US3799212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yarn feeding device for textile machines
Assignee: Zbrojovka Vsetin np
•
Filing: 1972-07-12
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Granted: 1974-03-26
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Expires: 1992-07-12
Abstract
Abstract A device for feeding yarns in textile machines, particularly for weft measuring devices in looms with hydraulic or pneumatic weft insertion. The device includes two rotary bodies, one rotary body being constituted by a ring provided with an inner frictional surface and an outer frictional surface, the ring being mounted on a rotary conical driving body. The other rotary body is a yarn pressing disc, the axis of rotation of which is parallel to the axis of rotation of the rotary conical driving body. The ring and the pressing disc form a yarn-forwarding nip between them. The ring and the conical rotary driving body constitute a frictional pair of which at least one member is axially traversable with respect to the other member of said frictional pair.
Inventors
- 👤 S Krmela
- 👤 L Klinecky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:03
CPC Classifications
D; D03; D03D; D03D47/00; D03D47/34; D03D47/36; D03D47/368
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
158 words
A device for feeding yarns in textile machines, comprising two rotary bodies which cooperate to form a yarn feeding means, one rotary body comprising a ring provided with an inner frictional surface and an outer frictional surface, a rotary driving body of revolution which has a diameter which increases continuously from a minimum to the maximum diameter, the ring fitting over the rotary driving body and being rotational by contact of at least a part of its inner frictional surface with the surface of the rotary driving body, the other rotary body being at least one pressing disc, the axis of rotaTion thereof being parallel to the axis of rotation of the rotary driving body, the ring and the rotary driving body constituting a frictional driving pair of members of which at least one member is axially traversable with respect to the other member of said frictional pair, whereby to vary the speed of the yarn fed thereby.
Claim 2
Independent Claim
158 words
A device for feeding yarns in textile machines, comprising two rotary bodies which cooperate to form a yarn feeding means, one rotary body comprising a ring provided with an inner frictional surface and an outer frictional surface, a rotary driving body of revolution which has a diameter which increases continuously from a minimum to the maximum diameter, the ring fitting over the rotary driving body and being rotational by contact of at least a part of its inner frictional surface with the surface of the rotary driving body, the other rotary body being at least one pressing disc, the axis of rotaTion thereof being parallel to the axis of rotation of the rotary driving body, the ring and the rotary driving body constituting a frictional driving pair of members of which at least one member is axially traversable with respect to the other member of said frictional pair, whereby to vary the speed of the yarn fed thereby.
Claim 3
Dependent Claim
16 words
A device as claimed in claim 1, wherein the rotary driving body is a truncated cone.
Claim 4
Dependent Claim
46 words
A device as claimed in claim 1, comprising a support, means rotatably mounting the pressing disc on the support, the pressing disc being selectively movable away from the ring, and at least one pressing means on said support for urging the pressing disc towards the ring.
Claim 5
Dependent Claim
20 words
A device as claimed in claim 3, wherein the support is provided with a fork for axially traversing the ring.
Claim 6
Dependent Claim
16 words
A device as claimed in claim 3, comprising at least one yarn guide on the support.
Claim 7
Dependent Claim
41 words
A device as claimed in claim 3, comprising a stationary guideway, means mounting the support for adjustment along said guideway, and wherein the driving body is axially stationary, and the guideway is parallel to the axis of the rotary driving body.
Claim 8
Dependent Claim
27 words
A device as claimed in claim 3, wherein the support is provided with at least one swingable supporting arm on which the pressing disc is rotatably mounted.
Claim 9
Dependent Claim
24 words
A device as claimed in claim 7, wherein the pressing means is constituted by a spring arranged between the supporting arm and its support.
Claim 10
Dependent Claim
25 words
A device as claimed in claim 3, wherein the support is provided with a gate, in which there are guided pins on the pressure disc.
Claim 11
Dependent Claim
28 words
A device as claimed in claim 9, wherein the pressing means is a spring arranged on a support for acting with force upon pins of the pressing disc.
Claim 12
Dependent Claim
63 words
A device as claimed in claim 3, wherein the support comprises an annular sleeve mounted contactlessly on the rotary driving body and fastneed to a pressing arm swingably mounted on a stationary support, and the annular sleeve is immovably connected to an inner ring of a ball bearing on which an outer ring of a ball bearing carrying the ring is rotatably mounted.
Claim 13
Dependent Claim
36 words
A device as claimed in claim 11, wherein the ring is constituted by a straight cylindrical sleeve housing which passes over into a unilateral radial flange with an inner friction surface engaging the rotary driving body.
Claim 14
Dependent Claim
26 words
A device as claimed in claim 11, wherein the pressing arm is spring loaded for securing frictional engagement between the ring and the rotary driving body.
Claim 15
Dependent Claim
33 words
Adevice as claimed in claim 1, comprising means mounting the pressing disc in axially immovable position, and means mounting the rotary driving body for adjustment axially with respect to the axially immovable disc.
Claim 16
Dependent Claim
53 words
A device as claimed in claim 14, wherein the rotary driving body is traversably mounted on a driving shaft and is movably connected with said shaft on one side, and is connected with a control member for adjusting the position of the rotary driving body on the driving shaft on the other side.
Claim 17
Dependent Claim
32 words
A device as claimed in claim 15, wherein the control member is constituted by a screw with an entrained yoke which engages a groove in the hub of the rotary driving body.
Claim 18
Dependent Claim
23 words
A device as claimed in claim 1, wherein at least one of the pair of rotary members is provided with a frictional coating.
Claim 19
Dependent Claim
33 words
A device as claimed in claim 1, wherein at least one of the pair of rotary bodies is provided with a circumferential groove in which the other body of said pair is guided.
Claim 20
Dependent Claim
64 words
A device as claimed in claim 1, wherein one of the pair of rotary bodies has a circumferential groove dividing the nip line into two partial nip lines, said groove being engaged by a radial collar mounted on the other rotary body of said pair, and a pair of independently controllable yarn guides for selectively introducing yarn into either of the partial nip lines.
Claim 21
Dependent Claim
18 words
A device as claimed in claim 1, wherein there are at least two pressing discs for each ring.
Claim 22
Dependent Claim
24 words
A device as claimed in claim 20, wherein each support arm has a control mechanism for moving the pressing disc away from the ring.
Claim 23
Dependent Claim
14 words
A device as claimed in claim 21, wherein the control mechanism is an electromagnet.
Claim 24
Dependent Claim
32 words
A device as claimed in claim 20, wherein between the ring and the pressing disc there is arranged at least unilaterally a taper for introducing yarn between the said two rotary bodies.
Claim 25
Dependent Claim
21 words
A device as claimed in claim 2, wherein the ring and the presser disc form a yarn feeding nip between them.
Claim 26
Dependent Claim
82 words
A device as claimed in claim 1, wherein the yarn is wrapped at least once around the ring, the ring is provided with a circumferential groove, the ring is guided inside a circumferential groove in the pressing disc, and a guiding comb cooperating with the ring for spreading the wraps of yarn around the ring, the comb being mounted in front of a gap in the ring for the free passage of yarn, mounted between the ring and the rotary driving body.
References Cited (Backward Citations)
US3596683A
Cited
US3552622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |