Method of shaping container bodies and corresponding apparatus
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United States of America Patent
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Jun 1, 2010
Grant Date -
Nov 29, 2007
app pub date -
Apr 13, 2005
filing date -
Apr 16, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
Method wherein a) a container (1, 6) is placed in a two halves mould (2) having an internal shaped wall (21), b) an internal pressure P of a fluid is build up so as to shape the skirt (12), is characterized in that an external pressure P'of a fluid is applied in an upper space (101) contiguous to an external or upper surface (100) of the open top end (10) and/or in a lower space (141) contiguous to an external or lower surface (140) of the shaped bottom end (14), so as to have, during the span of time .DELTA.t, a pressure difference .DELTA.P|P-P'1 low enough to prevent any distortion of the shaped open top end (10) and/or the shaped bottom end (14), so as to form a shaped metallic container (1', 6'). An apparatus for carring out the method is also disclosed.
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