US3924394A
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: 1975-12-09
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Expires: 1994-10-10
Abstract
Abstract Apparatus for piecing a thread end in an open-end spinning unit having a spinning rotor with a ring of open-up fibers including opening means having friction tool means for fraying the thread end at a predetermined location and a device for returning the thread end into the spinning rotor after fraying thereof by the friction tool means. Preferred embodiments of the friction tool means include rotatably mounted friction tool members as well as non-rotatably mounted friction tool means. The friction tool means have roughened surfaces in the form of a file in some embodiments, while having brush like surfaces in other embodiments. Various means are provided for adjusting the position of the friction tools and for operating same to effect roughening or fraying of the thread, including surfaces designed to effect a severing of the thread after a preliminary roughening. Clamping devices are also provided for clamping the thread at opposite sides of the friction tool, which clamping devices are movable with respect to one another to effect severing of the thread after being frayed.
Inventors
- 👤 Fritz Stahlecker
- 👤 Hans Stahlecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:34
CPC Classifications
D; D01; D01H; D01H9/00; D01H9/02; D01H9/16; B; B65; B65H; B65H69/00; B65H69/06; D01H4/00; D01H4/48; D01H4/50; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
57 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: opening means including friction tool means for fraying the thread end at a predetermined location, and a device for returning the thread end into the spinning rotor after fraying thereof by the friction tool means.
Claim 2
Dependent Claim
57 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: opening means including friction tool means for fraying the thread end at a predetermined location, and a device for returning the thread end into the spinning rotor after fraying thereof by the friction tool means.
Claim 3
Dependent Claim
35 words
Apparatus according to claim 1, wherein the opening means includes a pair of clamping devices for clamping said thread at respective opposite sides of the predetermined location where said friction tool means frays said thread.
Claim 4
Dependent Claim
23 words
Apparatus according to claim 2, wherein said opening means includes means for moving said friction tool means toward and away from said thread.
Claim 5
Dependent Claim
31 words
Apparatus according to claim 1, wherein said friction tool means includes a file member which is driven in a reciprocating motion at right angles to the longitudinal direction of the thread.
Claim 6
Dependent Claim
31 words
Apparatus according to claim 1, wherein said friction tool means includes a brush member which is driven in a reciprocating motion at right angles to the longitudinal direction of the thread.
Claim 7
Dependent Claim
31 words
Apparatus according to claim 3, wherein said friction tool means includes a file member which is driven in a reciprocating motion at right angles to the longitudinal direction of the thread.
Claim 8
Dependent Claim
31 words
Apparatus according to claim 3, wherein said friction tool means includes a brush member which is driven in a reciprocating motion aT right angles to the longitudinal direction of the thread.
Claim 9
Dependent Claim
35 words
Apparatus according to claim 1, wherein said friction tool means includes a body of rotation with a roughened friction surface which is driven about an axis extending transverse to the longitudinal direction of the thread.
Claim 10
Dependent Claim
35 words
Apparatus according to claim 3, wherein said friction tool means includes a body of rotation with a roughened friction surface which is driven about an axis extending transverse to the longitudinal direction of the thread.
Claim 11
Dependent Claim
17 words
Apparatus according to claim 8, wherein said axis extends obliquely to the longitudinal direction of the thread.
Claim 12
Dependent Claim
40 words
Apparatus according to claim 10, wherein adjusting means are provided for adjusting the angular inclination of said axis with respect to the longitudinal direction of the thread to accommodate for the direction and inclination of spinning fibers forming said thread.
Claim 13
Dependent Claim
17 words
Apparatus according to claim 9, wherein said axis extends obliquely to the longitudinal direction of the thread.
Claim 14
Dependent Claim
40 words
Apparatus according to claim 12, wherein adjusting means are provided for adjusting the angular inclination of said axis with respect to the longitudinal direction of the thread to accommodate for the direction and inclination of spinning fibers forming said thread.
