Core pinch-off for blow molding parison
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United States of America Patent
Stats
-
Apr 24, 1990
Issued Date -
N/A
app pub date -
Aug 11, 1986
filing date -
May 28, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A pinch-off clamp 20, built into a top 12 of a hollow core 11 within a blow molding machine 10, has jaws 21 and 22 that open to receive a leading end 18 of a parison 15, which descends into the hollow core. Then jaws 21 and 22 close together to pinch off and hold a leading region of parison 15 at top of core 11. Once parison 15 is pinched off and held closed, it can be ballooned and draped over core 11 and then blown into a double-walled box formed between the core and cavity mold parts closed around the core.
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Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- B29C Class
- 0 % this patent is cited more than
- 35 Age