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Patent US4394107A successfully refreshed from Google Patents.
US3869852A
Expired / Lapsed
US
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Method of and apparatus for twisting yarn
Assignee: Die Evolution SA
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Filing: 1974-02-22
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Granted: 1975-03-11
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Expires: 1994-02-22
Abstract
Abstract A yarn bobbin or package is rotated at high speed about an axis and the air immediately surrounding the bobbin is confined with an open-ended tube that is rotated with the yarn bobbin and projects beyond the yarn bobbin. This tube forms a vortex of air at its open end which has a velocity which decreases axially away from the package. The yarn is pulled off the bobbin toward this open end and passed through an eye axially spaced from the yarn bobbin so that this yarn is guided through the vortex to form a balloon. The air currents in the vortex brake the thread. The eye can be mounted well above the assembly, or can be provided in a recess in an insert received in the top of the yarn package. Offsetting this eye to the rotation axis of the yarn body causes a tension vibration to be formed in the yarn that prevents the snapping of the yarn during twisting thereof.
Inventors
- 👤 Edmund Hamel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:55
CPC Classifications
D; D01; D01H; D01H1/00; D01H1/14; D01H1/42; D01H1/427; D01H1/003
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
91 words
A method of twisting a yarn comprising the steps of: rotating a yarn bobbin about an axis; confining the air immediately sourrounding said bobbin with an open-ended tube rotatable therewith about said axis and projecting therebeyond to generate a vortex of air at the open end of said tube with a velocity decreasing axially away from said package; and pulling a yarn off said bobbin and through an eye axially spaced therefrom and guiding said yarn through said vortex to form a balloon thereof in the confined air and said vortex.
Claim 2
Independent Claim
91 words
A method of twisting a yarn comprising the steps of: rotating a yarn bobbin about an axis; confining the air immediately sourrounding said bobbin with an open-ended tube rotatable therewith about said axis and projecting therebeyond to generate a vortex of air at the open end of said tube with a velocity decreasing axially away from said package; and pulling a yarn off said bobbin and through an eye axially spaced therefrom and guiding said yarn through said vortex to form a balloon thereof in the confined air and said vortex.
Claim 3
Dependent Claim
30 words
The method defined in claim 1, further comprising the step of periodically varying the radial component of the length of the section of yarn between said bobbin and said eye.
Claim 4
Independent Claim
83 words
A method of twisting a yarn comprising the steps of: rotating a yarn bobbin about an axis; confining the air immediately surrounding said bobbin with an open-ended tube rotatable therewith about said axis; pulling a yarn off said bobbin and through an eye axially spaced therefrom and at least adjacent said axis such that said yarn travels axially and radially from said bobbin to said eye; and periodically varying the radial component of travel of said yarn between said bobbin and said eye.
Claim 5
Independent Claim
83 words
A method of twisting a yarn comprising the steps of: rotating a yarn bobbin about an axis; confining the air immediately surrounding said bobbin with an open-ended tube rotatable therewith about said axis; pulling a yarn off said bobbin and through an eye axially spaced therefrom and at least adjacent said axis such that said yarn travels axially and radially from said bobbin to said eye; and periodically varying the radial component of travel of said yarn between said bobbin and said eye.
Claim 6
Dependent Claim
20 words
The method defined in claim 3 wherein said component is varied by positioning said eye fixedly eccentrically to said axis.
Claim 7
Independent Claim
131 words
An apparatus for twisting a yarn comprising: a spindle having a longitudinal axis and adapted to receive a yarn bobbin; a tuBe concentric with said axis and fixed on said spindle, said tube defining an axially extending space with said bobbin and having an axially open end projecting beyond said bobbin; means for rotating said spindle, said bobbin, and said tube about said axis and thereby generating a vortex of air at said open end of said tube and having a velocity decreasing axially away from said package; an eye axially spaced from said bobbin at said open end; and means for pulling a yarn off said bobbin and through said eye and guiding said yarn through said vortex to form a balloon thereof in said space and in said vortex.
Claim 8
Independent Claim
131 words
An apparatus for twisting a yarn comprising: a spindle having a longitudinal axis and adapted to receive a yarn bobbin; a tuBe concentric with said axis and fixed on said spindle, said tube defining an axially extending space with said bobbin and having an axially open end projecting beyond said bobbin; means for rotating said spindle, said bobbin, and said tube about said axis and thereby generating a vortex of air at said open end of said tube and having a velocity decreasing axially away from said package; an eye axially spaced from said bobbin at said open end; and means for pulling a yarn off said bobbin and through said eye and guiding said yarn through said vortex to form a balloon thereof in said space and in said vortex.
Claim 9
Independent Claim
131 words
An apparatus for twisting a yarn comprising: a spindle having a longitudinal axis and adapted to receive a yarn bobbin; a tuBe concentric with said axis and fixed on said spindle, said tube defining an axially extending space with said bobbin and having an axially open end projecting beyond said bobbin; means for rotating said spindle, said bobbin, and said tube about said axis and thereby generating a vortex of air at said open end of said tube and having a velocity decreasing axially away from said package; an eye axially spaced from said bobbin at said open end; and means for pulling a yarn off said bobbin and through said eye and guiding said yarn through said vortex to form a balloon thereof in said space and in said vortex.
Claim 10
Independent Claim
131 words
An apparatus for twisting a yarn comprising: a spindle having a longitudinal axis and adapted to receive a yarn bobbin; a tuBe concentric with said axis and fixed on said spindle, said tube defining an axially extending space with said bobbin and having an axially open end projecting beyond said bobbin; means for rotating said spindle, said bobbin, and said tube about said axis and thereby generating a vortex of air at said open end of said tube and having a velocity decreasing axially away from said package; an eye axially spaced from said bobbin at said open end; and means for pulling a yarn off said bobbin and through said eye and guiding said yarn through said vortex to form a balloon thereof in said space and in said vortex.
Claim 11
Dependent Claim
18 words
The apparatus defined in claim 5 wherein said eye is rotationally fixed relative to said tube and spindle.
Claim 12
Dependent Claim
14 words
The apparatus defined in claim 6 wherein said eye is offset from said axis.
Claim 13
Dependent Claim
26 words
The apparatus defined in claim 6 wherein said eye is displaceable along said axis, said apparatus further comprising means for clamping said eye along said axis.
Claim 14
Dependent Claim
37 words
The apparatus defined in claim 5, further comprising an end element secured to said spindle at said open end of said tube and defining with said tube an annular gap, said balloon being formed in said gap.
Claim 15
Dependent Claim
17 words
The apparatus defined in claim 9 wherein said element is a flat circular disk overlying said bobbin.
Claim 16
Dependent Claim
35 words
The apparatus defined in claim 9 wherein said element is formed with a surface of revolution centered on said axis and formed at said axis with a recess, said eye being located in said recess.
Claim 17
Dependent Claim
18 words
The apparatus defined in claim 11 wherein said eye is positioned in said recess offset from said axis.
Claim 18
Dependent Claim
21 words
The apparatus defined in claim 11 wherein said surface is curved in cross section corresponding to the shape of said balloon.
Claim 19
Dependent Claim
15 words
The apparatus defined in claim 11 wherein said surface is generally rectangular in cross section.
Claim 20
Dependent Claim
22 words
The apparatus defined in claim 5, further comprising means for displacing said open end of said tube axially relative to said bobbin.
Claim 21
Dependent Claim
47 words
The apparatus defined in claim 5 wherein said tube is formed of a main tube section and said means for displacing said end includes an insert collar carried on the end of said tube section and forming said open end, said collar being displaceable in said section.
Claim 22
Dependent Claim
19 words
The apparatus defined in claim 5, further comprising a fixed tube coaxial with the first-mentioned tube and surrounding same.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |