Chamfered Corner Box Design for Stable Stacking

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Solution Overview

Problem

Existing boxes used for packaging absorbent articles require significant manual effort for folding and erection, especially for larger boxes containing multiple flexible packages, and lack sufficient stability during stacking.

Innovation Solution

A box design featuring two chamfered corners with specific angles and overlapping flaps that form a stable structure, allowing for easy and precise folding and erection from a continuous blank of foldable sheet material.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of stationary object

If boxes are made from thinner cardboard material to reduce cost and weight, then material cost and box weight are reduced, but box stability and resistance to deformation during stacking deteriorate

Engineering Contradiction:
Improvebox weightVSAvoidbox stability during stacking
Core Design Contradiction:
Weight of stationary objectVSStability of the object's composition

Solution Approach 1:

The box is divided into multiple panels (front, back, side panels) and corner panels that are interconnected through fold lines. This segmentation allows the box to maintain stability through its geometric structure rather than relying solely on thick material, enabling the use of thinner cardboard while preserving stacking strength.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The box incorporates corner panels at specific corners rather than uniform reinforcement throughout. This asymmetric placement of structural elements provides enhanced stability at critical stress points during stacking, allowing thinner material to be used in non-critical areas while maintaining overall box strength.

Inventive Principle:
Principle #4Asymmetry

2Ease of operation

If manual folding and erection of large boxes is simplified to reduce labor effort, then ease of operation improves, but manufacturing precision and consistency may deteriorate

Engineering Contradiction:
Improveease of folding and erectionVSAvoidfolding precision
Core Design Contradiction:
Ease of operationVSManufacturing precision

Solution Approach 1:

The box design includes pre-configured fold lines, creases, and panel arrangements that are prepared in advance on the blank sheet. This preliminary structuring guides the folding process, ensuring that even with reduced manual effort, the box maintains consistent precision and quality across production batches.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentEP3932818B1Box with chamfered corners
Publication Date: 2025.06.25 PROCTER & GAMBLE CO
  • EP3932818B1 patent drawingFigure 1
  • EP3932818B1 patent drawingFigure 2
  • EP3932818B1 patent drawingFigure 3

AI summary

The present invention relates to a box having two chamfered corners. The box has a front and a back panel, two side panels and two corner panels. The box also has a top panel and a bottom panel. The top panel has two major flaps and two minor flaps with unique configuration which enables easy folding, closing and opening of the box.