Injection molded plastic closure

Details Injection molded plastic closure Injection molded plastic closure

1984-09-06

1986-01-14

Norton, Donald F.

Bottles and jars

Closures

Frangible member or portion

215321, 215329, B65D 4134, B65D 4148

Patent

active

045641137

ABSTRACT:
This relates to the formation of a cylindrical portion of an injection molded plastic member having an internal thread, rib or bead. In order to facilitate stripping of the thread, rib or bead from an associated core, the cylindrical element has formed in its exterior surface in axial alignment with the thread, rib or bead a groove of the same configuration. Thus, when the member is stripped from a core, the thread, rib or bead may expand radially outwardly into the corresponding groove without a material radial deformation of the cylindrical element.

REFERENCES:
patent: 3204799 (1965-09-01), Hunter et al.
patent: 3482725 (1969-12-01), Exton
patent: 3696957 (1972-10-01), Van Baarn
patent: 3780898 (1973-12-01), Menkel
patent: 3940103 (1976-02-01), Hilaire

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