US3156016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tow opening
Assignee: Celanese Corp
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Filing: 1961-11-13
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Granted: 1964-11-10
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Expires: 1981-11-13
Abstract
No abstract record available.
Inventors
- 👤 Donald T Dunlap
- 👤 Pierre Richard E St
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:18
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
180 words
THE PROCESS OF TREATING A CRIMPED MULTIFILAMENT TOW COMPRISING THE STEPS OF SPREADING SAID TOW INTO THE FORM OF A FLAT BAND, LONGITUDINALLY ADVANCING THE BANDSHAPED TOW BETWEEN AND IN CONTACT WITH A FIRST PAIR OF IDLY ROTATABLE OPPOSED CYLINDRICAL SURFACES BOTH OF WHICH ARE SMOOTH AND ARE ROTATED IN RESPONSE TO MOVEMENT OF SAID TOW THEREBETWEEN SO AS TO EXERT A DRAG ON SAID TOW, FURTHER ADVANCING SAID TOW BETWEEN AND IN CONTACT WITH EACH OF A TANDEM SERIES OF ADDITIONAL PAIRS OF OPPOSED CYLINDRICAL SURFACES WHEREIN ONE SURFACE OF EACH OF SAID ADDITIONAL PAIRS IS CIRCUMFERENTIALLY RIDGED AND THE OTHER SURFACE OF EACH ADDITIONAL PAIR IS SMOOTH, POSITIVELY ROTATING AT LEAST ONE SURFACE OF EACH PAIR OF SAID ADDITIONAL PAIRS OF SURFACES AT RESPECTIVE PROGRESSIVELY HIGHER SURFACE SPEEDS SO AS TO DIFFERENTIALLY GRIP SAID TOW AS IT MOVES FROM SAID FIRST PAIR OF SURFACE TO THE LAST OF SAID ADDITIONAL PAIRS OF SURFACES, WHEREBY THE FILAMENTS OF SAID TOW ARE SEPARATED LONGITUDINALLY AND THE CRIMPS IN ADJACENT FILAMENTS ARE DEREGISTERED SO AS TO RESULT IN AN OPEN TOW.
Claim 2
Dependent Claim
180 words
THE PROCESS OF TREATING A CRIMPED MULTIFILAMENT TOW COMPRISING THE STEPS OF SPREADING SAID TOW INTO THE FORM OF A FLAT BAND, LONGITUDINALLY ADVANCING THE BANDSHAPED TOW BETWEEN AND IN CONTACT WITH A FIRST PAIR OF IDLY ROTATABLE OPPOSED CYLINDRICAL SURFACES BOTH OF WHICH ARE SMOOTH AND ARE ROTATED IN RESPONSE TO MOVEMENT OF SAID TOW THEREBETWEEN SO AS TO EXERT A DRAG ON SAID TOW, FURTHER ADVANCING SAID TOW BETWEEN AND IN CONTACT WITH EACH OF A TANDEM SERIES OF ADDITIONAL PAIRS OF OPPOSED CYLINDRICAL SURFACES WHEREIN ONE SURFACE OF EACH OF SAID ADDITIONAL PAIRS IS CIRCUMFERENTIALLY RIDGED AND THE OTHER SURFACE OF EACH ADDITIONAL PAIR IS SMOOTH, POSITIVELY ROTATING AT LEAST ONE SURFACE OF EACH PAIR OF SAID ADDITIONAL PAIRS OF SURFACES AT RESPECTIVE PROGRESSIVELY HIGHER SURFACE SPEEDS SO AS TO DIFFERENTIALLY GRIP SAID TOW AS IT MOVES FROM SAID FIRST PAIR OF SURFACE TO THE LAST OF SAID ADDITIONAL PAIRS OF SURFACES, WHEREBY THE FILAMENTS OF SAID TOW ARE SEPARATED LONGITUDINALLY AND THE CRIMPS IN ADJACENT FILAMENTS ARE DEREGISTERED SO AS TO RESULT IN AN OPEN TOW.
Claim 3
Dependent Claim
149 words
APPARATUS FOR TREATING A CRIMPED MULTIFILAMENT TOW, COMPRISING BANDING JET MEANS FOR SHAPING SAID TOW INTO A FLAT BAND, AT LEAST ONE PAIR OF OPPOSED DIFFERENTIAL GRIPPING ROLLS BETWEEN AND IN CONTACT WITH WHICH SAID TOW IS ADAPTED TO PASS, IN EACH PAIR ONE OF SAID DIFFERENTIAL GRIPPING ROLLS BEING PROVIDED WITH A PROFILED SURFACE AND THE OTHER BEING SMOOTH-SURFACED, DRIVE MEANS OPERATIVELY CONNECTED TO AT LEAST ONE ROLL OF EACH PAIR SO AS TO ROTATE THE SAME POSITIVELY AT A PREDETERMINED SURFACE SPEED, THE ROLLS OF EACH PAIR BEING BIASED TOWARD ONE ANOTHER AND BEING ROTATABLE TOGETHER, WHEREBY SAID TOW UPON MOVING THROUGH SAID DIFFERENTIAL GRIPPING ROLLS WHILE THE LATTER ARE BEING ROTATED BY SAID DRIVE MEANS IS DIFFERENTIALLY GRIPPED TO EFFECT A LONGITUDINAL SEPARATION OF THE FILAMENTS OF SAID TOW AND DEREGISTRATION OF THE CRIMPS OF ADJACENT FILAMENTS SO AS TO RESULT IN A COMPLETELY OPENED TOW.
Claim 4
Dependent Claim
149 words
APPARATUS FOR TREATING A CRIMPED MULTIFILAMENT TOW, COMPRISING BANDING JET MEANS FOR SHAPING SAID TOW INTO A FLAT BAND, AT LEAST ONE PAIR OF OPPOSED DIFFERENTIAL GRIPPING ROLLS BETWEEN AND IN CONTACT WITH WHICH SAID TOW IS ADAPTED TO PASS, IN EACH PAIR ONE OF SAID DIFFERENTIAL GRIPPING ROLLS BEING PROVIDED WITH A PROFILED SURFACE AND THE OTHER BEING SMOOTH-SURFACED, DRIVE MEANS OPERATIVELY CONNECTED TO AT LEAST ONE ROLL OF EACH PAIR SO AS TO ROTATE THE SAME POSITIVELY AT A PREDETERMINED SURFACE SPEED, THE ROLLS OF EACH PAIR BEING BIASED TOWARD ONE ANOTHER AND BEING ROTATABLE TOGETHER, WHEREBY SAID TOW UPON MOVING THROUGH SAID DIFFERENTIAL GRIPPING ROLLS WHILE THE LATTER ARE BEING ROTATED BY SAID DRIVE MEANS IS DIFFERENTIALLY GRIPPED TO EFFECT A LONGITUDINAL SEPARATION OF THE FILAMENTS OF SAID TOW AND DEREGISTRATION OF THE CRIMPS OF ADJACENT FILAMENTS SO AS TO RESULT IN A COMPLETELY OPENED TOW.
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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |