US3733799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forward and reverse yarn feeding device for withdrawing and piecing yarn in a spinning apparatus
Assignee: Oerlikon Textile GmbH and Co KG
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Filing: 1971-08-06
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Granted: 1973-05-22
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Expires: 1991-08-06
Abstract
Abstract In a spinning apparatus there is provided a yarn device which has two continuously and oppositely oppositely spaced rollers (a withdrawing roller and a reversing roller) and a pinch roller shiftable, in response to the tension of the spun yarn, into engagement with either withdrawing to advance the yarn forward from a spinning device to a winding device, or the reversing reversing to return the yarn, in case of breakage, to the spinning device for piecing. In either operative position, the pinch roller projects the space between the withdrawing roller and the reversing roller.
Inventors
- 👤 E Roethke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:14
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/48; D01H4/50; B; B65; B65H; B65H51/00; B65H51/02; B65H51/04; B65H51/08; B65H51/10; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
273 words
In a forward and reverse feeding device for withdrawing and piecing yarn in an open-end spinning apparatus including a spinning turbine, the improvement comprising A. a continuously driven withdrawing roller having a fixed rotational axis, B. a continuously driven reversing roller having a fixed rotational axis and being radially spaced from said withdrawing roller, C. a carrier swingable about a stationary pivotal axis, D. an idling pinch roller rotatably supported by bearing means affixed to said carrier, the rotational axes of said pinch roller, said withdrawing roller, said reversing roller and the pivotal axis of said carrier being spaced from and parallel with one another, said pinch roller being adapted to assume a first work position in which it is in engagement with and is driven by said withdrawing roller for withdrawing said yarn from said spinning turbine in a forward feed, said pinch roller being adapted to assume a second work position in which it is in engagement with and is driven by said reversing roller for reintroducing said yarn in a reverse feed into said turbine upon yarn breakage, in both said work positions said pinch roller projecting into the space between said withdrawing roller and said reversing roller, E. actuating means connected to said carrier for causing a swinging motion thereof to move said pinch roller from one work position into the other and F. sensor means for energizing said actuating means as a function of yarn tension to cause said pinch roller to move into said second work position upon yarn breakage and to move into said first position upon piecing of the reintroduced yarn in said spinning turbine.
Claim 2
Dependent Claim
273 words
In a forward and reverse feeding device for withdrawing and piecing yarn in an open-end spinning apparatus including a spinning turbine, the improvement comprising A. a continuously driven withdrawing roller having a fixed rotational axis, B. a continuously driven reversing roller having a fixed rotational axis and being radially spaced from said withdrawing roller, C. a carrier swingable about a stationary pivotal axis, D. an idling pinch roller rotatably supported by bearing means affixed to said carrier, the rotational axes of said pinch roller, said withdrawing roller, said reversing roller and the pivotal axis of said carrier being spaced from and parallel with one another, said pinch roller being adapted to assume a first work position in which it is in engagement with and is driven by said withdrawing roller for withdrawing said yarn from said spinning turbine in a forward feed, said pinch roller being adapted to assume a second work position in which it is in engagement with and is driven by said reversing roller for reintroducing said yarn in a reverse feed into said turbine upon yarn breakage, in both said work positions said pinch roller projecting into the space between said withdrawing roller and said reversing roller, E. actuating means connected to said carrier for causing a swinging motion thereof to move said pinch roller from one work position into the other and F. sensor means for energizing said actuating means as a function of yarn tension to cause said pinch roller to move into said second work position upon yarn breakage and to move into said first position upon piecing of the reintroduced yarn in said spinning turbine.
Claim 3
Dependent Claim
58 words
An improvement as defined in claim 1, wherein the pivotal angle through which the rotational axis of the pinch roller is displaced to bring the latter from one work position into the other is smaller than the angle between the rotational axes of said withdrawing roller and said reversing roller relative to said pivotal axis of said carrier.
Claim 4
Dependent Claim
18 words
An improvement as defined in claim 2, wherein the first-named angle is maximum one-half of the last-named angle.
Claim 5
Dependent Claim
34 words
An improvement as defined in claim 1, wherein the distance between the rotational axis of said pinch roller and the pivotal axis of said carrier is smaller than the radius of said pinch roller.
Claim 6
Dependent Claim
20 words
An improvement as defined in claim 4, wherein said distance is smaller than one-half the radius of said pinch roller.
Claim 7
Dependent Claim
43 words
An improvement as defined in claim 1, wherein the distance between the rotational axis of said pinch roller and the pivotal axis of said carrier is smaller than the radius of said withdrawing roller and smaller than the radius of said reversing roller.
Claim 8
Dependent Claim
30 words
An improvement as defined in claim 1, wherein the angle between the rotational axes of said withdrawing roller and said reversing roller relative to said pivotal axis is about 60-120*.
Claim 9
Dependent Claim
60 words
An improvement as defined in claim 1, wherein the rotational axis of said pinch roller is located adjacent that side of a first plane which is remote from a second plane parallel with said first plane, said first plane contains said pivotal axis of said carrier and said second plane contains the rotational axes of said withdrawing and reversing rollers.
Claim 10
Dependent Claim
30 words
An improvement as defined in claim 1, wherein the extent of motion of the rotational axis of said pinch roller between said two work positions thereof is maximum 5 mm.
Claim 11
Dependent Claim
111 words
An improvement as defined in claim 1, wherein said actuating means includes A. a first setting member comprising an energizable power means which, when energized, applies a first torque to said carrier for moving said pinch roller into one of said work positions and forcing it into contact with one of said continuously driven rollers and B. a second setting member comprising a spring means to continuously apply a second torque to said carrier for moving said pinch roller into the other of said work positions and forcing it into contact with the other of said continuously driven rollers, said second torque being smaller than and opposite to said first torque.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |