METHOD AND APPARATUS FOR FORMING A CAN END WITH CONTROLLED THINNING OF FORMED PORTIONS OF THE CAN END
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United States of America Patent
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Issued Date -
Feb 19, 2015
app pub date -
Aug 19, 2013
filing date -
Aug 19, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A can end blank is initially cupped and a central portion of the cup is rolled up with an annular portion of the cup being free formed without substantial contact with any tooling except to prevent overextension of the free formed material and to define a final geometry of the free formed material as the forming press reaches a bottom of its forming stroke. The free forming may be accomplished by controlling the motion of a crown ring using a delay cam assembly so that the motion of the crown ring is independent of the motion of the rest of the tooling which is controlled by the motion of the ram or punch assembly of the forming press.
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