US3174322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machines for working sheet metal
Assignee: Cookson Sheet Metal Developments Ltd
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Filing: 1961-04-26
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Granted: 1965-03-23
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Expires: 1981-04-26
Abstract
No abstract record available.
Inventors
- 👤 Cookson William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:41
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/02; B21D22/027; B21D13/00; B21D13/02; B21D39/00; B21D39/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A SHEET METAL WORKING MACHINE HAVING COOPERATING PRESS TOOLS TO RECEIVE THEREBETWEEN AN END PORTION OF A METAL SHEET HAVING AT LEAST ONE RIB AND ADAPTED TO DEFORM AND SHAPE THAT END OF THE SHEET TO CLOSE THE END OF THE RIB AND LEAVE A FLAT MARGIN AT THE END OF THE RIB, THE IMPROVEMENTS WHICH CONSISTS IN THAT THE MACHINE HAS MEANS FOR BENDING THE FLAT MARGIN TO FORM A LATERALLY EXTENDING FLANGE AT THE END OF THE SHEET, MEANS FOR TRIMMING THE FREE EDGE OF THE MARGIN, AND MEANS FOR DEFORMING THE LATERALLY EXTENDING FLANGES INTO A REVERSLY BENT FLANGE WITH THE FREE END THEREOF EXTENDING UNDER THE SHEET.
Claim 2
Dependent Claim
111 words
A SHEET METAL WORKING MACHINE HAVING COOPERATING PRESS TOOLS TO RECEIVE THEREBETWEEN AN END PORTION OF A METAL SHEET HAVING AT LEAST ONE RIB AND ADAPTED TO DEFORM AND SHAPE THAT END OF THE SHEET TO CLOSE THE END OF THE RIB AND LEAVE A FLAT MARGIN AT THE END OF THE RIB, THE IMPROVEMENTS WHICH CONSISTS IN THAT THE MACHINE HAS MEANS FOR BENDING THE FLAT MARGIN TO FORM A LATERALLY EXTENDING FLANGE AT THE END OF THE SHEET, MEANS FOR TRIMMING THE FREE EDGE OF THE MARGIN, AND MEANS FOR DEFORMING THE LATERALLY EXTENDING FLANGES INTO A REVERSLY BENT FLANGE WITH THE FREE END THEREOF EXTENDING UNDER THE SHEET.
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |