and thereafter subjecting the resultant interlaced yarn to draw-texturing by the false-twist method.
Claim 3
Dependent Claim
24 words
A process as claimed in claim 1, wherein the heat treated filament yarn is interlaced with the non-thermally treated filament yarn prior to draw-texturing.
Claim 4
Dependent Claim
26 words
A process as claimed in claim 1, wherein the heat treated filament yarn and non-thermally treated filament-yarn are together subjected to draw texturing and subsequently interlaced.
Claim 5
Dependent Claim
43 words
A process as claimed in claim 1, wherein the partially drawn filament yarn is a polyester filament yarn obtained by spinning at a rate of from 3000 to 3500 m per minute and having a residual drawing ratio of from 1:1.5 to 1:1.7.
Claim 6
Dependent Claim
26 words
A process as claimed in claim 1, wherein the partially drawn filament yarn is heat treated in packaged form or, travelling continuously on a heating element.
Claim 7
Dependent Claim
23 words
A process as claimed in claim 1, wherein the partially drawn filament yarn undergoes from 10 to 50% shrinkage during the heat treatment.
Claim 8
Dependent Claim
18 words
A process as claimed in claim 1, wherein the partially drawn filament yarn is heat treated under tension.
Claim 9
Dependent Claim
25 words
A process as claimed in claim 1, wherein the filament yarns are together drawn in a ratio of 1:1.5 to 1:1.7 in a false-twist zone.
Claim 10
Dependent Claim
16 words
A process as claimed in claim 1, wherein the filament yarns are draw texturized under heat.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |