Container Base With Vertical Cone Displacement for Pressure Control

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Solution Overview

Problem

Existing active base designs for containers subject to improvement, particularly those with horizontally oriented invertible panels, exhibit inefficiencies in volume displacement and are prone to overpressurization and spilling.

Innovation Solution

A container base design featuring a centrally located truncated cone that is mechanically movable from an as-blown position to a displaced position, reducing internal volume through vertical displacement, with a low cone diameter to displacement distance ratio, enhancing control over vacuum and pressure levels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If existing active base designs with horizontally oriented invertible panels are used, then internal volume can be displaced, but the design is prone to overpressurization and spilling

Engineering Contradiction:

Improveinternal volume displacementVSAvoidcontrol over vacuum and pressure levels

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The patent inverts the conventional horizontal panel approach by using a vertically oriented truncated cone that moves in the vertical direction. This fundamental orientation change transforms the displacement mechanism from horizontal inversion to vertical movement, enabling better pressure control while achieving volume displacement.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent employs a truncated cone geometry with specific dimensional parameters (diameter to displacement distance ratio) that can be optimized to control the displacement characteristics. By adjusting these parameters, the system achieves precise control over volume change and pressure levels, preventing overpressurization.

Inventive Principle:

Principle #35Parameter changes

2Volume of moving object

If a large diameter horizontal panel is used for volume displacement, then internal volume can be reduced, but the panel diameter to inversion distance ratio becomes high (greater than 2:1)

Engineering Contradiction:

Improveinternal volume reductionVSAvoidpanel diameter to inversion distance ratio

Core Design Contradiction:

Volume of moving objectVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent transitions from a two-dimensional horizontal panel movement to a three-dimensional vertical cone displacement. By utilizing the vertical dimension and the conical geometry, the system achieves volume displacement with a more favorable diameter to displacement distance ratio, reducing structural complexity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Manufacturing precision

If the truncated cone is mechanically movable from as-blown position to displaced position, then internal volume is reduced and vacuum control is improved, but device complexity increases

Engineering Contradiction:

Improvecontrol over vacuum levelsVSAvoidmechanically movable base structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The truncated cone base is designed to move automatically in response to internal pressure changes during the hot-fill and cooling process. The mechanical structure utilizes the container's own internal forces to drive the displacement, eliminating the need for external actuators or complex control systems while maintaining precise vacuum control.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent employs a dynamic base structure where the truncated cone can change position based on internal pressure conditions. This dynamic behavior allows the base to automatically adapt to varying vacuum levels during the filling and cooling process, providing precise control without requiring complex external control mechanisms.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12492058B2Vertical displacement container base

Publication Date: 2025.12.09 AMCOR RIGID PACKAGING USA LLC

AI summary

A container including an opening defined by a finish portion. A base is at an end of the container opposite to the opening. The base includes a deep base ring between a standing surface and a truncated cone at a center of the base. The truncated cone is mechanically movable a displacement distance from an as-blown position to a displaced position subsequent to hot-filling and capping of the container to reduce an internal volume of the container. In the displaced position, the truncated cone is closer to the opening than in the as-blown position.