US3269004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of roll bonding stainless steel and aluminum
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1963-05-06
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Granted: 1966-08-30
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Expires: 1983-05-06
Abstract
No abstract record available.
Inventors
- 👤 Jr George A Smith
- 👤 John H Norton
- 👤 Andersen Poul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:56
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; B23K20/227; B23K20/2275; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
IN THE METHOD OF ROLL BONDING AN ALUMINUM STRIP BETWEEN TWO STAINLESS STEEL STRIPS, WHEREIN THE ALUMINUM STRIP SANDWICHED BETWEEN THE TWO STAINLESS STEEL STRIPS IS PASSED THROUGH A ROLLING MILL AT A LINEAL SPEED IN EXCESS OF ABOUT THIRTY FEET PER MINUTE WITH THE ROLLS ARRANGED TO REDUCE THE THICKNESS OF THE ALUMINUM STRIP AT LEAST 60%, THE IMPROVEMENT WHICH COMPRISES, PROVIDING THE ROLLS WITH A SURFACE HAVING A ROUGHNESS OF AT LEAST 4 MICROINCHES, R.M.S., AND MAINTAINING THE WORK ROLLS AT A TEMPERATURE OF BETWEEN 250*F. AND 400*F., SAID METHOD BEING CHARACTERIZED BY MAINTAINING THE ROLLS AND STRIPS FREE FROM ANY ROLLING LUBRICANT.
Claim 2
Dependent Claim
105 words
IN THE METHOD OF ROLL BONDING AN ALUMINUM STRIP BETWEEN TWO STAINLESS STEEL STRIPS, WHEREIN THE ALUMINUM STRIP SANDWICHED BETWEEN THE TWO STAINLESS STEEL STRIPS IS PASSED THROUGH A ROLLING MILL AT A LINEAL SPEED IN EXCESS OF ABOUT THIRTY FEET PER MINUTE WITH THE ROLLS ARRANGED TO REDUCE THE THICKNESS OF THE ALUMINUM STRIP AT LEAST 60%, THE IMPROVEMENT WHICH COMPRISES, PROVIDING THE ROLLS WITH A SURFACE HAVING A ROUGHNESS OF AT LEAST 4 MICROINCHES, R.M.S., AND MAINTAINING THE WORK ROLLS AT A TEMPERATURE OF BETWEEN 250*F. AND 400*F., SAID METHOD BEING CHARACTERIZED BY MAINTAINING THE ROLLS AND STRIPS FREE FROM ANY ROLLING LUBRICANT.
Claim 3
Dependent Claim
112 words
IN THE METHOD OF ROLL BONDING AN ALUMINUM STRIP BETWEEN TWO STAINLESS STEEL STRIPS, WHEREIN THE ALUMINUM STRIP SANDWICHED BETWEEN THE TWO STAINLESS STEEL STRIPS IS PASSED THROUGH A ROLLING MILL WITH THE ROLLS ARRANGED TO REDUCE THE THICKNESS OF THE ALUMINUM STRIP AT LEAST 60%, THE IMPROVEMENTS WHICH COMPRISES, PROVIDING THE ROLLS WITH A SURFACE HAVING A ROUGHNESS OF AT LEAST 4 MICROINCHES, R.M.S., MAINTAINING THE WORK ROLLS AT A TEMPERATURE OF BETWEEN 250*F. AND 400*F., PRIOR TO ITS ENTRY INTO THE ROLLING MILL, AND PASSING ALUMINUM STRIP THROUGH A FURNACE ZONE HEATED TO ABOUT 900*F., SAID METHOD BEING CHARACTERIZED BY MAINTAINING THE ROLLS AND STRIPS FREE FROM ANY ROLLING LUBRICANT.
Claim 4
Dependent Claim
112 words
IN THE METHOD OF ROLL BONDING AN ALUMINUM STRIP BETWEEN TWO STAINLESS STEEL STRIPS, WHEREIN THE ALUMINUM STRIP SANDWICHED BETWEEN THE TWO STAINLESS STEEL STRIPS IS PASSED THROUGH A ROLLING MILL WITH THE ROLLS ARRANGED TO REDUCE THE THICKNESS OF THE ALUMINUM STRIP AT LEAST 60%, THE IMPROVEMENTS WHICH COMPRISES, PROVIDING THE ROLLS WITH A SURFACE HAVING A ROUGHNESS OF AT LEAST 4 MICROINCHES, R.M.S., MAINTAINING THE WORK ROLLS AT A TEMPERATURE OF BETWEEN 250*F. AND 400*F., PRIOR TO ITS ENTRY INTO THE ROLLING MILL, AND PASSING ALUMINUM STRIP THROUGH A FURNACE ZONE HEATED TO ABOUT 900*F., SAID METHOD BEING CHARACTERIZED BY MAINTAINING THE ROLLS AND STRIPS FREE FROM ANY ROLLING LUBRICANT.
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |