Reinforcing Locking Tabs for Corrugated Container Integrity
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Solution Overview
Problem
Existing paperboard containers with doubled-over reinforcing panel sub-assemblies at interior corners are prone to opening when over-packed, leading to loss of shape and structural integrity due to outward pressure, which is a challenge for small manufacturers who cannot afford expensive machinery for forming such containers.
Innovation Solution
Incorporating reinforcing locking tabs between the layers of the existing double wall corners of the container, formed from the same material, to prevent side walls from deflecting outward and maintain the container's shape under load, without increasing the blank size or basis weight of corrugated material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If doubled-over reinforcing panel sub-assemblies are used at interior corners, then stacking strength is improved, but the container is prone to opening when over-packed due to outward pressure on side walls
Solution Approach 1:
The reinforcing structure is segmented into multiple components: the existing doubled-over panel sub-assemblies at corners and the new locking tabs integrated into the side walls. This segmentation allows each component to perform its specific function - corner panels provide stacking strength while locking tabs prevent opening under outward pressure.
Solution Approach 2:
The locking tabs are merged with the side wall panels as integral features formed from the same corrugated material. The locking tabs are formed by cutting and folding the side wall panels themselves, combining the structural function of the side walls with the locking function in a single integrated structure.
2Reliability
If locking tabs are added to prevent side wall deflection, then resistance to opening is improved, but device complexity increases
Solution Approach 1:
The locking tabs are merged with the side wall panels as integral features formed from the same corrugated material. The locking tabs are formed by cutting and folding the side wall panels themselves, combining the structural function of the side walls with the locking function in a single integrated structure.
Solution Approach 2:
The locking tabs are formed using the side wall panels themselves as the material source. The side wall panels are cut and folded to create the locking tabs, which then serve to secure the side walls against outward pressure. The structure serves itself by using its own components to create the locking mechanism.
3Quantity of substance
If reinforcing locking tabs are formed from existing blank material, then material efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The side wall panels are segmented into multiple sections through cutting lines, with the locking tabs formed from these segments. This segmentation allows the locking tabs to be created from existing material without requiring additional blank space, while the cut and fold lines are designed to be straightforward geometric features that are relatively easy to manufacture with standard equipment.
Data Source
AI summary
A container is formed from a one-piece blank including a bottom panel, first and second opposed side walls, and first and second end walls. A top lid panel is foldably attached to the first side wall and a bottom lid panel is foldably attached to the second side wall. A plurality of reinforcing locking tabs is formed in the respective top and bottom lid panels. Each of the respective plurality of reinforcing locking tabs is sandwiched between their respective inner panel and middle panels so as to prevent the side walls from being distorted upon outward pressure applied to these side walls when the container is unreasonably over-packed during shipping and transportation.