Blow molding apparatus
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United States of America Patent
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-
Aug 21, 1990
Grant Date -
N/A
app pub date -
Jul 19, 1989
filing date -
Jul 19, 1989
priority date (Note) -
Expired
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Abstract
A blow molding machine having a mold cavity, a blow needle bore opening into the cavity with a blow needle in the bore, a vacuum source for drawing blow air from a molded article and an exhaust passage extending from the blow needle bore to the source for reducing pressure within the blown article.
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