Claim 15
Dependent Claim
66 words
Apparatus according to claim 2, wherein the clamping device disposed on the side of the friction tool means which is closest to the extreme free end of the thread is mounted for movement in the longitudinal direction of the thread, and wherein means are provided for moving said last-mentioned clamping device in said longitudinal direction to effect separation of said thread at the frayed part thereof.
Claim 16
Dependent Claim
22 words
Apparatus according to claim 14, wherein a windup means for said thread is disposed at a position spaced from said clamping device.
Claim 17
Dependent Claim
66 words
Apparatus according to claim 4, wherein the clamping device disposed on the side of the friction tool means which is closest to the extreme free end of the thread is mounted for movement in the longitudinal direction of the thread, and wherein means are provided for moving said last-mentioned clamping device in said longitudinal direction to effect separation of said thread at the frayed part thereof.
Claim 18
Dependent Claim
66 words
Apparatus according to claim 5, wherein the clamping device disposed on the side of the friction tool means which is closest to the extreme free end of the thread is mounted for movement in the longitudinal direction of the thread, and wherein means are provided for moving said last-mentioned clamping device in said longitudinal direction to effect separation of said thread at the frayed part thereof.
Claim 19
Dependent Claim
66 words
Apparatus according to claim 8, wherein the clamping device disposed on the side of the friction tool means which is closest to the extreme free end of the thread is mounted for movement in the longitudinal direction of the thread, and wherein means are provided for moving said last-mentioned clamping device in said longitudinal direction to effect separation of said thread at the frayed part thereof.
Claim 20
Dependent Claim
47 words
Apparatus according to claim 2, wherein one of said clamping devices contains two clamping surfaces which are mutually displaceable at right angles to the longitudinal direction of the thread while in a clamped position for effecting at least partial elimination of the spinning twist in said thread.
Claim 21
Dependent Claim
47 words
Apparatus according to claim 4, wherein one of said clamping devices contains two clamping surfaces which are mutually displaceable at right angles to the longitudinal direction of the thread while in a clamped position for effecting at least partial elimination of the spinning twist in said thread.
Claim 22
Dependent Claim
47 words
Apparatus according to claim 5, wherein one of said clamping devices contains two clamping surfaces which are mutually displaceable at right angles to the longitudinal direction of the thread while in a clamped position for effecting at least partial elimination of the spinning twist in said thread.
Claim 23
Dependent Claim
47 words
Apparatus according to clAim 8, wherein one of said clamping devices contains two clamping surfaces which are mutually displaceable at right angles to the longitudinal direction of the thread while in a clamped position for effecting at least partial elimination of the spinning twist in said thread.
Claim 24
Dependent Claim
47 words
Apparatus according to claim 14, wherein one of said clamping devices contains two clamping surfaces which are mutually displaceable at right angles to the longitudinal direction of the thread while in a clamped position for effecting at least partial elimination of the spinning twist in said thread.
Claim 25
Dependent Claim
27 words
Apparatus according to claim 1, wherein a thread supporting device is arranged in facing relationship to said friction tool means for supporting said thread during fraying operations.
Claim 26
Dependent Claim
27 words
Apparatus according to claim 4, wherein a thread supporting device is arranged in facing relationship to said friction tool means for supporting said thread during fraying operations.
Claim 27
Dependent Claim
27 words
Apparatus according to claim 5, wherein a thread supporting device is arranged in facing relationship to said friction tool means for supporting said thread during fraying operations.
Claim 28
Dependent Claim
27 words
Apparatus according to claim 8, wherein a thread supporting device is arranged in facing relationship to said friction tool means for supporting said thread during fraying operations.
Claim 29
Dependent Claim
18 words
Apparatus according to claim 24, wherein an air nozzle oriented toward the thread serves as the supporting device.
Claim 30
Dependent Claim
59 words
Apparatus according to claim 1, wherein said friction tool means is a conical file member having differently fashioned friction surfaces over its length with a first friction surface on a smaller diameter portion for effecting a preliminary roughening of the thread and a second friction surface as a larger diameter portion for executing a subsequent severing of the thread.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |