Method and apparatus for manufacturing aluminum alloy strip for lithographic printing plates
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United States of America Patent
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Nov 1, 2011
Grant Date -
Jan 1, 2009
app pub date -
Jun 13, 2008
filing date -
Jun 29, 2007
priority date (Note) -
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Abstract
An apparatus for manufacturing aluminum alloy strip for a lithographic printing plate supports includes a filter, a launder connected to the filter, a liquid level controller connected to the launder, and a melt feed nozzle connected to the liquid level controller. The liquid level controller includes a step to trap settled particles within an aluminum melt which forms the alloy strip. The launder has a length L (m) which satisfies the condition 4≧L≧V×270×1.2×D, where V is the flow velocity in meters per second of the aluminum melt in the launder and D is the depth in meters of the aluminum melt in the launder.
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