US4123208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry spinning pack assembly
Assignee: EIDP Inc
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Filing: 1977-03-31
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Granted: 1978-10-31
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Expires: 1997-03-31
Abstract
Abstract An improved apparatus for dry spinning of filaments adapted to minimize the occurrence of oversized filaments during spinning. The apparatus includes a spinning pack positioned in a chamber supplied with heated gas. The spinning pack includes a distribution plate provided with a plurality of radial passages for gas, each passage having an opening at one end located at the periphery of the pack and an opening at the other end located at the bottom of the pack at the center of the extruded filament bundle to distribute heated gas from the outer chamber to the center of the filament bundle.
Inventors
- 👤 Petrus Klaver
- 👤 Jacob G. Steenhof de Jong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:41
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
129 words
In an apparatus for spinning filaments that includes a spinning pack located in a chamber supplied with gas for impinging against and flowing through filaments extruded in a downward direction from the bottom surface of said spinning pack in concentric rings surrounding a central portion of said bottom surface, said spinning pack having a peripheral surface exposed to the gas in said chamber, the improvement comprising: a passage connecting said peripheral surface and said central portion of said bottom surface to provide a flow passage through said spinning pack for said gas, whereby a portion of the gas is aspirated from said chamber through said passage downwardly to the central portion of said bottom surface for impinging the innermost of said concentric rings as such filaments are being extruded.
Claim 2
Dependent Claim
129 words
In an apparatus for spinning filaments that includes a spinning pack located in a chamber supplied with gas for impinging against and flowing through filaments extruded in a downward direction from the bottom surface of said spinning pack in concentric rings surrounding a central portion of said bottom surface, said spinning pack having a peripheral surface exposed to the gas in said chamber, the improvement comprising: a passage connecting said peripheral surface and said central portion of said bottom surface to provide a flow passage through said spinning pack for said gas, whereby a portion of the gas is aspirated from said chamber through said passage downwardly to the central portion of said bottom surface for impinging the innermost of said concentric rings as such filaments are being extruded.
Claim 3
Dependent Claim
26 words
The apparatus as defined in claim 1, there being a plurality of said passages extending radially from a circular pattern of holes in said central portion.
Claim 4
Dependent Claim
12 words
The apparatus as defined in claim 2, said passages being equispaced radially.
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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |