US3295160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for spinning filaments of synthetic thermoplastic fiber-forming polymers
Assignee: Oerlikon Barmag AG
•
Filing: 1964-07-21
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Granted: 1967-01-03
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Expires: 1984-07-21
Abstract
No abstract record available.
Inventors
- 👤 Schippers Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:10
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06; D01D1/09; B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/375; B29C48/387; B29C48/395; B29C37/00; B29C2037/96; B29C48/03; B29C48/04; B29C48/05; B29C48/365
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN AN APPARATUS FOR SPINNING FILAMENTS OF SYNTHETIC THERMOPLASTIC FIBER-FORMING POLYMERS INCLUDING (A) AN EXTRUSION SCREW DEVIDED ALONG ITS TOTAL LENGTH INTO A FEED SECTION, A COMPRESSION SECTION AND A METERING SECTION, (B) A SPINNING PUMP ADAPTED TO RECEIVE MOLTEN POLYMER FROM SAID EXTRUSION SCREW AND (C) A SPINNERET ADAPTED TO RECEIVE THE MOLTEN POLYMER FROM THE SPINNING PUMP AND CONTAINING OPENINGS FOR EXTRUSION OF THE POLYMER INTO FILAMENTS, THE IMPROVEMENT OF A METERING SECTION OF SAID EXTRUSION SCREW WHICH IS AT LEAST 12 TIMES THE DIAMETER OF SAID SCREW, A THREAD DEPTH IN SAID METERING SECTION WHICH IS AT LEAST 3.5% OF THE SCREW DIAMETER AND A TOTAL LENGTH OF THE EXTRUSION SCREW WHICH IS EQUAL TO ABOUT 20 TO 27 TIMES THE SCREW DIAMETER.
Claim 2
Dependent Claim
126 words
IN AN APPARATUS FOR SPINNING FILAMENTS OF SYNTHETIC THERMOPLASTIC FIBER-FORMING POLYMERS INCLUDING (A) AN EXTRUSION SCREW DEVIDED ALONG ITS TOTAL LENGTH INTO A FEED SECTION, A COMPRESSION SECTION AND A METERING SECTION, (B) A SPINNING PUMP ADAPTED TO RECEIVE MOLTEN POLYMER FROM SAID EXTRUSION SCREW AND (C) A SPINNERET ADAPTED TO RECEIVE THE MOLTEN POLYMER FROM THE SPINNING PUMP AND CONTAINING OPENINGS FOR EXTRUSION OF THE POLYMER INTO FILAMENTS, THE IMPROVEMENT OF A METERING SECTION OF SAID EXTRUSION SCREW WHICH IS AT LEAST 12 TIMES THE DIAMETER OF SAID SCREW, A THREAD DEPTH IN SAID METERING SECTION WHICH IS AT LEAST 3.5% OF THE SCREW DIAMETER AND A TOTAL LENGTH OF THE EXTRUSION SCREW WHICH IS EQUAL TO ABOUT 20 TO 27 TIMES THE SCREW DIAMETER.
References Cited (Backward Citations)
US3123860A
Cited
US2541201A
Cited
US2692405A
Cited
US2705343A
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US2872703A
Cited
US3183553A
Cited
US3145420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |