US3571910A
Expired / Lapsed
US
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Method of making wrought aluminous metal articles
Assignee: Reynolds Metals Co
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Filing: 1968-01-16
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Granted: 1971-03-23
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Expires: 1988-01-16
Abstract
Abstract Aluminum foil and other wrought articles including drawn and ironed can bodies are produced from aluminum base alloys containing up to about 2.5 percent iron, having a low work hardening rate above 75 percent reduction and sufficient ductility at high cold work levels to permit cold working to the extent of at least 90 percent without the necessity of annealing or stress relieving.
Inventors
- 👤 Linton D Bylund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:30
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/06; C22C21/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T29/49991
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
119 words
The method of making wrought aluminous metal articles, comprising the steps of providing an alloy consisting essentially of aluminum, from 0.6 percent to about 2.5 percent iron, by weight, and about 0.05-1.0 percent total of silicon and incidental elements not exceeding 0.25 percent each from the group consisting of copper, manganese, magnesium, chromium, nickel, zinc and titanium, said alloy having a low work-hardening rate in the region about 90 reduction; and finishing the alloy by working, including hot rolling the alloy to a hot line gauge suitable for multistand cold rolling and rolling the alloy from said hot line gauge to a coilable strip gauge in a plurality of cold rolling passes without annealing the alloy between successive passes.
Claim 2
Dependent Claim
36 words
The method of claim 2, in which said finishing includes cold rolling the alloy from a hot line gauge of about 0.125 inch in two passes to produce strip having a thickness of about 0.02 inch.
Claim 3
Dependent Claim
30 words
The method of claim 2, in which said finishing includes rolling said coilable strip into foil in a plurality of cold rolling passes without annealing the strip between successive passes.
Claim 4
Dependent Claim
34 words
The method of claim 4, w in which said finishing includes rolling the alloy from hot line gauge into foil in a plurality of cold rolling passes without annealing the alloy between successive passes.
Claim 5
Dependent Claim
36 words
The method of claim 5, in which said finishing includes rolling the alloy into foil in a plurality of cold rolling passes from hot line gauge in as-rolled condition without annealing the alloy between successive passes.
Claim 6
Dependent Claim
21 words
The method of claim 2, including the additional step of casting an ingot of the alloy preparatory to said hot rolling.
Claim 7
Dependent Claim
61 words
The method of claim 2, in which said finishing includes cold rolling the alloy in said plurality of rolling passes to produce strip having a thickness of about 0.02 inch, and, without any thermal treatment of the strip, forming a can body therefrom by drawing and ironing the strip, the resulting can body having a wall thickness of about 0.007 inch.
Claim 8
Dependent Claim
32 words
The method of claim 8, including the step of annealing the alloy at hot line gauge before cold rolling, to reduce earring of the can body during said drawing and ironing operation.
References Cited (Backward Citations)
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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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |