Corrugated Box With Integral Lid And Closure Flaps

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Solution Overview

Problem

Existing corrugated paperboard containers require assembly with adhesives and have inadequate stacking strength and closure mechanisms, making them impractical for use in non-industrial settings without factory equipment.

Innovation Solution

A corrugated paperboard box design featuring hingedly attached side panels, a crash bottom with reverse-scored fold lines, and closure flaps that can be assembled by displacing side panels, providing a secure and reusable container with enhanced stacking strength and a reclosable lid without adhesives.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If folding boxes are designed for field assembly without adhesives, then ease of operation is improved, but stacking strength deteriorates

Engineering Contradiction:
Improveease of assemblyVSAvoidstacking strength
Core Design Contradiction:
Ease of operationVSStrength

Solution Approach 1:

The box is divided into separate panels (side panels, end panels, bottom panel) that can be assembled without adhesives. Each panel is independently formed and joined through mechanical interlocking of flaps and slots, enabling field assembly while maintaining structural integrity through the multi-ply corrugated construction of each segment.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The box utilizes multi-ply corrugated paperboard construction where multiple layers of corrugated material are bonded together to form panels. This composite structure provides both the ease of folding/assembly and the necessary stacking strength, as the layered corrugated material maintains rigidity and load-bearing capacity without requiring adhesive assembly between panels.

Inventive Principle:
Principle #40Composite materials

2Reliability

If a lid is attached to the box for secure closure, then reliability is improved, but device complexity deteriorates

Engineering Contradiction:
Improveclosure securityVSAvoidlid attachment complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The lid is integrally formed as part of the box structure from the same blank of corrugated material. The lid panels are hingedly connected to the side panels, creating a unified structure that provides secure closure without requiring separate attachment mechanisms. The closure flaps on the lid interlock with the box structure through slots and flaps, maintaining reliability while avoiding additional complexity.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The lid closure system uses self-latching flaps that insert into slots and engage with the box structure automatically when closed. The closure flaps have tabs that fit into corresponding slots, creating a self-sustaining closed position without requiring external fasteners, adhesives, or complex locking mechanisms. This self-service closure maintains reliability while minimizing added complexity.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS9469431B2Storage box having integral lid with closure flaps
Publication Date: 2016.10.18 FELLOWES INC
  • US9469431B2 patent drawing
  • US9469431B2 patent drawing
  • US9469431B2 patent drawing

AI summary

A box having two opposed end panels having handholds, two opposed side panels, and a bottom, assembled to form a box having an opening for receiving contents therein, the box including a top panel for closing the opening, the top panel being hingedly connected to a side panel, and including a pair of closure flaps extending from the side of the top panel, the closure flaps positioned to be inserted into the handholds when the top panel is positioned to close the box.