Patent US3905381A successfully refreshed from Google Patents.
US3905381A
Expired / Lapsed
US
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Filament liquid quenching apparatus
Assignee: Phillips Petroleum Co
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Filing: 1973-09-07
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Granted: 1975-09-16
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Expires: 1993-09-07
Abstract
Abstract Melt-spun thermoplastic filaments are liquid quenched in an apparatus equipped with baffles for quieting the surface of said quenching liquid and a weir for maintaining a constant level of quenching liquid. The liquid is removed from said filaments by an apparatus containing an enclosed chamber which is partially defined by a perforated surface over which said filaments pass in contact therewith, said chamber being in communication with means for removing fluids therefrom.
Inventors
- 👤 Richard D Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:42
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/08; D01D5/088; D01D5/0885; D01D10/00; D01D10/04; D01D10/0436
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
Apparatus for liquid quenching melt-spun thermoplastic filaments comprising: a tank for storing a quench liquid; at least one baffle in said quench tank to dampen the movement of quench liquid wherein said baffle contains an opening through which said filaments pass and a perforated area to permit circulation of said quench liquid but which reduces turbulence of said quench liquid; a means for guiding said filaments through said tank; and a weir to control the level of quench liquid in said tank.
Claim 2
Dependent Claim
82 words
Apparatus for liquid quenching melt-spun thermoplastic filaments comprising: a tank for storing a quench liquid; at least one baffle in said quench tank to dampen the movement of quench liquid wherein said baffle contains an opening through which said filaments pass and a perforated area to permit circulation of said quench liquid but which reduces turbulence of said quench liquid; a means for guiding said filaments through said tank; and a weir to control the level of quench liquid in said tank.
Claim 3
Dependent Claim
35 words
The apparatus of claim 1 wherein at least two baffles are provided and the perforations in said baffles are progressively smaller in baffles progressively nearer to the area where the filaments enter the quench liquid.
Claim 4
Dependent Claim
17 words
The apparatus of claim 2 wherein said weir is located in a quiescent area of the tank.
Claim 5
Dependent Claim
25 words
The apparatus to claim 3 wherein the weir is adjustable in order to raise or lower the level of the quench liquid in the tank.
Claim 6
Dependent Claim
43 words
The apparatus of claim 3 wherein said weir has a vertical cylindrical wall and has notches in the upper rim of the wall in the range of 1/16 to 1/2 inch wide, 1/16 to 1/2 inch deep and 1/2 to 3 inches apart.
References Cited (Backward Citations)
US1239601A
Cited
US2494468A
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US2955017A
Cited
US3087198A
Cited
US3358980A
Cited
US3392580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |