Quad-Layer Paperboard Container Corners for Stacking Strength
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Solution Overview
Problem
There is a need for a paperboard container that is stackable, structurally rigid, easy to set up, and requires a minimum amount of material in its construction, while also minimizing scrap production during the blank forming process to reduce costs.
Innovation Solution
The container features a quad-layer corner design with an outer, first medial, second medial, and inner layer, where the medial layers are configured to enhance stacking strength and minimize scrap, using corrugation that extends horizontally to improve interconnection and reduce material waste during production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple thicknesses and reinforcing structures are used in side and end walls, then stacking strength and rigidity are improved, but device complexity and material usage increase
Solution Approach 1:
The patent applies composite materials by using corrugated fiberboard with specific flute configurations (ESF-Flute, B-Flute, C-Flute) combined in a single wall construction. The composite structure of different flute types working together provides enhanced stacking strength and rigidity without requiring multiple separate reinforcing components, thus resolving the contradiction between strength and structural complexity.
Solution Approach 2:
The patent implements local quality by positioning specific flute configurations in different regions of the container walls. The ESF-Flute is used in critical areas requiring maximum compression resistance, while B-Flute and C-Flute are positioned in areas requiring different structural properties. This localized optimization achieves high stacking strength without uniformly complicating the entire structure.
2Strength
If vertical corrugation is used in container walls, then stacking strength is improved, but material usage and production complexity increase
Solution Approach 1:
The patent uses a composite corrugated structure where ESF-Flute, B-Flute, and C-Flute are combined in a single wall. This composite approach achieves superior stacking strength with optimized material usage, as each flute type contributes specific mechanical properties that complement each other, reducing the total material needed compared to using thicker single-layer boards.
Solution Approach 2:
The patent changes the physical parameters of the corrugated material by selecting specific flute configurations with different characteristics. The ESF-Flute provides high compression strength, B-Flute offers good cushioning and stacking properties, and C-Flute provides flexibility. By changing these material parameters rather than increasing thickness, the patent achieves high stacking strength with minimized material usage.
3Stability of the object's composition
If additional reinforcing structures are added to container walls, then structural rigidity is improved, but manufacturing complexity and production costs increase
Solution Approach 1:
The patent achieves structural rigidity through the inherent properties of the composite corrugated material itself, rather than adding separate reinforcing structures. The combination of ESF-Flute, B-Flute, and C-Flute in a single wall construction provides the necessary rigidity through material design, which is simpler to manufacture than assembling multiple separate reinforcing components.
Solution Approach 2:
The patent extracts the reinforcing function from separate structural components and integrates it directly into the wall material itself through the composite corrugated construction. This eliminates the need for additional reinforcing structures while maintaining structural rigidity, thereby simplifying the manufacturing process.
4Quantity of substance
If minimal material is used in container construction, then production costs are reduced, but stacking strength and structural integrity deteriorate
Solution Approach 1:
The patent resolves this contradiction by using composite corrugated materials that provide high strength-to-weight ratios. The combination of ESF-Flute, B-Flute, and C-Flute creates a material structure that achieves superior stacking strength without requiring excessive material quantity, as each flute type contributes specific mechanical properties that maximize strength efficiency.
Solution Approach 2:
The patent changes the material parameters by selecting specific flute configurations optimized for different mechanical requirements. This parameter optimization allows the container to achieve high stacking strength with minimal material usage, as the material properties are precisely tuned rather than relying on increased thickness or quantity.
Data Source
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AI summary
An article-transport container comprises a floor having a respective left-side and right-side closures foldably joined thereto. A front end closure is foldably joined to the floor and to the respective right-side and left-side closures. A rear end closure is foldably joined to the floor and to the respective right-side and left-side closures. Four quad-layer corners are defined by a first quad-layer corner, a second quad-layer corner, a third quad-layer corner, and a fourth quad-layer corner which cooperate with the respective right-side and left-side closures to define an interior region adapted to receive articles therein. The first quad-layer corner includes respective outer and inner layers and respective first and second medial layers that are sandwiched between the respective outer and inner layers to enhance stacking strength of the container while minimizing scarps produced during construction of the container.