US3226792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for crimping yarn
Assignee: English Rose Ltd
•
Filing: 1958-04-07
•
Granted: 1966-01-04
•
Expires: 1978-04-07
Abstract
No abstract record available.
Inventors
- 👤 Starkie David
- 👤 Astle-Fletcher Marcus William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:55
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/004
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
A METHOD OF IMPARTING A CRIMPED EFFECT TO THERMOPLASTIC YARN, WHICH COMPRISES STRETCHING THE YARN, HEATING IT TO A TEMPERATURE BELOW THE MELTING POINT THEREOF, WHILE STRETCHED, IN SUCH MANNER THAT A TEMPERATURE GRADIENT IS SET UP ACROSS THE YARN TO THEREBY PERMANENTLY ELONGATE ONE SIDE OF THE YARN RELATIVE TO THE OTHER, COOLING IT AND PERMITTING IT TO RELAX TO FORM THE CRIMPED EFFECT WITH THE OUTSIDE OF A CRIMP CONSTITUTED BY THE ELONGATED SIDE OF THE YARN.
Claim 2
Independent Claim
79 words
A METHOD OF IMPARTING A CRIMPED EFFECT TO THERMOPLASTIC YARN, WHICH COMPRISES STRETCHING THE YARN, HEATING IT TO A TEMPERATURE BELOW THE MELTING POINT THEREOF, WHILE STRETCHED, IN SUCH MANNER THAT A TEMPERATURE GRADIENT IS SET UP ACROSS THE YARN TO THEREBY PERMANENTLY ELONGATE ONE SIDE OF THE YARN RELATIVE TO THE OTHER, COOLING IT AND PERMITTING IT TO RELAX TO FORM THE CRIMPED EFFECT WITH THE OUTSIDE OF A CRIMP CONSTITUTED BY THE ELONGATED SIDE OF THE YARN.
Claim 3
Dependent Claim
77 words
STRAND-TREATING APPARATUS COMPRISING FORWARDING MEANS INCLUDING A PAIR OF COUNTER-ROTATING NIP ROLLS ADAPTED TO ADMIT AND FORWARD A STRAND IN ORIENTED CONDITION THEREBETWEEN, A TENSIONING DEVICE ADAPTED TO APPLY RESTRAINING TENSION TO SAID STRAND ENTERING THE ROLL NIP, HEATING MEANS EFFECTIVE TO INCREASE THE TEMPERATURE OF THE PERIPHERAL SURFACE OF ONE OF THE ROLLS, AND COOLING MEANS EFFECTIVE TO MAINTAIN THE PERIPHERAL SURFACE OF THE OTHER ROLL AT A LOWER TEMPERATURE THAN THAT OF THE FIRST ROLL.
Claim 4
Dependent Claim
77 words
STRAND-TREATING APPARATUS COMPRISING FORWARDING MEANS INCLUDING A PAIR OF COUNTER-ROTATING NIP ROLLS ADAPTED TO ADMIT AND FORWARD A STRAND IN ORIENTED CONDITION THEREBETWEEN, A TENSIONING DEVICE ADAPTED TO APPLY RESTRAINING TENSION TO SAID STRAND ENTERING THE ROLL NIP, HEATING MEANS EFFECTIVE TO INCREASE THE TEMPERATURE OF THE PERIPHERAL SURFACE OF ONE OF THE ROLLS, AND COOLING MEANS EFFECTIVE TO MAINTAIN THE PERIPHERAL SURFACE OF THE OTHER ROLL AT A LOWER TEMPERATURE THAN THAT OF THE FIRST ROLL.
References Cited (Backward Citations)
US1983326A
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US2087606A
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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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |