| (19) |
 |
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(11) |
EP 1 676 931 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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26.07.2006 Bulletin 2006/30 |
| (43) |
Date of publication A2: |
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05.07.2006 Bulletin 2006/27 |
| (22) |
Date of filing: 11.12.2001 |
|
| (51) |
International Patent Classification (IPC):
|
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| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
| (30) |
Priority: |
11.12.2000 EP 00311029
25.07.2001 GB 0118100
|
| (62) |
Application number of the earlier application in accordance with Art. 76 EPC: |
|
01270197.5 / 1341942 |
| (71) |
Applicant: Novelis, Inc. |
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Toronto, Ontario M5J 1S9 (CA) |
|
| (72) |
Inventors: |
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- Rottwinkel, Theodor
37139 Adelebsen (DE)
- Wright, David Skingley
37124 Rosdorf-Dramfeld (DE)
- Hamerton, Richard Gary
Chipping Norton
Oxfordshire OX7 5LF (GB)
- Brown, Jeremy Mark
Banbury
Oxon OX16 0ED (GB)
- Ward, John Andrew
Leamington Spa
Warwickshire CV32 7TA (GB)
|
| (74) |
Representative: Knowles, James Atherton |
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Stevens Hewlett & Perkins
1 St Augustine's Place
Bristol BS1 4UD
Bristol BS1 4UD (GB) |
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| |
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| (54) |
Aluminium alloy for lithographic sheet |
(57) A lithographic sheet obtainable by a method not including an interannealing step
is disclosed. The sheet is formed from an alloy having a composition in wt%:
Mg 0.05 to 0.30
Mn 0.05 to 0.25
Fe 0.11 to 0.40
Si up to 0.25
Ti up to 0.03
B up to 0.01
Cu up to 0.01
Cr up to 0.03
Zn up to 0.15
Unavoidable impurities up to 0.05 each, 0.15 total,
Al balance.
Also disclosed is the alloy with a composition as above and a method for forming the
lithographic sheet.