Patent US2364569A successfully refreshed from Google Patents.
Patent US4012897A successfully refreshed from Google Patents.
US4012897A
Expired / Lapsed
US
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Method and apparatus for twisting yarns
Assignee: Ogura Jewel Ind Co Ltd
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Filing: 1975-02-27
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Granted: 1977-03-22
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Expires: 1995-02-27
Abstract
Abstract Method and apparatus for twisting yarns for crimping purposes, wherein a yarn to be crimped is passed through a pair of opposingly rotating twisting discs in contact with circumferential faces thereof. The two twisting discs are disposed in small gap relation with each other for pressingly gripping the yarn therebetween and are rotating about the respective rotational axes which are non-parallel to each other and inclined in opposite directions relative to the length of input yarn with the respective circumferential faces turned toward a yarn gripping position from opposite sides thereof.
Inventors
- 👤 Junshiro Ogura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:15
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/08; D02G1/085
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
A method of twisting yarns, comprising the steps of passing a yarn to be crimped through a pair of opposingly rotating twisting discs in contact with circumferencial faces thereof, said twisting discs being disposed in small gap relation with each other, said gap being smaller than the yarn diameter, for pressingly gripping said yarn therebetween and rotating about the respective rotational axes which are non-parallel to each other and inclined at a predetermined angle in opposite directions relative to the length of input yarn to have the respective circumferencial faces turned toward a yarn gripping position from opposite sides thereof, rotating said twisting discs at slightly different circumferencial speeds, and urging said yarn toward said yarn gripping position.
Claim 2
Independent Claim
118 words
A method of twisting yarns, comprising the steps of passing a yarn to be crimped through a pair of opposingly rotating twisting discs in contact with circumferencial faces thereof, said twisting discs being disposed in small gap relation with each other, said gap being smaller than the yarn diameter, for pressingly gripping said yarn therebetween and rotating about the respective rotational axes which are non-parallel to each other and inclined at a predetermined angle in opposite directions relative to the length of input yarn to have the respective circumferencial faces turned toward a yarn gripping position from opposite sides thereof, rotating said twisting discs at slightly different circumferencial speeds, and urging said yarn toward said yarn gripping position.
Claim 3
Independent Claim
113 words
An apparatus for twisting yarns, comprising a pair of opposingly rotatable twisting discs disposed in small gap relation with each other for pressingly gripping between the circumferencial faces thereof a yarn to be crimped, said gap being smaller than the diameter of the yarn, and rotatable about the respective rotational axes which are non-parallel to each other and inclined at a predetermined angle in opposite directions relative to the length of input yarn to have the respective circumferencial faces turned toward a yarn gripping position from opposite sides thereof, said twisting discs being driven to rotate at slightly different circumferencial speeds, and guide means for urging said yarn toward said yarn gripping position.
Claim 4
Independent Claim
113 words
An apparatus for twisting yarns, comprising a pair of opposingly rotatable twisting discs disposed in small gap relation with each other for pressingly gripping between the circumferencial faces thereof a yarn to be crimped, said gap being smaller than the diameter of the yarn, and rotatable about the respective rotational axes which are non-parallel to each other and inclined at a predetermined angle in opposite directions relative to the length of input yarn to have the respective circumferencial faces turned toward a yarn gripping position from opposite sides thereof, said twisting discs being driven to rotate at slightly different circumferencial speeds, and guide means for urging said yarn toward said yarn gripping position.
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) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |