Patent US3787162A successfully refreshed from Google Patents.
US3787162A
Expired / Lapsed
US
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Conjugate filaments apparatus
Assignee: Imperial Chemical Industries Ltd
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Filing: 1972-04-13
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Granted: 1974-01-22
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Expires: 1992-04-13
Abstract
Abstract Process and apparatus for sheath/core conjugate filaments in which a jet of a first fiber-forming polymer is forced into confined space, second fibre-forming polymer is forced around first polymer from one side and polymers are extruded to form filaments. Preferably the ducts for first and second polymers are formed in part by appropriate apertures in metal shims.
Inventors
- 👤 J Cheetham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:58
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; D01D5/34; D01D4/00; D01D4/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
An apparatus for spinning a plurality of eccentric sheath/core conjugate filaments comprising a spinneret plate having a plurality of spinning orifices each with its own confined space, separated from an orifice plate bearing an orifice for each spinning orifice, by a first metal shim, and the orifice plate is separated from a pack body by a second metal shim, said spinneret plate being urged towards said pack body so as to compress said shims and the orifice plate into good contact with each other and with said spinneret plate and said pack body, said shims and said orifice plate having appropriate apertures cut through their thickness in order to form when assembled the desired distributive ducts for each of the polymeric constituents to each of the confined spaces.
Claim 2
Independent Claim
128 words
An apparatus for spinning a plurality of eccentric sheath/core conjugate filaments comprising a spinneret plate having a plurality of spinning orifices each with its own confined space, separated from an orifice plate bearing an orifice for each spinning orifice, by a first metal shim, and the orifice plate is separated from a pack body by a second metal shim, said spinneret plate being urged towards said pack body so as to compress said shims and the orifice plate into good contact with each other and with said spinneret plate and said pack body, said shims and said orifice plate having appropriate apertures cut through their thickness in order to form when assembled the desired distributive ducts for each of the polymeric constituents to each of the confined spaces.
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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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |