Patent US3928987A successfully refreshed from Google Patents.
US3928987A
Expired / Lapsed
US
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Thread supply device for textile machines
Assignee: Iro AB
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Filing: 1974-08-08
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Granted: 1975-12-30
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Expires: 1994-08-08
Abstract
Abstract A thread supply device for a textile machine, comprising a thread drum which can be set in rotation and upon which there is tangentially wound a thread issuing from a storage bobbin in order to form an intermediate supply and from which drum the thread may be unwound vertically over a withdrawal rim of the drum and through a withdrawal eye assembly which is disposed coaxially to the drum and which comprises a cut-off eye which may be pivoted transversely to the thread passage due to spring action. A thread control element is stationarily arranged in the area of the path of the withdrawn thread adjacent the withdrawal rim, and against which thread control element the thread abuts laterally due to the withdrawal tension during positive thread supply. The cut-off eye is the first eye of the withdrawal eye assembly traversed by the thread after it has passed the withdrawal rim, and the spring load urges the cut-off eye away from the imaginary thread drum axis into the area below the withdrawal rim, into which area is also moved the point at which the thread leaves the withdrawal rim during a reduction of the withdrawal tension, whereby the thread tension assists the spring force in moving the cut-off eye into a deactivating or warning position.
Inventors
- 👤 Jacobsson Kurt Arne Gunnar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:57
CPC Classifications
D; D04; D04B; D04B15/00; D04B15/38; D04B15/48; D04B15/482
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
349 words
In a thread supply device for a textile machine, in particular a knitting machine, said thread supply device including drum means upon which a thread can be tangentially wound to form an intermediate thread storage and from which the thread can be unwound axially over a withdrawal rim associated with the drum means, a thread control member positioned adjacent the withdrawal rim of said drum means for engaging the withdrawn thread to limit the withdrawal rate of thread from said drum means substantially to the rate at which thread is wound on the drum means to thereby provide a positive thread supply, and a thread guide assembly disposed in substantial alignment with the longitudinal axis of said drum means for guiding the thread withdrawn from said drum means after it passes over the withdrawal rim, the thread guide assembly including a first thread guide element aligned with the axis of said drum means and disposed in engagement with the withdrawn thread, the thread guide assembly including a second thread guide element disposed adjacent the first thread guide element and means mounting the second thread guide element for pivotal movement substantially transversely relative to the thread passage therepast, the second thread guide element being substantially coaxially aligned with the axis of said drum means during positive thread supply, and spring means coacting with said second thread guide element for urging same transversely away from its position of alignment with the axis of said drum means, comprising the improvement wherein the withdrawn thread after passing over the withdrawal rim and the thread control member is supplied directly to the second thread guide element, said second thread guide element engaging the thread as withdrawn from the drum means prior to engagement thereof by any other part of the thread guide assembly, and said spring means normally swingably urging said second thread guide element outwardly toward an area which is substantially aligned with a part of the withdrawal rim over which the withdrawn thread passes as it moves relative to the thread control member due to a reduction in the thread withdrawal tension.
Claim 2
Dependent Claim
349 words
In a thread supply device for a textile machine, in particular a knitting machine, said thread supply device including drum means upon which a thread can be tangentially wound to form an intermediate thread storage and from which the thread can be unwound axially over a withdrawal rim associated with the drum means, a thread control member positioned adjacent the withdrawal rim of said drum means for engaging the withdrawn thread to limit the withdrawal rate of thread from said drum means substantially to the rate at which thread is wound on the drum means to thereby provide a positive thread supply, and a thread guide assembly disposed in substantial alignment with the longitudinal axis of said drum means for guiding the thread withdrawn from said drum means after it passes over the withdrawal rim, the thread guide assembly including a first thread guide element aligned with the axis of said drum means and disposed in engagement with the withdrawn thread, the thread guide assembly including a second thread guide element disposed adjacent the first thread guide element and means mounting the second thread guide element for pivotal movement substantially transversely relative to the thread passage therepast, the second thread guide element being substantially coaxially aligned with the axis of said drum means during positive thread supply, and spring means coacting with said second thread guide element for urging same transversely away from its position of alignment with the axis of said drum means, comprising the improvement wherein the withdrawn thread after passing over the withdrawal rim and the thread control member is supplied directly to the second thread guide element, said second thread guide element engaging the thread as withdrawn from the drum means prior to engagement thereof by any other part of the thread guide assembly, and said spring means normally swingably urging said second thread guide element outwardly toward an area which is substantially aligned with a part of the withdrawal rim over which the withdrawn thread passes as it moves relative to the thread control member due to a reduction in the thread withdrawal tension.
Claim 3
Dependent Claim
39 words
A device according to claim 1, wherein said second thread guide element is mounted for pivotal movement about an axis which is substantially parallel to the axis of said drum means but is spaced outwardly from the withdrawal rim.
Claim 4
Dependent Claim
17 words
A device according to claim 1, wherein said drum means is mounted for rotation about said axis.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |