Patent US5495188A successfully refreshed from Google Patents.
Patent US4251200A successfully refreshed from Google Patents.
US4251200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for spinning bicomponent filaments
Assignee: Imperial Chemical Industries Ltd
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Filing: 1979-11-23
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Granted: 1981-02-17
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Expires: 1999-11-23
Abstract
Abstract A spinning assembly for use in a process for the production of sheath/core bicomponent fibres comprising a spinneret plate having at least one counter-bore terminating in an extrusion orifice, a distributor plate spaced apart from but facing the spinneret plate to provide a liquid channel therebetween for communication with a source of sheath-forming material, the distributor plate being provided with an aperture opposite each orifice in the spinneret plate for communication with a source of core-forming material and a plateau-like protrusion on the distributor plate extending about the axis common to the aperture and the extrusion orifice characterised in that there is provided an orifice plate for restricting the entrance to the counter-bore.
Inventors
- 👤 Paul C. Parkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:48
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; D01D5/34; Y; Y10; Y10S; Y10S264/00; Y10S264/26; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
131 words
A spinning assembly for the production of sheath/core bicomponent fibres, comprising a spinneret plate having at least one counter-bore terminating in an extrusion orifice, a distributor plate spaced apart from but facing the spinneret plate to provide a liquid channel there-between for communication with a source of sheath-forming material, the distributor plate being provided with an aperture opposite each orifice in the spinneret plate and which communicates with a source of core-forming material, and a plateau-like protrusion extending about the axis common to the aperture of the distributor plate and the extrusion orifice of the spinneret plate to constrict the liquid channel in a region surrounding the entrance to the counter-bore of the extrusion orifice the improvement being that there is provided a means of restricting the entrance to the counter-bore.
Claim 2
Dependent Claim
131 words
A spinning assembly for the production of sheath/core bicomponent fibres, comprising a spinneret plate having at least one counter-bore terminating in an extrusion orifice, a distributor plate spaced apart from but facing the spinneret plate to provide a liquid channel there-between for communication with a source of sheath-forming material, the distributor plate being provided with an aperture opposite each orifice in the spinneret plate and which communicates with a source of core-forming material, and a plateau-like protrusion extending about the axis common to the aperture of the distributor plate and the extrusion orifice of the spinneret plate to constrict the liquid channel in a region surrounding the entrance to the counter-bore of the extrusion orifice the improvement being that there is provided a means of restricting the entrance to the counter-bore.
Claim 3
Dependent Claim
56 words
A spinning assembly as claimed in claim 1 in which the means of restricting the entrance to the counter-bore of the extrusion orifice is an orifice plate, the orifice plate having an orifice which has an axis common with that of the aperture of the distributor plate and of the extrusion orifice of the spinneret plate.
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) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |