Patent US5400153A successfully refreshed from Google Patents.
Patent US3745757A successfully refreshed from Google Patents.
US3745757A
Expired / Lapsed
US
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Method of making textile yarns
Assignee: Imperial Chemical Industries Ltd
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Filing: 1971-05-10
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Granted: 1973-07-17
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Expires: 1991-05-10
Abstract
Abstract A compact yarn of staple fibres containing at least a proportion of potentially adhesive fibres bonded to contacting fibres. The compact yarn may be made by false twisting a sliver of the staple fibres by means of a fluid vortex followed by activating the potentially adhesive fibres.
Inventors
- 👤 A Selwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:14
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/0206; D02G1/0253; D02G1/0286; D02G3/00; D02G3/22; D02G3/40; D02G3/402
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
23 words
A process according to claim 1 in which the sliver of discontinuous fibres is false twisted by passing it through a fluid vortex.
Claim 2
Dependent Claim
26 words
A process according to claim 2 in which the fluid vortex is supplied with fluid at a temperature within the range 90* to 260* C inclusive.
Claim 3
Dependent Claim
16 words
A process according to claim 2 in which the potentially adhesive fibres are activated by heat.
Claim 4
Dependent Claim
17 words
A process according to claim 2 in which the potentially adhesive fibres are activated by chemical treatment.
Claim 5
Dependent Claim
18 words
A process according to claim 2 in which the potentially adhesive fibres are activated intermittently along their length.
Claim 6
Dependent Claim
60 words
A process for producing a compact yarn from a moving sliver comprising subjecting a sliver mixture of 75-95 percent of non-adhesive fibers and 5-25 percent adhesive fibers to false-twisting by means of a fluid supplied to a fluid vortex at an elevated temperature and thereafter activating the adhesive fibers to effect bonding of said fiber mixture into a compact yarn.
Claim 7
Dependent Claim
28 words
The process of claim 7 wherein the fluid in the fluid vortex is hot air or steam and the activation of the adhesive fibers is effected by heat.
Claim 8
Dependent Claim
32 words
The process of claim 8 wherein the fluid is hot air at a temperature of at least 150* C and the activating temperature of the adhesive fibers is at least 250* C.
Claim 9
Dependent Claim
24 words
The process of claim 7 wherein the adhesive fibers are composite fibers the components being arranged in a side-by-side or sheath and core relationship.
Claim 10
Dependent Claim
29 words
The process of claim 7 wherein the fluid in the fluid vortex is hot air or steam and the activation of the adhesive fibers is effected by chemical means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |