Method for making can bodies having axial ribs and step shoulder bottoms
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United States of America Patent
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Jan 1, 2013
Grant Date -
Oct 20, 2011
app pub date -
Apr 16, 2010
filing date -
Apr 16, 2010
priority date (Note) -
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Abstract
A method for forming at least one rib and a step shoulder bottom of a can body in a single drawing operation from a redrawn cup or preform which has a closed end with an inwardly tapering annular periphery that includes sufficient material to enable formation of the step shoulder bottom without having the at least one rib drawn into the step shoulder bottom.
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