US3919833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction false-twist device
Assignee: Heberlein and Co AG
•
Filing: 1974-09-24
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Granted: 1975-11-18
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Expires: 1994-09-24
Abstract
Abstract In a false twist device of the friction type, a main friction element is formed with a yarn contact surface vaulted on all sides and having at least one annular groove transverse of its axis of rotation and a secondary friction element has at least one annular disc extending transversely with respect to its rotation axis and mating with the groove. Guide means feed and withdraw the yarn transversely with respect to the axis of rotation of the main friction element.
Inventors
- 👤 Lajos Horvath
- 👤 Arnold Steck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:14
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/08; D02G1/082
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
95 words
Friction false-twist device for textile yarns, comprising two parallel rotation shafts each supporting a friction element, the circumferences of which mutually, partially overlap, characterized by a main friction element formed with at least one yarn contact surface vaulted on all sides and with at least one annular groove and a secondary friction element formed with at least one circular disc, the rim of which mates with the annular groove of the main friction element, and guiding means for feeding and withdrawing the yarn transversely with respect to the rotation axis of the main friction element.
Claim 2
Dependent Claim
95 words
Friction false-twist device for textile yarns, comprising two parallel rotation shafts each supporting a friction element, the circumferences of which mutually, partially overlap, characterized by a main friction element formed with at least one yarn contact surface vaulted on all sides and with at least one annular groove and a secondary friction element formed with at least one circular disc, the rim of which mates with the annular groove of the main friction element, and guiding means for feeding and withdrawing the yarn transversely with respect to the rotation axis of the main friction element.
Claim 3
Dependent Claim
32 words
Device according to claim 1, characterized in that at least the rim of the secondary friction element consists of a material having a high friction coefficient with respect to the textile yarn.
Claim 4
Dependent Claim
22 words
Device according to claim 2, characterized in that at least the rim of the secondary friction element consists of polyurethane synthetic material.
Claim 5
Dependent Claim
18 words
Device according to claim 1, characterized in that the main friction element has the shape of a sphere.
Claim 6
Dependent Claim
21 words
Device according to claim 1, characterized in that the main friction element has the shape of an ellipsoid or the like.
Claim 7
Dependent Claim
22 words
Device according to claim 1, characterized in that the main friction element is a roughened base-element of aluminum having an oxide coating.
Claim 8
Dependent Claim
22 words
Device according to claim 4, characterized in that the main friction element is a roughened base-element of aluminum having an oxide coating.
Claim 9
Dependent Claim
22 words
Device according to claim 5, characterized in that the main friction element is a roughened base-element of aluminum having an oxide coating.
Claim 10
Dependent Claim
18 words
Device according to claim 1, characterized in that the main friction element consists of metal oxide ceramic material.
Claim 11
Dependent Claim
18 words
Device according to claim 4, characterized in that the main friction element consists of metal oxide ceramic material.
Claim 12
Dependent Claim
18 words
Device according to claim 5, characterized in that the main friction element consists of metal oxide ceramic material.
Claim 13
Dependent Claim
16 words
Device according to claim 1, characterized in that the main friction element consists of cast iron.
Claim 14
Dependent Claim
16 words
Device according to claim 4, characterized in that the main friction element consists of cast iron.
Claim 15
Dependent Claim
16 words
Device according to claim 5, characterized in that the main friction element consists of cast iron.
Claim 16
Dependent Claim
25 words
Device according to claim 1, characterized in that the main friction element consists of a compound material of silicium carbide and of polyurethane synthetic material.
Claim 17
Dependent Claim
25 words
Device according to claim 4, characterized in that the main friction element consists of a compound material of silicium carbide and of polyurethane synthetic material.
Claim 18
Dependent Claim
25 words
Device according to claim 5, characterized in that the main friction element consists of a compound material of silicium carbide and of polyUrethane synthetic material.
Claim 19
Dependent Claim
44 words
Device according to claim 1, characterized in that the annular grooves in the main friction element are formed by two spherical or ellipsoidal calotte-shaped members with at least one circular disc and spacer socket arranged between the discs and the spherical or ellipsoidal members.
Claim 20
Dependent Claim
44 words
Device according to claim 4, characterized in that the annular grooves in the main friction element are formed by two spherical or ellipsoidal calotte-shaped members with at least one circular disc and spacer socket arranged between the discs and the spherical or ellipsoidal members.
Claim 21
Dependent Claim
44 words
Device according to claim 5, characterized in that the annular grooves in the main friction element are formed by two spherical or ellipsoidal calotte-shaped members with at least one circular disc and spacer socket arranged between the discs and the spherical or ellipsoidal members.
Claim 22
Dependent Claim
30 words
Device according to claim 1, characterized in that the annular groove in the main friction element is formed by two spherical calotte-shaped members and by a spacer socket inserted therebetween.
Claim 23
Dependent Claim
30 words
Device according to claim 4, characterized in that the annular groove in the main friction element is formed by two spherical calotte-shaped members and by a spacer socket inserted therebetween.
Claim 24
Dependent Claim
30 words
Device according to claim 5, characterized in that the annular groove in the main friction element is formed by two spherical callotte-shaped members and by a spacer socket inserted therebetween.
Claim 25
Dependent Claim
33 words
Device according to claim 1, characterized in that the diameter of the disc or discs of the secondary friction elements at least approximately corresponds to the greatest diameter of the main friction element.
Claim 26
Dependent Claim
33 words
Device according to claim 1, characterized in that the ends of the rotation shaft of the main friction element, which extend beyond the latter, serve as guide means for yarn feed and removal.
Claim 27
Dependent Claim
28 words
Device according to claim 1, characterized in that the rotation shafts of the friction elements are shiftable perpendicularly with respect to the longitudinal axes of the friction elements.
Claim 28
Dependent Claim
22 words
Device according to claim 1, characterized in that at least the surface of the main friction element consists of polyurethane synthetic material.
Claim 29
Dependent Claim
22 words
Device according to claim 4, characterized in that at least the surface of the main friction element consists of polyurethane synthetic material.
Claim 30
Dependent Claim
22 words
Device according to claim 5, characterized in that at least the surface of the main friction element consists of polyurethane synthetic material.
Claim 31
Dependent Claim
29 words
Friction false-twist device according to claim 1, characterized in that the part of the main friction element which forms the vaulted yarn contact surface consists of two different materials.
Claim 32
Dependent Claim
29 words
Friction false-twist device according to claim 4, characterized in that the part of the main friction element which forms the vaulted yarn contact surface consists of two different materials.
Claim 33
Dependent Claim
29 words
Friction false-twist device according to claim 5, characterized in that the part of the main friction element which forms the vaulted yarn contact surface consists of two different materials.
Claim 34
Dependent Claim
26 words
Friction false-twist device according to claim 21, characterized in that the two calotte-shaped members which form the vaulted yarn contact surface consists of two different materials.
Claim 35
Dependent Claim
70 words
Device according to claim 30, characterized in that the part of the main friction element over the yarn contact surface of which the yarn passes in high-twisted condition, consists of a material the friction coefficient of which with respect to the yarn material is higher than the friction coefficient of the part of the main friction element over the yarn contact surface of which the yarn passes in untwisted condition.
Claim 36
Dependent Claim
33 words
Device according to claim 30, characterized in that the part of the main friction element over the yarn contact surface of which the yarn passes in high-twisted condition consists of polyurethane synthetic material.
Claim 37
Dependent Claim
33 words
Device according to claim 34, characterized in that the part of the main friction element over the yarn contact surface of which the yarn passes in high-twisted condition consists of polyurethane synthetic material.
Claim 38
Dependent Claim
32 words
Device according to claim 30, characterized in that the part of the main friction element over the yarn contact surface of which the yarn passes in untwisted condition consists of ceramic material.
Claim 39
Dependent Claim
32 words
Device according to claim 34, characterized in that the part of the main friction element over the yarn contact surface of which the yarn passes in untwisted condition consists of ceramic material.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |