Preform for small flat container and small flat container
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United States of America Patent
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Jun 17, 2008
Grant Date -
Dec 30, 2004
app pub date -
Jun 18, 2002
filing date -
Jun 29, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
To solve the limit of wall-thickness adjustment of a preform for a small flat container by a flat core by forming the outer side of a step-up-formed large-wall-thickness shell part with reducing wall thickness. A preform 1 for a small flat container whose inside diameter is completely circular and restricted to a small value is used. A shell part 12 is step-out-formed from the boundary between a neck part 11 and a shell part 12 so that the shell part 12 has a diameter larger than the neck part 11. A difference is provided between wall thickness of forward/backward sides 12a and right/left sides 12b of the shell part 12 by forming the outer side of the shell part into an ellipse form or the like from the underside of step-out at with reducing wall thickness. A stepped out part 14 is left like a disk in the underside of the neck part.
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