US3844100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the open-end spinning of textile yarns
Assignee: Hollingsworth UK Ltd
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Filing: 1972-10-18
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Granted: 1974-10-29
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Expires: 1992-10-18
Abstract
Abstract Open-end spinning apparatus in which twisted yarn is formed by continuously depositing discrete fibers on a fiber collecting surface of a spinning rotor, continuously removing them from the surface to form the tail end of a yarn and drawing off the continuously formed twisted yarn, said spinning rotor having an inner surface which is concentric with respect to the rotary axis of the rotor and which has two portions converging toward a region of maximum diameter at which said fiber collecting surface is located and said apparatus further comprising a yarn delivery tube extending from a yarn outlet end across a plane in which lie the points of maximum diameter of the fiber collecting surface and terminating at a yarn inlet end within the spinning rotor, said yarn delivery tube being provided at said yarn inlet end with a flange having a surface which extends outwardly and back toward said fiber collecting surface to form a guide surface for fibers being spun into yarn while being withdrawn from the fiber collecting surface, and a rear surface opposite said front guide surface and confronting said closure surface and said fiber feed duct exit opening.
Inventors
- 👤 F Croasdale
- 👤 M English
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:05
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/40
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
218 words
Open-end spinning apparatus comprising: a spinning rotor having an open end and an inner surface which is concentric with respect to the rotary axis of the rotor and which has two portions coverging toward a region of maximum diameter to form a fiber collecting surface, a closure member for closing the open end of the rotor and having a closure surface in the region of the open end of the spinning rotor, a fiber feed duct passing through said closure member for feeding fibers in discrete form to said rotor and having an exit opening in said closure surface, and a yarn delivery tube passing through said closure member, extending from a yarn outlet end through the open end of the rotor and across a plane in which lie the points of maximum diameter of the fiber collecting surface and terminating at a yarn inlet end within the spinning rotor, said yarn delivery tube having a flange portion provided at said yarn inlet end, said flange portion having a front guide surface which extends outwardly and back toward the fiber collecting surface to guide fibers being spun into yarn while being withdrawn from the fiber collecting surface and a rear surface opposite said front guide surface and confronting said closure surface and said fiber feed duct exit opening.
Claim 2
Dependent Claim
218 words
Open-end spinning apparatus comprising: a spinning rotor having an open end and an inner surface which is concentric with respect to the rotary axis of the rotor and which has two portions coverging toward a region of maximum diameter to form a fiber collecting surface, a closure member for closing the open end of the rotor and having a closure surface in the region of the open end of the spinning rotor, a fiber feed duct passing through said closure member for feeding fibers in discrete form to said rotor and having an exit opening in said closure surface, and a yarn delivery tube passing through said closure member, extending from a yarn outlet end through the open end of the rotor and across a plane in which lie the points of maximum diameter of the fiber collecting surface and terminating at a yarn inlet end within the spinning rotor, said yarn delivery tube having a flange portion provided at said yarn inlet end, said flange portion having a front guide surface which extends outwardly and back toward the fiber collecting surface to guide fibers being spun into yarn while being withdrawn from the fiber collecting surface and a rear surface opposite said front guide surface and confronting said closure surface and said fiber feed duct exit opening.
Claim 3
Dependent Claim
20 words
Apparatus according to claim 1, wherein the yarn delivery tube is coaxial with the rotary axis of the spinning rotor.
Claim 4
Dependent Claim
33 words
Apparatus according to claim 2, wherein the front guide surface, over a predetermined portion at least thereof, is spaced from the inner surface of the rotor adjacent thereto by a substantially constant gap.
Claim 5
Dependent Claim
19 words
Apparatus according to claim 3, wherein the front guide surface is of frusto-conical form over said predetermined portion thereof.
Claim 6
Dependent Claim
26 words
Apparatus according to claim 2, wherein the yarn delivery tube at the yarn inlet end has a flared throat portion leading to said front guide surface.
Claim 7
Dependent Claim
16 words
Apparatus according to claim 5, wherein the throat portion is provided with a plurality of grooves.
Claim 8
Dependent Claim
18 words
Apparatus according to claim 2, wherein said fibre collecting surface is formed by a localised fibre collecting groove.
Claim 9
Dependent Claim
86 words
Apparatus according to claim 7, wherein the said two portions of the inner surface of the rotor comprise a frusto-conical first portion extending away from one end of the rotor and outwardly from the rotary axis of the rotor and a frusto-conical second portion extending away from the other end of the rotor and outwardly from the rotary axis of the rotor and wherein the frusto-conical first and second portions converge to said region of maximum diameter at which said localised fibre collecting groove is formed.
Claim 10
Dependent Claim
29 words
Apparatus according to claim 2, wherein the said rear surface of the flange portion and said front guide surface converge to form a circular edge of the flange portion.
Claim 11
Dependent Claim
39 words
Apparatus according to claim 9, wherein the said circular edge lies in a plane closer to the open end of the spinning rotor than the plane in which lie the points of maximum diameter of the fibre collecting surface.
Claim 12
Dependent Claim
31 words
Apparatus according to claim 2, wherein the said rear surface of the flange portion is of frusto-conical form, extending forwardly and radially outwardly from the rotor axis of the spinning rotor.
Claim 13
Dependent Claim
24 words
Apparatus according to claim 11, wherein said closure surface is of frusto-conical form and parallel to the frusto-conical rear sUrface of the flange portion.
Claim 14
Dependent Claim
27 words
Apparatus according to claim 11, wherein said closure surface is flat and lies in a plane at right angles to the rotary axis of the spinning rotor.
Claim 15
Dependent Claim
27 words
Apparatus according to claim 2, wherein said rear surface of the flange portion and the said closure surface are such as to provide therebetween a constant gap.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |