Patent US3287536A successfully refreshed from Google Patents.
US3287536A
Expired / Lapsed
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Method and apparatus for forming spiral pipe
Assignee: FAY PIPE AND PILE CO Inc
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Filing: 1965-03-24
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Granted: 1966-11-22
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Expires: 1985-03-24
Abstract
No abstract record available.
Inventors
- 👤 James E Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:14
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A METHOD FOR CONTINUOUSLY PRODUCING SPIRAL PIPE FROM A SHEET MATERIAL COMPRISING, (A) FEEDING THE SHEET MATERIAL INTO A SHEET WORKING UNIT ADAPTED TO FORM A DEFORMED SPIRAL LOOP; (B) FORMING A DEFORMED SPIRAL LOOP HAVING ITS ADVANCED EDGES HELD IN A SPACED-APART RELATIONSHIP DUE TO THE DEFORMATION OF THE LOOP; (C) HEATING THE ADVANCED EDGES OF THE DEFORMED SPIRAL LOOP; (D) FEEDING THE DEFORMED SPIRAL LOOP HAVING ITS ADVANCED EDGES HEATED INTO A REFORMING AND JOINING UNIT CAPABLE OF REFORMING THE DEFORMED LOOP AND JOINING ITS EDGES TOGETHER; (E) REFORMING THE DEFORMED LOOP AS IT IS FED INTO THE REFORMING JOINING MEANS;
Claim 2
Independent Claim
103 words
A METHOD FOR CONTINUOUSLY PRODUCING SPIRAL PIPE FROM A SHEET MATERIAL COMPRISING, (A) FEEDING THE SHEET MATERIAL INTO A SHEET WORKING UNIT ADAPTED TO FORM A DEFORMED SPIRAL LOOP; (B) FORMING A DEFORMED SPIRAL LOOP HAVING ITS ADVANCED EDGES HELD IN A SPACED-APART RELATIONSHIP DUE TO THE DEFORMATION OF THE LOOP; (C) HEATING THE ADVANCED EDGES OF THE DEFORMED SPIRAL LOOP; (D) FEEDING THE DEFORMED SPIRAL LOOP HAVING ITS ADVANCED EDGES HEATED INTO A REFORMING AND JOINING UNIT CAPABLE OF REFORMING THE DEFORMED LOOP AND JOINING ITS EDGES TOGETHER; (E) REFORMING THE DEFORMED LOOP AS IT IS FED INTO THE REFORMING JOINING MEANS;
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |