US3264730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming sheet metal corner members
Assignee: Wallace Expanding Machines Inc
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Filing: 1962-02-01
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Granted: 1966-08-09
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Expires: 1982-02-01
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Roper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:16
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/74; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49888
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PROCESS FOR FORMING SHEET METAL CORNER MEMBERS COMPRISING FORMING A SHEET METAL BLANK TO HAVE ADJACENT EDGE PORTIONS EACH INCLUDING AN INNER TERMINAL PORTION AND A PARALLEL OUTER TERMINAL PORTION, FOLDING UP THE EDGE PORTIONS OF THE METAL TO A POSITION WHEREIN THEY ARE PERPENDICULAR TO SAID BLANK AND SAID INNER TERMINAL PORTIONS ENGAGE ONE ANOTHER, FOLDING IN SAID OUTER TERMINAL PORTIONS INTO OVERLAPPING RELATION AND SO THAT THEY ARE PARALLEL TO SAID BLANK WHERBY SAID BLANK AND EDGE PORTIONS DEFINE A CORNER, PLACING A MALE DIE HAVING A SERRATED FORMING FACE WITHIN SAID CORNER AND A FEMALE DIE EXTERNALLY OF SAID CORNER, CAUSING RELATIVE MOVEMENT OF SAID DIES TOWARD ONE ANOTHER TO FORM SAID CORNER THEREBETWEEN, SPOT WELDING SAID OVERLAPPING OUTER TERMINAL PORTIONS TO ONE ANOTHER, AND PAINTING THE EXTERNAL SURFACE OF SAID CORNER WITHOUT FURTHER FINISHING OPERATIONS.
Claim 2
Dependent Claim
140 words
A PROCESS FOR FORMING SHEET METAL CORNER MEMBERS COMPRISING FORMING A SHEET METAL BLANK TO HAVE ADJACENT EDGE PORTIONS EACH INCLUDING AN INNER TERMINAL PORTION AND A PARALLEL OUTER TERMINAL PORTION, FOLDING UP THE EDGE PORTIONS OF THE METAL TO A POSITION WHEREIN THEY ARE PERPENDICULAR TO SAID BLANK AND SAID INNER TERMINAL PORTIONS ENGAGE ONE ANOTHER, FOLDING IN SAID OUTER TERMINAL PORTIONS INTO OVERLAPPING RELATION AND SO THAT THEY ARE PARALLEL TO SAID BLANK WHERBY SAID BLANK AND EDGE PORTIONS DEFINE A CORNER, PLACING A MALE DIE HAVING A SERRATED FORMING FACE WITHIN SAID CORNER AND A FEMALE DIE EXTERNALLY OF SAID CORNER, CAUSING RELATIVE MOVEMENT OF SAID DIES TOWARD ONE ANOTHER TO FORM SAID CORNER THEREBETWEEN, SPOT WELDING SAID OVERLAPPING OUTER TERMINAL PORTIONS TO ONE ANOTHER, AND PAINTING THE EXTERNAL SURFACE OF SAID CORNER WITHOUT FURTHER FINISHING OPERATIONS.
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |