US3608040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinneret with stream guide
Assignee: Monsanto Co
•
Filing: 1969-02-10
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Granted: 1971-09-21
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Expires: 1989-02-10
Abstract
Abstract A stream guide finger is mounted coaxially within a spinneret capillary and extends downwardly beyond the capillary discharge opening, reducing the tendency of the molten stream to flick, bend or drip.
Inventors
- 👤 John M Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:54
CPC Classifications
D; D01; D01D; D01D4/00; D01D4/02; D01D4/022
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
29 words
The apparatus defined in claim 1 wherein said orifice is right circularly cylindrical, and wherein said largest dimension is a diameter of the right circular cylinder defining said orifice.
Claim 2
Dependent Claim
18 words
The apparatus defined in claim 1, wherein said free end extends farther than two times said largest dimension.
Claim 3
Dependent Claim
17 words
The apparatus defined in claim 1 wherein the upper end of said orifice communicates with a counterbore.
Claim 4
Dependent Claim
22 words
The apparatus defined in claim 1, wherein said finger has a smaller cross section at said free end than at said orifice.
Claim 5
Independent Claim
125 words
A method of melt spinning a melt-spinnable molten fiber-forming polymer, comprising, A. extruding said molten polymer along an annular path between a spinneret orifice wall and a stream guide finger within and extending beyond the discharge end of said orifice; B. flowing said molten polymer along said guiding finger past the discharge end of said orifice; C. controlling gas flow in the vicinity of said finger to a velocity less than 20 ft. per second whereby said polymer flows from the end of said finger in a continuous stream devoid of a central cavity; D. cooling said continuous stream to a temperature below the melt point of said polymer, thereby forming a continuous solid filament; and E. collecting said continuous filament in an orderly fashion.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |