초록 ▼

A blown plastic container that includes a hollow plastic body, an integral blow-molded neck and an integral blow-molded finish with a radially outwardly extending blow-molded thread or bead for retaining a closure on the finish. Reinforcement is provided between the thread or bead and a ledge on the

A blown plastic container that includes a hollow plastic body, an integral blow-molded neck and an integral blow-molded finish with a radially outwardly extending blow-molded thread or bead for retaining a closure on the finish. Reinforcement is provided between the thread or bead and a ledge on the finish to prevent collapse of the finish when a closure is applied to the finish. In one form, this reinforcement includes blow-molded axial columns extending radially outwardly. In another form, the reinforcement includes geometric depressions. The reinforcement preferably is disposed circumferentially at equal angular spacing. When the container is trimmed, the finish may have an annular frustoconical radial ledge spaced from the open end of the finish. The reinforcement extends between the ledge and the lowest thread or bead, between the thread or bead, or for the full height of the finish above the ledge.

대표청구항 ▼

1. A method of manufacturing a hollow plastic container that comprises the steps of:(a) extruding a tubular parison, (b) closing blow molds around the parison, and (c) blow molding the parison to form an integrally molded container having: a blow molded hollow plastic container body, a container fin

1. A method of manufacturing a hollow plastic container that comprises the steps of:(a) extruding a tubular parison, (b) closing blow molds around the parison, and (c) blow molding the parison to form an integrally molded container having: a blow molded hollow plastic container body, a container finish with retention means extending circumferentially around the finish for retaining a closure on said finish, said finish, including said retention means, being of generally uniform radial wall thickness, a circumferentially extending radially outwardly projecting ledge axially spaced from said retention means, and reinforcing means, also of said generally uniform radial wall thickness, extending axially from said retention means to said ledge, and circumferentially around said finish between said retention means and said ledge so as to impart a continuous undulating cross section to said finish in a plane lateral to said finish between said retention means and said ledge for strengthening the container finish against collapse as a closure is applied to said finish.