Patent US3711937A successfully refreshed from Google Patents.
US3711937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of roll bonding to form a titanium clad aluminum composite
Assignee: Ema Corp
•
Filing: 1971-07-21
•
Granted: 1973-01-23
•
Expires: 1991-07-21
Abstract
Abstract The process of cladding a sheet of aluminum or an alloy thereof with a sheet of titanium or an alloy thereof which comprises the steps of cleaning and removing oxide and other impurities and foreign matter from the surface of the aluminum and titanium sheets to be bonded, pre-heating said aluminum and titanium sheets together at a temperature of from about 500* to 1000*F., bringing the cleaned surfaces into momentary contact under a pressure sufficient to unite the surfaces and to effect a reduction (preferably in one or two passes) of from about 3-50 percent in a resultant composite sheet and post-heating the composite which is formed at a temperature of from about 500* to 1150*F.
Inventors
- 👤 F Emley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:44
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; B23K20/233; B23K20/2333
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
17 words
The process of claim 1 wherein said pre-heating is carried out at from about 600* to 850*F.
Claim 2
Dependent Claim
16 words
The process of claim 1 wherein said reduction amounts to from about 7 to 15 percent.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein said post-heating is carried out at from about 800* to 1000*F.
Claim 4
Dependent Claim
26 words
The process of claim 1 wherein said oxide removal is performed by treatment with an abrasive belt sander using a grit size of from about 80-190.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein said reduction is achieved in two or more rolling steps.
Claim 6
Dependent Claim
20 words
The process of claim 6 wherein the reduction achieved in the first rolling step is from 0.5 to 2 percent.
References Cited (Backward Citations)
US2908073A
Cited
US3165829A
Cited
US3397045A
Cited
US3381366A
Cited
US3359142A
Cited
US3462826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |