US3359609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for crimping thermoplastic filamentary material
Assignee: British Nylon Spinners Ltd
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Filing: 1964-09-14
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Granted: 1967-12-26
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Expires: 1984-09-14
Abstract
No abstract record available.
Inventors
- 👤 Iwnicki Kurt
- 👤 Thomas James Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:53
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
127 words
A PROCESS FOR CRIMPING AND TREATING UNDRAWN THERMOPLASTIC FILAMENTARY MATERIAL COMPRISING THE STEPS OF (A) CONTINUOUSLY DRAWING A UNIT OF SAID MATERIAL TO ORIENT THE MOLECULES THEREOF; (B) CONTINUOUSLY FORWARDING SAID DRAWN MATERIAL AT A UNIFORM RATE TO FEED MEANS FOR A STUFFER-BOX CRIMPER; (C) CRIMPING SAID DRAWN MATERIAL IN SAID CRIMPER; (D) FORWARDING SAID DRAWN CRIMPED MATERIAL OUT OF SAID CRIMPER IN COMPACTED FORM BY THE PRESSURE EXERTED ON IT IN SAID CRIMPER; (E) DIRECTING SAID MATERIAL AT LEAST SUBSTNTIALLY TANGENTIALLY INTO ONE END OF AN ANNULAR TREATING ZONE; (F) ADVANCING SAID MATERIAL AXIALLY OF SAID ZONE IN A PLURALITY OF CONTIGUOUS HELICAL COILS THEREALONG WHILST THE CRIMP IS SET; AND (G) CONTINUOUSLY WITHDRAWING THE MATERIAL IN UNITARY FORM FROM THE LAST OF SAID HELICAL COILS.
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) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |