US2010034694A1PendingUtilityA1

Alloy

53
Assignee: SMITH GLENN CROSBIEPriority: Jun 24, 2008Filed: Jun 23, 2009Published: Feb 11, 2010
Est. expiryJun 24, 2028(~1.9 yrs left)· nominal 20-yr term from priority
Inventors:Glenn C. SmithGraham Alfred FlukesSarah Elizabeth Pickthall
C22C 21/00B41N 1/083C22F 1/04
53
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Claims

Abstract

An Al alloy suitable for processing into a lithographic sheet, the alloy having a composition in weight % of: Fe 0.16 to 0.40 Si up to 0.25 Cu up to 0.01 Mn up to 0.05 Ti up to 0.015 Mg 0.02 to 0.10 Zn up to 0.06 unspecified other components up to 0.03 each Al balance, wherein the minimum Al content is 99.3.

Claims

exact text as granted — not AI-modified
1 . An Al alloy suitable for processing into a lithographic sheet, the alloy having a composition in weight % of:
 Fe 0.16 to 0.40   Si up to 0.25   Cu up to 0.01   Mn up to 0.05   Ti up to 0.15   Mg 0.02 to 0.10   Zn up to 0.06   Unspecified other components up to 0.03 each   Al balance, wherein the minimum Al content is 99.3.   
   
   
       2 . An alloy according to  claim 1  wherein the minimum aluminium (Al) content is 99.45 wt %. 
   
   
       3 . An alloy according to  claim 1  or  claim 2  wherein the minimum aluminium content is 99.50 wt %. 
   
   
       4 . An alloy according to  claim 1  containing up to 0.099 wt % magnesium. 
   
   
       5 . An alloy according to  claim 1  wherein the magnesium content is preferably within the range 0.02 to 0.05 wt %. 
   
   
       6 . An alloy according to  claim 1  wherein the minimum zinc (Zn) content is 0.02 wt %. 
   
   
       7 . An alloy according to  claim 1 , wherein the ration of zinc to magnesium in the alloy is substantially within the range 0.1 to 2.3. 
   
   
       8 . An alloy according to  claim 1  containing up to 0.049 wt % manganese. 
   
   
       9 . An alloy according to  claim 1  wherein the minimum manganese (Mn) content is 0.005 wt %. 
   
   
       10 . An alloy according to  claim 1  wherein the manganese (Mn) content falls with the range 0.005 to 0.030 wt %. 
   
   
       11 . An alloy according to  claim 1  wherein the manganese to magnesium ratio is substantially within the range 0.08 to 1.63. 
   
   
       12 . A lithographic sheet formed from an alloy according to  claim 1 . 
   
   
       13 . A method of processing a lithographic sheet according to  claim 12 . 
   
   
       14 - 16 . (canceled)

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