Reverse lip blow molded article
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United States of America Patent
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Nov 15, 1994
Issued Date -
N/A
app pub date -
Jun 19, 1991
filing date -
Oct 31, 1988
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention is drawn to a blow molded article having a deep recessed lip wherein the lip includes a folded reinforcing layer adjacent a hollow U-shaped portion. The reinforcing layer is formed by the parison folding over on itself in the mold while forming the U-shaped lip. The folded portions are pinched together within the mold and are welded to one another. At various portions around the circumference of the lip, vents are inserted to relieve the pressure within the lip during release of the internal pressure within the molded article.
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