US3151504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a punch and die assembly
Assignee: Nortel Networks Ltd
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Filing: 1963-10-29
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Granted: 1964-10-06
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Expires: 1983-10-29
Abstract
No abstract record available.
Inventors
- 👤 Joseph G R Pare
- 👤 Joseph G F Hotte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:29
CPC Classifications
B; B21; B21D; B21D37/00; B21D37/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A METHOD OF MAKING A PUNCH AND DIE ASSEMBLY FOR THE PRODUCTION OF STAMPINGS WHICH COMPRISES THE FOLLOWING STEPS: SHAPING THE PUNCH TO THE OUTLINE OF THE DESIRED STAMPING, THE PUNCH HAVING A FLAT STAMPING FACE, A REAR SURFACE AND SIDES PERPENDICULAR TO SAID STAMPING FACE; TAPERING THE SIDES OF THE PUNCH ADJACENT SAID STAMPING FACE, ROUNDING THE EDGES OF THE STAMPING FACE; HARDENING THE PUNCH; PRESSING THE STAMPING FACE OF THE PUNCH INTO A DIE BLOCK BEYOND THE DEPTH OF THE TAPERED SIDES OF THE PUNCH, THEREBY FORMING THE DIE WITH A CAVITY HAVING AN OPENING FORMED BY THE PERPENDICULAR SIDES OF THE PUNCH; THE DIE BLOCK MATERIAL DISPLACED DURING SAID PRESSING OPERATION BEING FORCED INTO RELIEF HOLES PREDRILLED IN SAID DIE BLOCK; SAID DIE HAVING A STAMPING FACE CONTAINING THE DIE OPENING; AND A REAR SURFACE; REMOVING THE PUNCH FROM THE DIE; MACHINING THE STAMPING FACE OF THE PUNCH TO REMOVE SAID ROUNDED EDGES AND TO FORM CUTTING EDGES AROUND SAID STAMPING FACES, MACHINING THE STAMPING FACE AND THE REAR SURFACE OF THE DIE TO REMOVE THE DISPLACED MATERIAL; CASE HARDENING THE DIE.
Claim 2
Independent Claim
185 words
A METHOD OF MAKING A PUNCH AND DIE ASSEMBLY FOR THE PRODUCTION OF STAMPINGS WHICH COMPRISES THE FOLLOWING STEPS: SHAPING THE PUNCH TO THE OUTLINE OF THE DESIRED STAMPING, THE PUNCH HAVING A FLAT STAMPING FACE, A REAR SURFACE AND SIDES PERPENDICULAR TO SAID STAMPING FACE; TAPERING THE SIDES OF THE PUNCH ADJACENT SAID STAMPING FACE, ROUNDING THE EDGES OF THE STAMPING FACE; HARDENING THE PUNCH; PRESSING THE STAMPING FACE OF THE PUNCH INTO A DIE BLOCK BEYOND THE DEPTH OF THE TAPERED SIDES OF THE PUNCH, THEREBY FORMING THE DIE WITH A CAVITY HAVING AN OPENING FORMED BY THE PERPENDICULAR SIDES OF THE PUNCH; THE DIE BLOCK MATERIAL DISPLACED DURING SAID PRESSING OPERATION BEING FORCED INTO RELIEF HOLES PREDRILLED IN SAID DIE BLOCK; SAID DIE HAVING A STAMPING FACE CONTAINING THE DIE OPENING; AND A REAR SURFACE; REMOVING THE PUNCH FROM THE DIE; MACHINING THE STAMPING FACE OF THE PUNCH TO REMOVE SAID ROUNDED EDGES AND TO FORM CUTTING EDGES AROUND SAID STAMPING FACES, MACHINING THE STAMPING FACE AND THE REAR SURFACE OF THE DIE TO REMOVE THE DISPLACED MATERIAL; CASE HARDENING THE DIE.
References Cited (Backward Citations)
US2325989A
Cited
US2432819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |