US3828541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction false-twist device
Assignee: Heberlein and Co AG
•
Filing: 1973-05-01
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Granted: 1974-08-13
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Expires: 1993-05-01
Abstract
Abstract A friction false-twist device has at least one pair of friction discs mounted on parallel shafts for rotation about the axes thereof and a swivel shaft has at least two thread-guide elements thereon arranged so that at least one guide element is above and one guide element is below the discs.
Inventors
- 👤 J Raschle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:30
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/08; D02G1/082
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
108 words
Friction false-twist device for textile yarns with at least one friction element consisting of a pair of parallel shafts and at least one disc mounted for rotation about the axis of each shaft thereof, characterized by a swivel shaft (5) and a threadguide device which comprises at least two thread-guide elements (8, 9) adapted to guide a yarn end seriallY traversing the elements and so arranged on said shaft that in operation at least one thread-guide element is present above and one below the respective friction elements, whereby a yarn end may traverse one guide element before and the other guide element after running over the friction element.
Claim 2
Dependent Claim
108 words
Friction false-twist device for textile yarns with at least one friction element consisting of a pair of parallel shafts and at least one disc mounted for rotation about the axis of each shaft thereof, characterized by a swivel shaft (5) and a threadguide device which comprises at least two thread-guide elements (8, 9) adapted to guide a yarn end seriallY traversing the elements and so arranged on said shaft that in operation at least one thread-guide element is present above and one below the respective friction elements, whereby a yarn end may traverse one guide element before and the other guide element after running over the friction element.
Claim 3
Dependent Claim
18 words
Device according to claim 1, wherein said discs overlap in a zone of between 1 and 10 mm.
Claim 4
Dependent Claim
18 words
Device according to claim 2, wherein said discs overlap in a zone of between 3 and 4 mm.
Claim 5
Dependent Claim
22 words
Device according to claim 2, wherein the distance between said discs at the overlapping zones thereof is between 0.5 and 1.5 mm.
Claim 6
Dependent Claim
46 words
Device according to claim 1, wherein said friction element comprises two axially parallel circular discs, characterized in that the thread-guide elements (8, 9; 10, 11) are so arranged on said shaft (5) that they each extend perpendicular to each of the discs shafts when in operation.
Claim 7
Dependent Claim
27 words
Device according to claim 5, characterized in that the thread-guide elements (8, 9) are centrally positioned along a straight line between the disc shafts when in operation.
Claim 8
Dependent Claim
36 words
Device according to claim 5, characterized in that the thread-guide elements (10, 11) are in a symmetrically displaced position from the middle of a line perpendicular to the axes of said disc shafts when in operation.
Claim 9
Dependent Claim
23 words
Device according to claim 5, characterized in that means (12, 13, 22) are provided maintaining the position of said thread-guide elements in operation.
Claim 10
Dependent Claim
32 words
Device according to claim 5, characterized in that means (14, 15, 16) are provided to control the position of the thread-guide elements when in operation responsive to the tension in the yarn.
Claim 11
Dependent Claim
17 words
Device according to claim 1, characterized in that the thread-guide elements (8, 9) are of tubular shape.
Claim 12
Dependent Claim
20 words
Device according to claim 10, characterized in that the thread-guide elements have an interior width of between 0.5 and 3mm.
Claim 13
Dependent Claim
22 words
Device according to claim 1, 1, characterized in that the thread-guide elements have a slot through which the yarn may be inserted.
Claim 14
Dependent Claim
33 words
Device according to claim 1, characterized in that the respective extremities of said thread-guide elements be opposite the circular discs and are spaced a distance from each other of up to 30 mm.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |