Patent US3680334A successfully refreshed from Google Patents.
US3680334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus having chamber of oval cross-section for heat treating largedenier tow
Assignee: Phillips Petroleum Co
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Filing: 1971-01-20
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Granted: 1972-08-01
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Expires: 1991-01-20
Abstract
Abstract Fibers of propylene polymers and the like are passed rapidly through an elongated oval chamber by means of a pair of tensioning means wherein they are subjected to saturated steam to give a soil resistant resilient product.
Inventors
- 👤 Wayne K Erickson
- 👤 David R Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:00
CPC Classifications
D; D06; D06C; D06C29/00; D01; D01D; D01D10/00; D01D10/04; D01D10/0436; D01D10/0481
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
Filament tow treating apparatus comprising in combination: an elongated oval chamber having a tow receiving opening at a first end thereof and an exit opening at a second end thereof, said chamber having a ratio of the major axis to minor axis of from 2:1 to 200:1, said chamber having a plurality of holes therein; a jacket around at least the flat sides opposite said minor axis of said oval chamber, said jacket being sealed at each end thereof to said oval chamber to form at least one steam enclosure; steam inlet means on said enclosure; and means for transporting tow through said oval chamber under tension.
Claim 2
Dependent Claim
107 words
Filament tow treating apparatus comprising in combination: an elongated oval chamber having a tow receiving opening at a first end thereof and an exit opening at a second end thereof, said chamber having a ratio of the major axis to minor axis of from 2:1 to 200:1, said chamber having a plurality of holes therein; a jacket around at least the flat sides opposite said minor axis of said oval chamber, said jacket being sealed at each end thereof to said oval chamber to form at least one steam enclosure; steam inlet means on said enclosure; and means for transporting tow through said oval chamber under tension.
Claim 3
Dependent Claim
43 words
Apparatus according to claim 1 wherein said means for transporting said tow through said oval chamber comprises a first set of three rolls at the forward end of said oval chamber and a second set of three rolls at the exit end thereof.
Claim 4
Dependent Claim
34 words
Apparatus according to claim 1 wherein said holes are spaced on said oval chamber in a spiral configuration with the axial distance between successive holes being within the range of 0.2 to 2 inches.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 1 wherein said holes are placed in a random pattern.
Claim 6
Dependent Claim
19 words
Apparatus according to claim 1 wherein said holes have a diameter within the range of 10 to 200 mils.
Claim 7
Dependent Claim
21 words
Apparatus according to claim 1 wherein said treating chamber has an axial length within the range of 1 to 10 feet.
Claim 8
Dependent Claim
91 words
Apparatus according to claim 1 wherein said means for transporting said tow through said chamber comprises a first set of three rolls that the forward end of said chamber and a second set of three rolls at the exit end thereof; wherein said holes are arranged in a generally spiral configuration on said chamber and are spaced axially apart a distance of 0.5 to 0.7 inches and have a diameter within the range of 15-50 mils; and wherein said chamber has a length in the range of 2 to 5 feet.
Claim 9
Dependent Claim
16 words
Apparatus according to claim 1 wherein said ratio is within the range of 25:1 to 200:1.
Claim 10
Dependent Claim
17 words
Apparatus according to claim 8 wherein said holEs have a diameter within the range of 10-200 mils.
Claim 11
Dependent Claim
43 words
Apparatus according to claim 9 wherein said means for transporting said tow through said oval chamber comprises a first set of three rolls at the forward end of said oval chamber and a second set of three rolls at the exit end thereof.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |