US3822541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open end spinning apparatus
Assignee: Hollingsworth UK Ltd
•
Filing: 1973-01-12
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Granted: 1974-07-09
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Expires: 1993-01-12
Abstract
Abstract An open end spinning apparatus comprises a hollow spinning rotor which is open at its upper end and closed at its lower end and which has an inner surface free from apertures and concentric with respect to the rotary axis of the rotor, said inner surface of the rotor having a rotor wall portion which extends from the open upper end of the rotor radially outwardly with respect to the rotor axis and downwardly to a region of maximum diameter at which region there is formed a localized fibre collecting circumferential groove, the diameter of the groove when measured from the base of the groove in a plane at right angles to the rotary axis of the rotor being at least eleven times greater than the height or mean height of said open upper end above the base of the fibre collecting groove when measured parallel to the axis of the spinning rotor. The lower end or base portion of the rotor may lie in a plane at right angles to the rotor axis or partly in such a plane and partly in a frusto-conical plane. The fibre collecting groove may lie above or below said base portion and may be of any of several radial sections.
Inventors
- 👤 F Croasdale
- 👤 R Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:17
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/04; D01H4/08; D01H4/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
149 words
Open end spinning apparatus comprising a hollow spinning rotor which is open at its upper end and closed at its lower end and which has an inner surface free from apertures and concentric with respect to the rotary axis of the rotor, said inner surface of the rotor having a rotor wall portion which extends from the open upper end of the rotor radially outwardly with respect to the rotor axis and downwardly to a region of maximum diameter at which region there is formed a localised fibre collecting circumferential groove, the diameter of the groove when measured from the base of the groove in a plane at right angles to the rotary axis of the rotor being at least eleven times greater thaN the height of said open upper end above the base of the fibre collecting groove when measured parallel to the axis of the spinning rotor.
Claim 2
Dependent Claim
149 words
Open end spinning apparatus comprising a hollow spinning rotor which is open at its upper end and closed at its lower end and which has an inner surface free from apertures and concentric with respect to the rotary axis of the rotor, said inner surface of the rotor having a rotor wall portion which extends from the open upper end of the rotor radially outwardly with respect to the rotor axis and downwardly to a region of maximum diameter at which region there is formed a localised fibre collecting circumferential groove, the diameter of the groove when measured from the base of the groove in a plane at right angles to the rotary axis of the rotor being at least eleven times greater thaN the height of said open upper end above the base of the fibre collecting groove when measured parallel to the axis of the spinning rotor.
Claim 3
Dependent Claim
32 words
Apparatus according to claim 1, wherein the said diameter is in the region of 13 to 16 times the height of said open end above the base of the fibre collecting groove.
Claim 4
Dependent Claim
78 words
Apparatus according to claim 2, wherein said groove is formed with a groove base portion, a groove upper wall portion extending to the groove base portion and a groove lower wall portion extending to the groove base portion, wherein the rotor upper wall portion and said groove upper wall portion lie in the same frusto-conical surface and wherein the groove lower wall portion lies in a frusto-conical surface and extends outwardly and downwardly to the groove base portion.
Claim 5
Dependent Claim
40 words
Apparatus according to claim 3, wherein the rotor base portion extends to the groove lower wall portion in a plane at right angles to the axis of the rotor to produce an abrupt change of slope at the junction thereof.
Claim 6
Dependent Claim
84 words
Apparatus according to claim 1, wherein said groove is formed with a groove base portion, a groove upper wall portion extending to the groove base portion and a groove lower wall portion extending to the groove base portion, the groove upper wall portion and the groove lower wall portion converging to the said groove base portion, and the rotor upper wall portion and the groove upper wall portion lying in different frusto-conical surfaces to produce an abrupt change of slope at the junction thereof.
Claim 7
Dependent Claim
101 words
Apparatus according to claim 1, wherein said groove is formed with a groove base portion, a groove upper wall portion extending to the groove base portion and a groove lower wall portion extending to the groove base portion, the groove upper wall portion and the groove lower wall portion converging to the said groove base portion, the rotor base portion in the region of said groove and the groove lower wall portion lying in the same frusto-conical surface and the rotor base portion in the region of the rotor axis lying in a plane at right angles to the rotor axis.
Claim 8
Dependent Claim
61 words
Apparatus according to claim 1, wherein said groove is formed with a groove base portion, a groove upper wall portion extending to the groove base portion, the groove base portion lying in a cylindrical surface coaxial with the axis of the rotor and the groove upper and lower wall portions lying in spaced planes at right angles to the rotor axis.
Claim 9
Dependent Claim
70 words
Apparatus according to claim 1, wherein said groove is formed with a groove base portion, a groove upper wall portion extending to the groove base portion and a groove lower wall portion extending to the groove base portion, the groove upper wall portion and the groove lower wall portion converging to the said groove base portion, and wherein the angle between the groove upper and lower wall portions is 30*.
Claim 10
Dependent Claim
59 words
Apparatus according to claim 8 wherein the groove upper wall portion is inclined above and the groove lower wall portion is inclined below a plane at right angles to the rotary axis of the rotor and passing through the groove base portion, and wherein the angle between the groove lower wall portion and said plane does not exceed 15*.
Claim 11
Dependent Claim
19 words
Apparatus according to claim 9 wherein the angle between the groove lower wall portion and said plane is 10*.
Claim 12
Dependent Claim
198 words
Open end spinning apparatus comprising a hollow spinning rotor which is open at its upper end and closed at its lower end and which has an inner surface free from apertures and concentric with respect to the rotary axis of the rotor, said inner surface of the rotor having a rotor wall portion which extends from the open upper end of the rotor radially outwardly with respect to the rotor axis and downwardly to a region of maximum diameter at which region there is formed a localized fibre collecting circumferential groove, the diameter of the groove when measured from the base of the groove in a plane at right angles to the rotary axis of the rotor being at lEast eleven times greater than the height of said open upper end above the base of the fibre collecting groove when measured parallel to the axis of the spinning rotor and the ratio of the maximum distance between said rotor base portion and the said open end when measured parallel to the axis of the rotor to the said height of the open end above the base of the fibre collecting groove being not greater than 1 : 1.6.
Claim 13
Dependent Claim
198 words
Open end spinning apparatus comprising a hollow spinning rotor which is open at its upper end and closed at its lower end and which has an inner surface free from apertures and concentric with respect to the rotary axis of the rotor, said inner surface of the rotor having a rotor wall portion which extends from the open upper end of the rotor radially outwardly with respect to the rotor axis and downwardly to a region of maximum diameter at which region there is formed a localized fibre collecting circumferential groove, the diameter of the groove when measured from the base of the groove in a plane at right angles to the rotary axis of the rotor being at lEast eleven times greater than the height of said open upper end above the base of the fibre collecting groove when measured parallel to the axis of the spinning rotor and the ratio of the maximum distance between said rotor base portion and the said open end when measured parallel to the axis of the rotor to the said height of the open end above the base of the fibre collecting groove being not greater than 1 : 1.6.
Claim 14
Dependent Claim
13 words
Apparatus according to claim 11, wherein the said ratio is 1 : 1.4.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |