Method for making an extrusion blow molded no drip lip

Details Method for making an extrusion blow molded no drip lip Method for making an extrusion blow molded no drip lip

1982-10-20

1985-10-08

Silbaugh, Jan

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

264536, 425527, 425531, B29C 1707, B29C 1710

Patent

active

045459533

ABSTRACT:
An extrusion blow molded container is provided having an integrally formed generally annular pouring lip including an upwardly facing convex surface beginning at a generally vertical inner wall of the container and curving through an arc of less than 180 degrees. The lip is undercut forming a sharp downwardly directed annular edge on the lip. The lip can be formed by cutting the lip with a downwardly curved cutting tool bearing against an upwardly curved anvil, the cutting tool forming the upwardly facing convex surface of the lip and the anvil forming the undercut lower surface of the lip.

REFERENCES:
patent: 3209401 (1965-10-01), Mennert
patent: 3224038 (1965-12-01), Budesheim
patent: 3357053 (1967-12-01), Lyon et al.
patent: 3531556 (1970-09-01), Mennert
patent: 3767747 (1973-10-01), Uhlig
patent: 3822161 (1974-07-01), Haase
patent: 3912438 (1975-10-01), Padovani
patent: 3917788 (1975-11-01), Padovani
patent: 3949034 (1976-04-01), Uhlig
patent: 4409178 (1983-10-01), Ward

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