US3656290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curling sleeve
Assignee: Spinner Oy
•
Filing: 1970-03-31
•
Granted: 1972-04-18
•
Expires: 1990-03-31
Abstract
Abstract A curling sleeve for producing false twist on thermoplastic filament passed through the sleeve, the latter having friction rings at one or both ends, and the sleeve constituting the rotor of an electric motor.
Inventors
- 👤 Pekka Kuussaari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:50
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
A curling sleeve for producing false twist in a thermoplastic filament passed through the sleeve, said sleeve comprising a rotor body constituted as the rotor of an electric motor, said rotor body having opposite ends and friction rings at said ends, a fixed body, and bearing means for the rotor body supported by the fixed body, said bearing means comprising a plurality of rollers at each of the end of the rotor body, and journals supported by the fixed body and connecting the rollers at the two ends in pairs.
Claim 2
Dependent Claim
90 words
A curling sleeve for producing false twist in a thermoplastic filament passed through the sleeve, said sleeve comprising a rotor body constituted as the rotor of an electric motor, said rotor body having opposite ends and friction rings at said ends, a fixed body, and bearing means for the rotor body supported by the fixed body, said bearing means comprising a plurality of rollers at each of the end of the rotor body, and journals supported by the fixed body and connecting the rollers at the two ends in pairs.
Claim 3
Dependent Claim
24 words
A sleeve as claimed in claim 1 wherein three pairs of rollers are provided and disposed around the rotor body in peripheral contact therewith.
Claim 4
Dependent Claim
22 words
A sleeve as claimed in claim 1 wherein said rotor body is a one-piece member serving as the rotor of said motor.
Claim 5
Dependent Claim
19 words
A sleeve as claimed in claim 1 comprising tubes secured to said fixed body and rotatably receiving said journals.
Claim 6
Dependent Claim
30 words
A sleeve as claimed in claim 1 wherein said motor has a stator confined laterally between the pairs of rollers and confined radially between the rotor body and the journals.
References Cited (Backward Citations)
US2571267A
Cited
US2936570A
Cited
US3066473A
Cited
CH378458A
Cited
US3233398A
Cited
US3537250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |