US3816990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for exchanging bobbins on an open-end spinning machine
Assignee: Fried Krupp AG
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Filing: 1973-03-21
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Granted: 1974-06-18
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Expires: 1993-03-21
Abstract
Abstract A device for treating a thread during a bobbin exchange on an open-end spinning machine, which is characterized primarily by a cutting device comprising shears operable during an advancing and retracting stroke of the cutting device, the cutting device having associated therewith devices by means of which a thread spun at full output of the spinning machine is during the advancing stroke of the cutting device caught and centered toward the shears, is held stationary during the cutting operation, is subjected to suction during a bobbin exchange, and subsequent to the bobbin exchange is automatically conveyed onto an empty bobbin sleeve on a bobbin holder.
Inventors
- 👤 H Hoffmann
- 👤 H Schiebenhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:24
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/48; B; B65; B65H; B65H67/00; B65H67/04; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
153 words
In combination with an open-end spinning machine comprising a spinning turbine and a bobbin holder adapted to receive a bobbin sleeve onto which a thread is wound passing along a thread path from said turbine to the bobbin sleeve, a device for treAting the thread during a bobbin exchange on said bobbin holder, which includes: a cutting device provided with shear means and reciprocably movable into and out of said thread path in a direction transverse thereto to carry out an advance and retraction stroke, and means associated with said cutting device and operable in response to the advance stroke of said cutting device to cause said thread to be caught and centered and to be held fast during the cutting of said thread and to be subjected to a suction effect during the bobbin exchange, and following the bobbin exchange to be passed onto an empty bobbin sleeve on said bobbin holder.
Claim 2
Dependent Claim
153 words
In combination with an open-end spinning machine comprising a spinning turbine and a bobbin holder adapted to receive a bobbin sleeve onto which a thread is wound passing along a thread path from said turbine to the bobbin sleeve, a device for treAting the thread during a bobbin exchange on said bobbin holder, which includes: a cutting device provided with shear means and reciprocably movable into and out of said thread path in a direction transverse thereto to carry out an advance and retraction stroke, and means associated with said cutting device and operable in response to the advance stroke of said cutting device to cause said thread to be caught and centered and to be held fast during the cutting of said thread and to be subjected to a suction effect during the bobbin exchange, and following the bobbin exchange to be passed onto an empty bobbin sleeve on said bobbin holder.
Claim 3
Dependent Claim
29 words
An arrangement according to claim 1, which includes guiding means for guiding the thread, said guiding means being arranged on said cutting device and ahead of said shear means.
Claim 4
Dependent Claim
31 words
An arrangement according to claim 1, which includes a clamping device arranged on said cutting device for holding the thread fast above said shear means when said thread is being cut.
Claim 5
Dependent Claim
18 words
An arrangement according to claim 3, in which said clamping device is arranged on said shear means itself.
Claim 6
Dependent Claim
59 words
An arrangement according to claim 1, which includes suction conduit means arranged on said cutting device and having its suction mouth located within the region below said shear means, and means for making said suction conduit means temporarily ineffective to permit a thread automatically to engage an empty bobbin sleeve and carry out the initial winding up step thereon.
Claim 7
Dependent Claim
40 words
An arrangement according to claim 5, which includes a closure member arranged at said suction mouth and operable respectively to open and close said suction mouth in response to said cutting device carrying out an advancing and retraction stroke respectively.
Claim 8
Dependent Claim
27 words
An arrangement according to claim 5, in which said suction conduit means is formed by position-variable conveying means connecting said suction mouth to said suction conduit means.
Claim 9
Dependent Claim
17 words
An arrangement according to claim 7, in which said position-variable conveying means includes a telescopic pipe system.
Claim 10
Dependent Claim
16 words
An arrangement according to claim 7, in which said position-variable conveying means includes a flexible hose.
Claim 11
Dependent Claim
30 words
An arrangement according to claim 7, in which said suction conduit means includes a collecting passage of a suction system independent of a central suction means for said spinning turbine.
Claim 12
Dependent Claim
49 words
An arrangement according to claim 1, which includes guiding plate means adapted during a bobbin exchange to be moved into said thread path so that the thread passes over said guiding plate means first to said suction conduit means and subsequently to an empty bobbin on said bobbin holder.
References Cited (Backward Citations)
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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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |