Eight-Sided Container Stacking Platforms and Fold Line Stiffness

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Solution Overview

Problem

Existing containers used for transporting and storing products often experience weight distribution issues, leading to damage as the bottom wall of upper containers can settle into the cavity of lower containers, causing products to support excessive weight.

Innovation Solution

A blank for forming an eight-sided container with top and bottom stacking platforms, featuring preformed fold lines with increased stiffness to prevent unintended rotation and a reinforcing insert for enhanced strength, allowing for efficient stacking and weight distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If containers are stacked one on another for transport and storage, then space utilization is improved, but the bottom wall of upper containers can settle into the cavity of lower containers causing product damage

Engineering Contradiction:
Improvespace utilizationVSAvoidproduct safety
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The container bottom wall is segmented into a main body portion and an extended portion that projects outward to form a stacking platform. This segmentation allows the bottom wall to distribute the weight of upper containers across a larger area, preventing the main body from settling into the lower container's cavity and causing product damage.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The bottom wall is extended in a horizontal direction (outward projection) to create a stacking platform. This dimensional extension distributes the vertical load from stacked containers across a larger horizontal area, preventing settlement and protecting products while maintaining efficient space utilization.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Manufacturing precision

If fold lines are made with increased stiffness to prevent unintended rotation, then manufacturing precision is improved, but device complexity increases

Engineering Contradiction:
Improvefold line stabilityVSAvoidblank structure complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The blank includes a reinforcing insert positioned at a specific location (e.g., center of the blank or at corner regions) rather than uniformly strengthening the entire structure. This localized reinforcement provides the necessary stiffness to prevent unintended rotation during folding while minimizing the addition of material and structural complexity.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

A reinforcing insert made of a different material (such as a rigid insert in a flexible blank or vice versa) is combined with the base blank to create a composite structure. This composite approach provides enhanced stiffness at critical locations to prevent unintended rotation while maintaining overall manufacturing simplicity.

Inventive Principle:
Principle #40Composite materials

Data Source

PatentUS10093446B2Blanks and methods for forming containers having stacking platforms
Publication Date: 2018.10.09 WESTROCK SHARED SERVICES LLC
  • US10093446B2 patent drawing
  • US10093446B2 patent drawing
  • US10093446B2 patent drawing

AI summary

A blank of sheet material for forming a container includes a plurality of side panels and a glue panel coupled together in series along a plurality of generally parallel fold lines. At least one of the generally parallel fold lines has an increased stiffness. The blank also includes a plurality of bottom panels. At least one of the bottom panels includes at least one bottom corner portion that extends adjacent to and beneath a free bottom edge of a corresponding one of the corner panels and the glue panel. The blank further includes a plurality of top panels. At least one of the top panels includes at least one top corner portion that extends adjacent to and above a free top edge of a corresponding one of the corner panels and the glue panel.