Drawing-blowing method and device for molding thermoplastic material containers, in particular bottles, with petaloid bottoms
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United States of America Patent
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Nov 8, 2011
Grant Date -
Jun 14, 2007
app pub date -
Dec 7, 2006
filing date -
Dec 8, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to manufacturing thermoplastic material containers (2) with a petaloid bottom (4) by drawing-blowing hot preforms (16) in a blowing mold that has a petaloid mold bottom (1) including radiating ridges (13) alternating with cavities (11) that are adapted to form the valleys (7) and the feet (5), respectively, of the container bottom; during drawing, heat losses are reduced in longitudinal zones (19) of the end part (20) of the preforms, extending over the bottom (18) and over an axial portion of their body (21), distributed over the periphery of the ends of the preforms facing respective cavities (11) of the mold bottom (1).
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