US3834847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open cell foam device for gas distribution in filament quenching chimneys
Assignee: EIDP Inc
•
Filing: 1970-01-16
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Granted: 1974-09-10
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Expires: 1990-01-16
Abstract
Abstract A chimney used for quenching synthetic filaments after they are extruded is divided into a plenum chamber and a quenching chamber by means of a porous open-celled polyurethane foam rather than a conventional screen assembly to improve quench medium distribution into the quench chamber.
Inventors
- 👤 E Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:01
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/08; D01D5/088; D01D5/092
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
An apparatus for the production of synthetic filaments including an elongated chimney, a porous open-celled foam sheet dividing said chimney longitudinally into a quenching chamber through which filaments pass in a path from an extrusion device to a collecting means and a plenum chamber, conduit means connected to said plenum chamber for supplying a quenching medium thereto, the improvement for restricting the flow of quenching medium into said plenum in a varying distribution pattern comprising: a perforated plate positioned across said conduit means upstream of said plenum chamber; and a layer of porous open-celled foam of varying thickness attached to said plate, thereby permitting the attainment of a varying distribution pattern for said quenching medium entering said plenum chamber.
Claim 2
Independent Claim
119 words
An apparatus for the production of synthetic filaments including an elongated chimney, a porous open-celled foam sheet dividing said chimney longitudinally into a quenching chamber through which filaments pass in a path from an extrusion device to a collecting means and a plenum chamber, conduit means connected to said plenum chamber for supplying a quenching medium thereto, the improvement for restricting the flow of quenching medium into said plenum in a varying distribution pattern comprising: a perforated plate positioned across said conduit means upstream of said plenum chamber; and a layer of porous open-celled foam of varying thickness attached to said plate, thereby permitting the attainment of a varying distribution pattern for said quenching medium entering said plenum chamber.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |