US3650104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinning of textile yarns
Assignee: Hollingsworth UK Ltd
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Filing: 1969-07-18
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Granted: 1972-03-21
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Expires: 1989-07-18
Abstract
Abstract A method of and apparatus for the open end spinning of textile yarns from continuous filaments in which a filament or tow of filaments is continuously advanced to a severing station where the filament or tow is severed into fibers of staple length. The staple fibers so formed at the severing station are conveyed in discrete manner to an internal fiber collecting surface of a spinning rotor from which they are continuously removed to form the tail-end of a yarn which is continuously drawn off from the rotor.
Inventors
- 👤 John Michael Shepherd
- 👤 Robert Greenwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:46
CPC Classifications
D; D01; D01G; D01G1/00; D01G1/06; D01G1/10; D01H; D01H4/00; D01H4/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
97 words
A method of open end spinning of textile yarns, comprising the steps of continuously advancing a filament or tow of filaments to a severing station, continuously severing the filament or tow of filaments into fibers of staple length at the severing station, continuously subjecting the fibers of staple length to an opening operation and then continuously conveying the fibers in discrete manner to an internal fiber collecting surface of a spinning rotor, continuously removing the fibers from the fiber collecting surface to form the tail end of a yarn, and drawing off the continuously formed twisted yarn.
Claim 2
Independent Claim
97 words
A method of open end spinning of textile yarns, comprising the steps of continuously advancing a filament or tow of filaments to a severing station, continuously severing the filament or tow of filaments into fibers of staple length at the severing station, continuously subjecting the fibers of staple length to an opening operation and then continuously conveying the fibers in discrete manner to an internal fiber collecting surface of a spinning rotor, continuously removing the fibers from the fiber collecting surface to form the tail end of a yarn, and drawing off the continuously formed twisted yarn.
Claim 3
Dependent Claim
18 words
A method according to claim 1, wherein the filaments or tow of filaments is severed by cutting them.
Claim 4
Dependent Claim
26 words
A method according to claim 1, wherein the severing of the filament or tow of filaments into fibers of staple length is effected by stretch-breaking it.
Claim 5
Dependent Claim
26 words
A method according to claim 1, wherein the fibers are opened in said opening operation by subjecting them to high draft in a roller drafting zone.
Claim 6
Dependent Claim
26 words
A method according to claim 1, wherein the fibers of staple length are delivered to the fiber collecting surface of the spinning rotor in an airstream.
Claim 7
Dependent Claim
123 words
Apparatus for the open end spinning of textile yarns comprising a spinning rotor haviNg an internal fiber collecting surface, fiber supply means for continuously supplying discrete fibers to the fiber collecting surface, and yarn drawoff means for drawing off yarn formed by the continuous removal of the fibers from the collecting surface, said fiber supply means including severing means, filament forwarding means for continuously forwarding a filament or tow of filaments to the severing means which continuously severs the filament or tow to produce fibers of staple length, and conveying means for continuously conveying the severed fibers in discrete manner to the fiber collecting surface of the spinning rotor and including opening means for continuously opening the fibers severed by the severing means.
Claim 8
Dependent Claim
123 words
Apparatus for the open end spinning of textile yarns comprising a spinning rotor haviNg an internal fiber collecting surface, fiber supply means for continuously supplying discrete fibers to the fiber collecting surface, and yarn drawoff means for drawing off yarn formed by the continuous removal of the fibers from the collecting surface, said fiber supply means including severing means, filament forwarding means for continuously forwarding a filament or tow of filaments to the severing means which continuously severs the filament or tow to produce fibers of staple length, and conveying means for continuously conveying the severed fibers in discrete manner to the fiber collecting surface of the spinning rotor and including opening means for continuously opening the fibers severed by the severing means.
Claim 9
Dependent Claim
27 words
A machine according to claim 6, wherein said severing means comprises a cutting device which cuts the filament or tow of filaments into fibers of staple length.
Claim 10
Dependent Claim
39 words
A machine according to claim 7, wherein the said cutting device comprises a rotary cutter provided with helical blades which cooperate with a stationary anvil to cut the continuous filament or tow of filaments into fibers of staple length.
Claim 11
Dependent Claim
15 words
A machine according to claim 6, wherein the severing means comprises a stretch-break drafting zone.
Claim 12
Dependent Claim
58 words
A machine according to claim 9, wherein said drafting zone is formed by first and second pairs of rollers through which the filament or tow of filaments is successively passed, with the second pair of rollers running at a sufficiently higher speed than the first pair of rollers to stretch-break the filament or tow of filaments drafted therein.
Claim 13
Dependent Claim
20 words
A machine according to claim 6, wherein said opening means comprises a rotary beater provided with saw tooth wire clothing.
Claim 14
Dependent Claim
17 words
A machine according to claim 6, wherein said opening means comprises a high draft roller drafting zone.
Claim 15
Dependent Claim
33 words
A machine according to claim 6, wherein the conveying means includes a fiber feed duct through which the fibers are conveyed to the fiber collecting surface of said spinning rotor in an airstream.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |