Method of fabricating steel rule dies
Abstract
Abstract A METHOD OF FABRICATING A CURVED STEEL RULE DIE HAVING A BASE MEMBER OF PREDETERMINED CURVATURE CONFORMING TO AND FOR MOUNTING ON A ROTATABLE CYLINDER WITH STEEL RULES MOUNTED IN RECESSES IN THE BASE MEMBER HAVING THEIR OUTER WORKING EDGES LYING AT A PREDETERMINED RADIUS FROM THE ROTATIONAL AXIS OF THE CYLINDER, IN WHICH THE BASE MEMBER IS INITIALLY IN A FLAT CONDITION AND WHILE IN FLAT CONDITION A PATTERN IS APPLIED AND RECESS FORMED IN THE BASE MEMBER ACCORDING TO THE PATTERN IN A MANNER SUCH THAT WHEN THE BASE MEMBER IS CURVED TO THE PREDETERMINED CURVATURE AND STEEL RULES INSERTED INTO THE RECESSES, THE WORKING EDGES OF THE STEEL RULES LIE AT THE AFOREMENTIONED PREDETERMINED RADIUS FROM THE CENTER OF TH ROTATIONAL AXIS OF THE CYLINDER.
Inventors
- 👤 Edgar H Wolfe
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |