Bonding of precious metal to a metal substrate and product therefor
Abstract
Abstract A METHOD IS PROVIDED FOR PRODUCING A COMPOSITE METAL STRIP COMPRISING A METAL SUBSTRATE WITH PIECES OF PRECIOUS METAL BONDED THERETO IN SPACED POSITIONS IN THE LONGITUDINAL DIRECTION OF THE STRIP. THE METHOD COMPRISES FEEDING A COLD METAL SUBSTRATE STRIP TO A BONDING STATION COMPRISING A LOWER DIE SUPPORT ON WHICH THE STRIP IS SUPPORTED AND A PRESSURE-APPLYING DIE DISPOSED ABOVE SAID SUPPORTING DIE, PROGRESSIVELY FEEDING PIECES OF PRECIOUS METAL TO BETWEEN SAID UPPER AND LOWER DIES, AND IMMEDIATELY APPLYING BONDING PRESSURE SEQUENTIALLY TO EACH OF SAID PIECES SUFFICIENT TO DEFORM EACH PIECE AT LEAST 20% OF ITS HEIGHT WHLE THE PIECE IS AT A TEMPERATURE ABOVE ITS RECRYSTALLIZATION TEMPERATURE BUT BELOW ITS MELTING POINT, WHEREBY EACH OF THE PIECES IS METALLURGICALLY BONDED TO THE COLD SUBSTRATE STRIP IN SPACED POSITIONS ALONG THE STRIP WITH SUBSTANTIALLY NO ALLOY DIFFUSION ZONE AT THE BONDED INTERFACE OF THE COMPOSITE.
Inventors
- 👤 Akira Shibata
Bibliographic Details
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |