Container and method for blowmolding a base in a partial vacuum pressure reduction setup

摘要

A base of a container may include a standing surface, a first wall, a second wall, a first hinge, and a second hinge. The first hinge may be positioned between the standing surface and the first wall, the first wall being rotateable about the first hinge relative to a longitudinal axis of the container. The second hinge may be positioned between the first wall and the second wall, the second wall being rotateable about the second hinge relative to the longitudinal axis of the container, where rigidity of the base prevents substantial net distortion of the base during rotation of the second wall.

主权项

1. A base of a container formed by blow molding and comprising in an initial as-blown configuration:
a standing surface; a first wall; a first hinge having a first diameter to define a fixed axis of rotation positioned between said standing surface and said first wall, said first wall being selectively rotatable about said first hinge relative to a longitudinal axis of the container between a first configuration extending away from an interior of the container and a second configuration extending toward the interior of the container; a second wall; and a second hinge having a second diameter positioned between said first wall and said second wall, the second hinge being concentric with and a fixed distance from the first hinge, said second wall being selectively rotatable about said second hinge relative to the longitudinal axis of the container between a first configuration extending away from an interior of the container and a second configuration extending toward the interior of the container, the second diameter being retained during selective rotation of the second wall about the second hinge.