US3808652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of yarns
Assignee: Individual
•
Filing: 1971-11-23
•
Granted: 1974-05-07
•
Expires: 1991-11-23
Abstract
Abstract Apparatus for relaxing a running yarn composed of thermoplastic polymer material comprising a yarn supply means, a fluid tension device having a yarn passageway, means for introducing a gaseous fluid under pressure to the fluid tensioning device and a heating zone comprising an externally heated divergent passageway of a cross section steadily increasing from that of the yarn passageway.
Inventors
- 👤 D Elliott
- 👤 J Greenway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:47
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/16; D02G1/167
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
Apparatus for relaxing a running yarn composed of thermoplastic polymeric material comprising a yarn supply means, a fluid tension device having a yarn passageway, means for introducing a gaseous fluid under pressure to the fluid tensioning device and a heating zone comprising an externally heated divergent passageway of a cross section steadily increasing from that of the yarn passageway, the taper of said divergent passageway being not greater than 10*.
Claim 2
Dependent Claim
70 words
Apparatus for relaxing a running yarn composed of thermoplastic polymeric material comprising a yarn supply means, a fluid tension device having a yarn passageway, means for introducing a gaseous fluid under pressure to the fluid tensioning device and a heating zone comprising an externally heated divergent passageway of a cross section steadily increasing from that of the yarn passageway, the taper of said divergent passageway being not greater than 10*.
Claim 3
Dependent Claim
34 words
Apparatus according to claim 1 wherein the fluid tensioning device comprises a yarn passageway and means permitting entry thereinto of fluid under pressure and for directing it in the desired direction of yarn movement.
Claim 4
Dependent Claim
26 words
Apparatus according to claim 2 wherein the fluid entry means comprises a passageway connected to a supply of fluid under pressure opening into the yarn passageway.
Claim 5
Dependent Claim
53 words
Apparatus according to claim 2 wherein the fluid entry means comprises a second passageway positioned below the yarn passageway, substantially coaxial therewith and of larger bore into which the yarn passageway enters and which forms a continuation thereof, the junction of the two passageways being connected to a supply of fluid under pressure.
Claim 6
Dependent Claim
86 words
Apparatus for relaxing a running yarn composed of thermoplastic polymeric material comprising: means defining an externally heated, uniformly diverging passageway having an inlet and a concentric outlet of greater cross-section than the inlet; a fluid-operated yarn tension device which includes a stationary yarn passageway having a stationary discharge end in communication with the inlet of said diverging passageway; means for introducing gaseous fluid under pressure to the tension device; and yarn supply means for continuously supplying yarn to the yarn passageway in the yarn tension device.
Claim 7
Dependent Claim
86 words
Apparatus for relaxing a running yarn composed of thermoplastic polymeric material comprising: means defining an externally heated, uniformly diverging passageway having an inlet and a concentric outlet of greater cross-section than the inlet; a fluid-operated yarn tension device which includes a stationary yarn passageway having a stationary discharge end in communication with the inlet of said diverging passageway; means for introducing gaseous fluid under pressure to the tension device; and yarn supply means for continuously supplying yarn to the yarn passageway in the yarn tension device.
References Cited (Backward Citations)
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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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |