Paperboard Package Panel Segmentation to Prevent Bowing

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Solution Overview

Problem

Existing paperboard packages face issues with bowing of panels, leading to accidental disengagement of locking mechanisms and difficulty in sealing, particularly due to pillowing, which affects the security and usability of child-resistant packaging systems.

Innovation Solution

Incorporating a mechanism with lines of separation and demarcation in the panels to prevent bowing, where the line of separation in one panel and the line of demarcation in another panel restrict outward bowing, maintaining the locking mechanism's integrity and ensuring secure closure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If panels are made from sheet material for packaging, then the package is sustainable and easier to manufacture, but the panels are prone to bowing and pillowing under compressive forces

Engineering Contradiction:
Improveease of manufactureVSAvoidpanel stability
Core Design Contradiction:
Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The patent divides the panel into multiple sections using lines of separation and lines of demarcation. These lines create segmented regions that restrict the propagation of bowing forces, preventing the entire panel from deforming under compression while maintaining the overall structural integrity of the paperboard material.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent applies different structural characteristics to different regions of the panel. The lines of separation and demarcation create zones with varying stiffness and deformation characteristics, allowing certain areas to be more resistant to bowing while maintaining flexibility where needed, thus improving local stability without compromising overall manufacturability.

Inventive Principle:
Principle #3Local quality

2Ease of operation

If the package structure is simplified for ease of sealing, then the sealing process becomes easier, but the locking mechanism becomes vulnerable to accidental disengagement due to panel bowing

Engineering Contradiction:
Improveease of sealingVSAvoidlocking mechanism reliability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The lines of separation and demarcation are pre-formed during manufacturing, creating a structural framework that proactively prevents bowing before it can occur during sealing or transport. This preliminary structural reinforcement ensures the locking mechanism remains stable throughout the sealing process without adding complexity to the sealing operation itself.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The lines of separation and demarcation act as intermediary structural elements between the external compressive forces and the locking mechanism. These lines absorb and distribute bowing forces, preventing them from reaching the locking mechanism and causing disengagement, thus protecting the locking system while maintaining ease of sealing.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Adaptability or versatility

If the package allows flexibility for closure, then the package can be easily sealed, but the flexibility enables panel bowing that leads to accidental unlocking

Engineering Contradiction:
Improveclosure flexibilityVSAvoidpanel bowing
Core Design Contradiction:
Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The panel is segmented into multiple regions by the lines of separation and demarcation, which creates a structured flexibility. Each segment can move independently to a limited extent, allowing the package to be sealed while preventing the cumulative deformation that leads to bowing and accidental unlocking.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent changes the structural parameters of the panel by introducing lines of separation and demarcation, which modify the mechanical properties of the paperboard. These lines create zones with different stiffness characteristics, allowing controlled flexibility for closure while restraining excessive deformation that causes bowing.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS9573720B2Package made from sheet material
Publication Date: 2017.02.21 WESTROCK MWV LLC
  • US9573720B2 patent drawing
  • US9573720B2 patent drawing
  • US9573720B2 patent drawing

AI summary

A package made from sheet material has a sealable coating on a first surface. The package has a plurality of panels, folded so that at least two side panels are able to be closed in an overlapping arrangement so that the two side panels are sealed together with the first surface and sealable coating in facing relationship.