US3875734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction false twisting device
Assignee: DUPEUBLE JEAN#CLAUDE
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Filing: 1974-01-16
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Granted: 1975-04-08
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Expires: 1994-01-16
Abstract
Abstract A friction false twisting device for texturizing yarn including at least three friction elements rotatably contacting yarn to be texturized, each of the friction elements being formed of a polished material having a coefficient of friction less than 0.5, high hardness and minimal elasticity, preferably the polished material being a ceramic with a high content of titanium oxide or fritted alumina having a Rockwell hardness HRC greater than 60, a coefficient of friction within the range of 0.410 to 0.450 and an elasticity of practically zero.
Inventors
- 👤 Jean-Claude Dupeuble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:34
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
45 words
A friction false twisting device for texturizing yarn comprising at least three friction elements for movably contacting yarn to be texturized, each of said friction elements being formed of a polished material having a coefficient of friction less than 0.5, high hardness and minimal elasticity.
Claim 2
Dependent Claim
45 words
A friction false twisting device for texturizing yarn comprising at least three friction elements for movably contacting yarn to be texturized, each of said friction elements being formed of a polished material having a coefficient of friction less than 0.5, high hardness and minimal elasticity.
Claim 3
Dependent Claim
25 words
A friction false twisting device for texturizing yarn as recited in claim 1 wherein said polished material has a Rockwell hardness HRC greater than 60.
Claim 4
Dependent Claim
30 words
A friction false twisting device for texturizing yarn as recited in claim 2 wherein said polished material has a coefficient of friction within the range of from 0.410 to 0.450.
Claim 5
Dependent Claim
30 words
A friction false twisting device for texturizing yarn as recited in claim 3 wherein said polished material is a ceramic with a high content of titanium oxide or fritted alumina.
Claim 6
Dependent Claim
49 words
A friction false twisting device for texturizing yarn as recited in claim 4 and further comprising a pair of parallel, oppositely rotating, hollow spindles, one of said friction elements being disposed at each of the ends of said spindles and each of said friction elements having a toroidal configuration.
Claim 7
Dependent Claim
30 words
A friction false twisting device for texturizing yarn as recited in claim 1 wherein said polished material has a coefficient of friction within the range of from 0.410 to 0.450.
Claim 8
Dependent Claim
30 words
A friction false twisting device for texturizing yarn as recited in claim 1 wherein said polished material is a ceramic with a high content of titanium oxide or fritted alumina.
Claim 9
Dependent Claim
49 words
A friction false twisting device for texturizing yarn as recited in claim 1 and further comprising a pair of parallel, oppositely rotating, hollow spindles, one of said friction elements being disposed at each of the ends of said spindles and each of said friction elements having a toroidal configuration.
References Cited (Backward Citations)
US3066473A
Cited
US3564833A
Cited
US3535866A
Cited
US3537250A
Cited
US3756006A
Cited
US3706194A
Cited
US3745755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |