US2918784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twisting film strips to yarn
Assignee: Dow Chemical Co
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Filing: 1957-04-26
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Granted: 1959-12-29
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Expires: 1977-04-26
Abstract
No abstract record available.
Inventors
- 👤 Faircloth Charles Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:44
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/02; D02G3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
PROCESS FOR CONVERTING FLAT FILM STRIPS OF NORMALLY CRYSTALLINE SARAN POLYMERS INTO YARN-LIKE, MONOFILAMENTTARY TEXTILE PRODUCTS WHICH COMPRISES SUBJECTING A FLAT FILM STRIP OF THE INDICATED VARIETY HAVING A THICKNESS BETWEEN ABOUT 0.5 AND 2 MILS. AND A WIDTH BETWEEN ABOUT 0.02 AND 0.25 INCH TO HEAT AT A TEMPERATURE OF ROM ABOUT 120 TO 150* C. FOR A PERIOD OF TIME BETWEEN 0.0003 AND 0.05 SECOND BY PASSING SAID STRIP IN FLAT CONTACT AT A RATE OF ROM ABOUT 50 TO 750 LINEAR FEET PEE MINUTE OVER FROM 1/8 TO 1/4 OF THE PERIPHERY OF A HOT CYLINDRICAL SURFACE HEATED TO A TEMPERATURE WITHIN SAID RANGE, AND IMMEDIATELY THEREAFTER SPIRALLY TWISTING THE STRIP AT LEAST ONE TURN PER INCH SO AS TO HAVE A TWIST MULIPLIER THEREIN BETWEEN ABOUT 0.5 AND 8.
Claim 2
Dependent Claim
133 words
PROCESS FOR CONVERTING FLAT FILM STRIPS OF NORMALLY CRYSTALLINE SARAN POLYMERS INTO YARN-LIKE, MONOFILAMENTTARY TEXTILE PRODUCTS WHICH COMPRISES SUBJECTING A FLAT FILM STRIP OF THE INDICATED VARIETY HAVING A THICKNESS BETWEEN ABOUT 0.5 AND 2 MILS. AND A WIDTH BETWEEN ABOUT 0.02 AND 0.25 INCH TO HEAT AT A TEMPERATURE OF ROM ABOUT 120 TO 150* C. FOR A PERIOD OF TIME BETWEEN 0.0003 AND 0.05 SECOND BY PASSING SAID STRIP IN FLAT CONTACT AT A RATE OF ROM ABOUT 50 TO 750 LINEAR FEET PEE MINUTE OVER FROM 1/8 TO 1/4 OF THE PERIPHERY OF A HOT CYLINDRICAL SURFACE HEATED TO A TEMPERATURE WITHIN SAID RANGE, AND IMMEDIATELY THEREAFTER SPIRALLY TWISTING THE STRIP AT LEAST ONE TURN PER INCH SO AS TO HAVE A TWIST MULIPLIER THEREIN BETWEEN ABOUT 0.5 AND 8.
References Cited (Backward Citations)
US2336100A
Cited
US2812782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |