Edge Protector With Nested Wrap Plies for Corner Protection
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Solution Overview
Problem
Existing edge protectors manufactured by laminating multiple plies of paperboard lack structural integrity and effectiveness in protecting load corners during transit, as they are prone to damage and do not provide adequate corner protection.
Innovation Solution
An improved edge protector design featuring two plies wrapped around a core, with a method of manufacturing that includes attaching cores and wrap plies using adhesive, wrapping the plies to form transverse legs, and bending them to create a robust L-shaped structure that enhances corner protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple plies of paperboard are laminated together using adhesive and bent into an L-shaped member, then the edge protector can be manufactured with a basic protective structure, but the structural integrity and effectiveness in protecting load corners deteriorates
Solution Approach 1:
The patent implements a nested structure where an inner wrap ply is wrapped around a first core, and an outer wrap ply is wrapped around the inner wrap ply and first core. This nested arrangement creates multiple protective layers that enhance structural integrity while maintaining manufacturability through a systematic assembly process.
Solution Approach 2:
The edge protector combines multiple different materials including paperboard plies, adhesive materials, and potentially different core materials to create a composite structure. This composite approach allows each material to contribute its specific properties, resulting in enhanced overall strength and protective capability while maintaining ease of manufacture through standardized material components.
2Ease of manufacture
If a simple laminated structure is used, then the manufacturing process is simple, but the effectiveness in protecting load corners during transit deteriorates
Solution Approach 1:
The nested wrap ply structure provides redundant protection layers that enhance reliability during transit. The inner wrap ply provides primary protection while the outer wrap ply provides secondary protection, ensuring that corner protection effectiveness is maintained even if one layer is compromised.
Solution Approach 2:
The patent transitions from a simple planar laminated structure to a three-dimensional L-shaped structure with wrap plies extending around cores. This dimensional change creates a more volumetric protective form that better envelops and protects load corners, enhancing reliability without significantly complicating the manufacturing process.
3Ease of manufacture
If adhesive is used to attach plies together, then the plies can be assembled into an L-shaped structure, but the structural integrity and resistance to damage deteriorates
Solution Approach 1:
The nested wrap configuration creates multiple attachment interfaces between plies and cores, distributing the mechanical stresses across numerous bond lines. This multi-point attachment system enhances overall attachment strength and structural integrity while maintaining a relatively simple adhesive application process.
Solution Approach 2:
The adhesive attachment process is applied selectively at specific locations where plies meet cores and where wrap plies overlap. This localized quality approach concentrates bonding efforts at critical stress points, maximizing attachment strength where it is most needed while keeping the overall manufacturing process simple.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The improved edge protector provides enhanced corner protection by forming a robust L-shaped structure with integrated cores and plies, effectively preventing damage during transit and ensuring secure attachment to loads.
Implementation Method 1
attaching cores and wrap plies using adhesive
Data Source
AI summary
Various embodiments of the present disclosure provide an improved edge protector having two plies wrapped around a core and a method of manufacturing the improved edge protector.