Patent US3761559A successfully refreshed from Google Patents.
US3761559A
Expired / Lapsed
US
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Opposed flow spinneret blanketer
Assignee: EIDP Inc
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Filing: 1972-04-24
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Granted: 1973-09-25
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Expires: 1992-04-24
Abstract
Abstract A spinneret blanketer in which heated inert gas is passed through a spinning pack to two channels which direct opposed inert gas streams across the spinneret face. The channels are bounded on their upper side by the spinneret face and on the lower side by a spinneret retainer having a lip whose lower face forms an angle of less than 45* to the spinneret face. The lip serves to deflect the normally present current of upward flowing ambient air so that it flows at an angle of less than 45* to the spinneret face where it approaches the inert gas stream. Preferably, the opposed inert gas streams are of unequal velocities so that the streams will meet at a front remote from the filaments.
Inventors
- 👤 R Heckrotte
- 👤 J Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:52
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/08; D01D4/00; D01D4/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
130 words
In a process for melt-spinning filaments including the steps of extruding filaments through orifices in the face of a spinneret plate and introducing a flow of inert gas across and in contact with the face of the spinneret to exclude ambient air, said air having upward velocity components, said components being generally normal to the face of the spinneret, the improvement comprising: introducing said flow of inert gas as two opposed streams across the face of the spinneret, said streams having unequal velocities, only one of said opposed streams passing through said filaments, both streams meeting at a location remote from said filaments; and directing said upward velocity components to approach the inert gas flow in the same direction at an angle of less than 45* to the spinneret face.
Claim 2
Dependent Claim
130 words
In a process for melt-spinning filaments including the steps of extruding filaments through orifices in the face of a spinneret plate and introducing a flow of inert gas across and in contact with the face of the spinneret to exclude ambient air, said air having upward velocity components, said components being generally normal to the face of the spinneret, the improvement comprising: introducing said flow of inert gas as two opposed streams across the face of the spinneret, said streams having unequal velocities, only one of said opposed streams passing through said filaments, both streams meeting at a location remote from said filaments; and directing said upward velocity components to approach the inert gas flow in the same direction at an angle of less than 45* to the spinneret face.
Claim 3
Dependent Claim
26 words
The process as defined in claim 1, said components being directed to flow in the same direction and substantially parallel to said flow of inert gas.
References Cited (Backward Citations)
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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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |