US3925975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for piecing a thread in an open-end spinning unit
Assignee: Individual
•
Filing: 1974-10-10
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Granted: 1975-12-16
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Expires: 1994-10-10
Abstract
Abstract Apparatus for piecing a thread end in an open-end spinning unit which includes a clamping device having clamping members for clamping the thread end therebetween and means for moving the clamping members in a direction transverse to the longitudinal direction of the thread end while said thread end is clamped so as to effect at least a partial elimination of the spinning twist in the thread end. A gripping device is provided which is spaced from the clamping device for gripping the thread end and for accommodating insertion of the thread end, after the elimination of the spinning twist, into a spinning turbine containing a ring of open-up fibers to which the end is to be joined. Various preferred embodiments of clamping members are disclosed, including endless belts having runs in opposition to one another, cylindrical surface clamping members, and planar surface clamping members. A suction nozzle is provided for holding the thread end in position for the clamping and gripping operations and for removing a separated portion of the thread end prior to insertion of the thread end into the spinning turbine rotor.
Inventors
- 👤 Fritz Stahlecker
- 👤 Hans Stahlecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:02
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/48; D01H4/50; B; B65; B65H; B65H69/00; B65H69/06; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
139 words
Apparatus for piecing a thread end in an open-end spinning unit having a spinning rotor with a ring of opened-up fibers comprising: a clamping device containing a first clamping member, and a second clamping member, first clamp control means for moving said clamping members toward and away from one another to effect clamping and unclamping of a portion of said thread end therebetween, second clamp control means for moving said clamping members with respect to one another in a direction transverse to the longitudinal direction of said portion of said thread end while said portioN of said thread end is clamped between said clamping members to effect at least partial elimination of the spinning twist in said thread end, and a device for returning the thread end into the spinning rotor after said partial elimination of the spinning twist.
Claim 2
Dependent Claim
139 words
Apparatus for piecing a thread end in an open-end spinning unit having a spinning rotor with a ring of opened-up fibers comprising: a clamping device containing a first clamping member, and a second clamping member, first clamp control means for moving said clamping members toward and away from one another to effect clamping and unclamping of a portion of said thread end therebetween, second clamp control means for moving said clamping members with respect to one another in a direction transverse to the longitudinal direction of said portion of said thread end while said portioN of said thread end is clamped between said clamping members to effect at least partial elimination of the spinning twist in said thread end, and a device for returning the thread end into the spinning rotor after said partial elimination of the spinning twist.
Claim 3
Dependent Claim
31 words
Apparatus according to claim 1, wherein a gripping device is provided for gripping said thread end at a spacing from the portion of said thread end clamped by said clamping members.
Claim 4
Dependent Claim
39 words
Apparatus according to claim 2, wherein said spinning unit includes a windup mechanism for winding up the thread containing said thread end, and wherein said gripping device is disposed closer to said windup mechanism than are said clamping members.
Claim 5
Dependent Claim
23 words
Apparatus according to claim 3, wherein a separating device for separating the thread is arranged between the clamping members and the gripping device.
Claim 6
Dependent Claim
30 words
Apparatus according to claim 3, wherein means are provided for moving said clamping device and gripping device with respect to one another in the longitudinal direction of said thread end.
Claim 7
Dependent Claim
36 words
Apparatus according to claim 3, wherein at least one of said clamping device and said gripping device are mounted on a pivotally mounted swivel arm for accommodating relative movement of said clamping device and gripping device.
Claim 8
Dependent Claim
36 words
Apparatus according to claim 5, wherein at least one of said clamping device and said gripping device are mounted on a pivotally mounted swivel arm for accommodating relative movement of said clamping device and gripping device.
Claim 9
Dependent Claim
27 words
Apparatus according to claim 1, wherein a suction nozzle is provided for holding said thread end in a position to accommodate clamping thereof by said clamping device.
Claim 10
Dependent Claim
27 words
Apparatus according to claim 7, wherein a suction nozzle is provided for holding said thread end in a position to accommodate clamping thereof by said clamping device.
Claim 11
Dependent Claim
21 words
Apparatus according to claim 1, wherein at least one clamping surface of said clamping member is coated with a friction coating.
Claim 12
Dependent Claim
13 words
Apparatus according to claim 10, wherein said friction coating includes synthetic resinous material.
Claim 13
Dependent Claim
26 words
Apparatus according to claim 1, wherein at least one of said clamping members has a cylindrical shaped clamping surface for clampingly engaging said thread end portion.
Claim 14
Dependent Claim
26 words
Apparatus according to claim 7, wherein at least one of said clamping members has a cylindrical shaped clamping surface for clampingly engaging said thread end portion.
Claim 15
Dependent Claim
50 words
Apparatus according to claim 1, wherein at least one of said clamping members includes a movable belt with a clamping surface formed thereon, and wherein said second clamp control means includes means for moving said belt in a direction at right angles to said longitudinal direction of said thread end.
Claim 16
Dependent Claim
50 words
Apparatus according to claim 1, wherein each of said clamping members are formed as endless belts with clamping surfaces formed thereon, and wherein said second clamp control means includes means for moving said belts in mutually opposite directions with said thread end portion clamped between opposing faces of said belts.
Claim 17
Dependent Claim
31 words
Apparatus according to claim 1, wherein one of said clamping members is supported by a pair of parallel rods pivotally mounted at both the clamping member and a further support member.
Claim 18
Dependent Claim
20 words
Apparatus according to claim 12, wherein said second clamp control means includes means for rotating one of said clamping members.
Claim 19
Dependent Claim
24 words
Apparatus according to claim 1, wherein said first clamp control means includes a solenoid operated lever attached for movement with said first clamping members.
Claim 20
Dependent Claim
24 words
Apparatus according to claim 18, wherein said second clamp control means includes a tension cable attached to and movable with said second clamping member.
Claim 21
Dependent Claim
47 words
Apparatus according to claim 3, wherein said separating device includes means for forcibly pivoting a swivel arm supporting said clamping device so that said thread end is separated intermediate said gripping and clamping device while being clamped by said cLamping device and gripped by said gripping device.
References Cited (Backward Citations)
US2515172A
Cited
US3163976A
Cited
US3492804A
Cited
US3425205A
Cited
US3626440A
Cited
US3722198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |