Patent US4474239A successfully refreshed from Google Patents.
US3810285A
Expired / Lapsed
US
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Method of producing bulked yarns
Assignee: John Heathcoat and Co Ltd
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Filing: 1971-04-05
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Granted: 1974-05-14
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Expires: 1991-04-05
Abstract
Abstract The method of producing bulked multifilament yarn consists in carrying forward yarn impregnated with a gaseous fluid and then suddenly expanding the fluid. The separated filaments of the yarn are then brought towards one another and again carried forward, the gaseous fluid acting as the carrier on both occasions.
Inventors
- 👤 K Murenbeeld
- 👤 D Ferrier
- 👤 T Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:44
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/16; D02G1/161; D02G1/12; D02G1/122
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
120 words
A method of producing bulked multifilament yarn in which the yarn filaments are separated to a predetermined extent, including the steps of impregnating a multifilament yarn with a gaseous fluid at one pressure, carrying the yarn continuously forward in a stream of the fluid, causing the fluid to expand suddenly to a lower pressure chosen to cause the fluid as it expands outwardly to separate the yarn filaments to an extent greater than the said predetermined extent, bringing the separated filaments against a deflecting surface so that they come toward one another in an amount such that the yarn filaments are separated to the said predetermined extent, and carrying the yarn continuously forward in a second stream of the fluid.
Claim 2
Independent Claim
120 words
A method of producing bulked multifilament yarn in which the yarn filaments are separated to a predetermined extent, including the steps of impregnating a multifilament yarn with a gaseous fluid at one pressure, carrying the yarn continuously forward in a stream of the fluid, causing the fluid to expand suddenly to a lower pressure chosen to cause the fluid as it expands outwardly to separate the yarn filaments to an extent greater than the said predetermined extent, bringing the separated filaments against a deflecting surface so that they come toward one another in an amount such that the yarn filaments are separated to the said predetermined extent, and carrying the yarn continuously forward in a second stream of the fluid.
Claim 3
Dependent Claim
15 words
A method as claimed in claim 1 including the additional step of crimp-setting the yarn.
Claim 4
Dependent Claim
39 words
A method as claimed in claim 2 in which the step of crimp-setting the yarn includes holding the yarn bulked to the desired degree in a non-tensioned condition for a period long enough to allow the yarn to set.
Claim 5
Dependent Claim
31 words
A method as claimed in claim 3 including the step of cooling the non-tensioned yarn by applying to it a fluid at a temperature low enough to accelerate the setting rate.
Claim 6
Dependent Claim
48 words
A method as claimed in claim 1 including the step of directing the yarn carried forward in the second stream of the fluid against one end of a plug formed of already bulked yarn and permitting the yarn to build up against the said end of the plug.
Claim 7
Dependent Claim
24 words
A method as claimed in claim 7 including the step of preheating the yarn before it enters the first stream of hot gaseous fluid.
Claim 8
Dependent Claim
31 words
A method of producing bulked multifilament yarn as claimed in claim 1 in which the yarn is thermoplastic and the fluid is at a temperature high enough to plasticize the yarn.
Claim 9
Independent Claim
182 words
A method of producing a bulked multifilament yarn in which the yarn filaments are separated to a predetermined extent, comprising initiating a first stream of hot gaseous fluid between a high pressure zone and an intermediate pressure zone and a second stream of the hot gaseous fluid between the intermediate pressure zone and a low pressure zone, immersing the yarn in the first stream of fluid so that it becomes impregnated with and is carried continuously forward by the fluid, causing the fluid of the first stream to expand suddenly into the intermediate pressure zone so that the yarn filaments become separated by the sudden expansion of the expanding fluid to an extent greater than the said predetermined extent, abruptly changing the direction of movement of the separated filaments by bringing the separated filaments against a deflecting surface so that they come toward one another in an amount such that the filaments are separated to the said predetermined extent, and entraining the yarn in the second stream of fluid so that it is carried by the fluid toward the low pressure zone.
Claim 10
Independent Claim
182 words
A method of producing a bulked multifilament yarn in which the yarn filaments are separated to a predetermined extent, comprising initiating a first stream of hot gaseous fluid between a high pressure zone and an intermediate pressure zone and a second stream of the hot gaseous fluid between the intermediate pressure zone and a low pressure zone, immersing the yarn in the first stream of fluid so that it becomes impregnated with and is carried continuously forward by the fluid, causing the fluid of the first stream to expand suddenly into the intermediate pressure zone so that the yarn filaments become separated by the sudden expansion of the expanding fluid to an extent greater than the said predetermined extent, abruptly changing the direction of movement of the separated filaments by bringing the separated filaments against a deflecting surface so that they come toward one another in an amount such that the filaments are separated to the said predetermined extent, and entraining the yarn in the second stream of fluid so that it is carried by the fluid toward the low pressure zone.
Claim 11
Dependent Claim
19 words
A method as claimed in claim 8 in which the fluid in the high pressure zone is maintained non-turbulent.
Claim 12
Dependent Claim
35 words
A method as claimed in claim 8 in which the yarn filaments are separated in the intermediate pressure zone transversely in a fan-like shape by constraining the fluid to expand laterally in a thin sheet.
Claim 13
Dependent Claim
34 words
A method as claimed in claim 8 in which some of the expanded fluid in the intermediate pressure zone is bled off leaving a portion of the original fluid to form the second stream.
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |