초록 ▼

Molded preform for blow molding a plastic container for pressurized applications, the preform having a base with a multilayer wall for forming a delamination and crack resistant multilayer footed container base. The preform base forming region has an end cap portion with a non-spherical inner wall,

Molded preform for blow molding a plastic container for pressurized applications, the preform having a base with a multilayer wall for forming a delamination and crack resistant multilayer footed container base. The preform base forming region has an end cap portion with a non-spherical inner wall, including a flattened central section joined by arcuate corner sections to a generally cylindrical outer section. The inner wall sections provide a varying end cap thickness profile which enhances orientation in select portions of the footed container base for improved performance and/or lightweighting of the container base.

대표청구항 ▼

The invention claimed is: 1. A plastic container for pressurized applications having a crack resistant multilayer footed base, the container formed by a method comprising:providing a molded preform having an end cap region including a multilayer wall, the end cap region including a generally spheric

The invention claimed is: 1. A plastic container for pressurized applications having a crack resistant multilayer footed base, the container formed by a method comprising:providing a molded preform having an end cap region including a multilayer wall, the end cap region including a generally spherical outer surface and a relatively flattened central inner surface providing an end cap thickness profile which includes extending radially outwardly from a central longitudinal axis of the preform:a central thickened end cap region;an intermediate end cap region which is thinner than the central region; andan outer end cap region which is thicker than the intermediate region; andblow molding the preform to form a plastic container for pressurized applications having a delamination and crack resistant multilayer footed base.