Folded Paperboard Corner Structure for Faster Protective Packaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing protective corners made from corrugated cardboard are expensive and time-consuming to produce, while those made from multiple sheets of non-corrugated paperboard require complex manipulation, making the manufacturing process lengthy.
Innovation Solution
A paperboard protective corner is manufactured using a single unlaminated paperboard sheet folded into multiple layers to form wings with nested side edges, creating a robust structure that resists crushing forces, and is produced in a continuous manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If protective corners are made from corrugated cardboard, then protective strength is improved, but manufacturing cost and production time increase
Solution Approach 1:
The patent changes the material parameters by using non-corrugated paperboard with specific grammage (100-380 g/m²) and thickness (6-17 pts) to achieve protective strength without the complexity of corrugated structures. The folding pattern creates structural strength through geometry rather than material corrugation.
Solution Approach 2:
The patent creates a composite structure by folding a single paperboard sheet into multiple layers (at least five layers per wing) that work together to provide protective strength, eliminating the need for corrugated cardboard while maintaining or exceeding protective capabilities.
2Reliability
If protective corners are made from multiple sheets of non-corrugated paperboard, then material cost is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple functions into a single paperboard sheet by folding it into a multi-layered structure that provides both the corner body and protective wings in one continuous piece, eliminating the need to manipulate and assemble multiple separate sheets.
Solution Approach 2:
The patent segments the single paperboard sheet into functional zones through folding patterns that create distinct regions: the corner body, the wings, and nested side edges, all from one continuous sheet without requiring assembly of separate components.
3Strength
If multiple paper sheets are wrapped around an L-shaped core member, then protective corner strength is achieved, but production time increases
Solution Approach 1:
The patent performs preliminary action by pre-folding the single paperboard sheet into the final multi-layered wing structure before application, eliminating the need for on-site manipulation and wrapping around core members during assembly.
Solution Approach 2:
The folded paperboard structure is self-supporting and self-protective, with the nested side edges and multi-layered wings providing structural integrity without requiring core members or additional assembly steps to achieve corner strength.
4Ease of manufacture
If a single paperboard sheet is folded into multiple layers, then manufacturing simplicity is improved, but material thickness requirements increase
Solution Approach 1:
The patent applies nesting by folding the paperboard sheet into multiple layers where each layer is nested within the previous fold, creating a compact multi-layered structure (at least five layers per wing) that achieves required thickness through folding rather than using a single thick sheet.
Solution Approach 2:
The patent transitions from a two-dimensional flat sheet to a three-dimensional multi-layered structure through systematic folding, creating thickness in the Z-dimension while maintaining manufacturing simplicity through planar folding operations.
Data Source
AI summary
A paperboard protective corner and a method for manufacturing a paperboard protective corner, the paperboard protective corner comprising: a corner body made of a single paperboard sheet comprising first and second side edges, the single paperboard sheet being folded onto itself to form the paperboard protective corner, the single paperboard sheet including a plurality of folds, both the first and second side edges being received in a corresponding fold so as to be unexposed to an exterior of the paperboard protective corner.