Patent US4002016A successfully refreshed from Google Patents.
US4002016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open end spinning apparatus
Assignee: Spinnerei Karl Marx VEB
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Filing: 1975-08-13
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Granted: 1977-01-11
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Expires: 1995-08-13
Abstract
Abstract In an open end spinning apparatus for converting staple fibers into yarn, the apparatus comprising a rotor having a rotatable surface to which a substantially parallel array of the fibers is fed substantially along the axis of the rotor and by engagement with which the fibers are twisted together, the improvement comprising a needle non-rotatably mounted adjacent the rotor and having a free end impinging on the path of travel of the array of fibers to the rotor and being directed obliquely of the rotor axis in the direction of the rotor, whereby the needle engages the array of fibers and thereby holds back the fibers at that point from co-rotating with the fibers engaged by the rotor.
Inventors
- 👤 Peter Fischer
- 👤 Bruno Schmidt
- 👤 Rolf Langer
- 👤 Gunter Trommer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:07
CPC Classifications
D; D01; D01H; D01H4/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
In an open end spinning apparatus for converting staple fibers into yarn, the apparatus comprising a rotor having a rotatable surface to which a substantially parallel array of the fibers is fed substantially along the axis of the rotor and by engagement with which the fibers are twisted together, the improvement comprising a needle non-rotatably mounted adjacent the rotor and having a free end impinging on the path of travel of the array of fibers to the rotor and being directed in the direction of the rotor, whereby the needle engages the array of fibers and thereby holds back the fibers at that point from co-rotating with the fibers engaged by the rotor.
Claim 2
Dependent Claim
113 words
In an open end spinning apparatus for converting staple fibers into yarn, the apparatus comprising a rotor having a rotatable surface to which a substantially parallel array of the fibers is fed substantially along the axis of the rotor and by engagement with which the fibers are twisted together, the improvement comprising a needle non-rotatably mounted adjacent the rotor and having a free end impinging on the path of travel of the array of fibers to the rotor and being directed in the direction of the rotor, whereby the needle engages the array of fibers and thereby holds back the fibers at that point from co-rotating with the fibers engaged by the rotor.
Claim 3
Dependent Claim
55 words
An open end spinning apparatus according to claim 1, further comprising a pair of driven rollers defining a nip through which the array of fibers is fed toward the rotor and means for generating an electrostatic field between the pair of rollers and the rotor for aligning the fibers with the axis of the rotor.
Claim 4
Dependent Claim
41 words
An open end spinning apparatus according to claim 2, in which the free end of the needle is pointed and the angle between a line tangential to the point of the needle and the rotor axis is from 0° to 45°.
Claim 5
Dependent Claim
16 words
An open end spinning apparatus according to claim 2, in which the needle is resiliently mounted.
Claim 6
Dependent Claim
15 words
An open end spinning apparatus according to claim 2, in which the needle is curved.
Claim 7
Dependent Claim
41 words
An open end spinning apparatus according to claim 3, in which the distance between the point of the needle and the nearest plane normal to the axis of the rotor and which intersects the rotor is from 10 to 40 mm.
Claim 8
Dependent Claim
29 words
An open end spinning apparatus according to claim 2, in which the distance between the needle and the nearer roller of said pair is from 1 to 10 mm.
Claim 9
Dependent Claim
22 words
An open end spinning apparatus according to claim 2, in which the diameter of the needle is from 0.1 to 0.5 mm.
Claim 10
Dependent Claim
24 words
An open end spinning apparatus according to claim 2, further comprising an electrically insulating mounting for the needle which mounting electrically isolates the needle.
Claim 11
Dependent Claim
47 words
An open end spinning apparatus according to claim 2, in which the feed rollers define two nips spaced apart from each other parallel to the axes of the rollers and through each nip is fed a respective parallel array of fibers toward the needle and the rotor.
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) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |