Segmented Reinforced Pocket Folder Edge Design
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Solution Overview
Problem
Conventional pocket folders with reinforced edges face limitations in capacity and are prone to tearing when filled, as the reinforcement construction restricts pocket expansion and increases the risk of edge damage.
Innovation Solution
A one-piece blank for making a pocket folder with reinforced side edges and expandable pockets, featuring flaps and extensions with score lines to enhance strength and prevent tearing, allowing for uniform thickness and increased capacity without compromising the folder's ability to hold materials securely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforced edges are constructed using conventional methods, then the edge strength is improved, but the pocket capacity is limited and the edges are prone to tearing when filled
Solution Approach 1:
The reinforcement is divided into multiple segments: a primary reinforcement element extending along the edge and secondary reinforcement elements positioned at intervals. This segmentation allows the pocket to expand between reinforcement points while maintaining edge strength, preventing the tearing that occurs in conventional solid reinforcement designs.
Solution Approach 2:
Reinforcement is applied locally at critical points along the edge rather than uniformly across the entire edge. The reinforcement elements are strategically positioned to provide strength where needed while leaving the pocket area free to expand, resolving the contradiction between edge strength and tearing resistance.
2Volume of stationary object
If the pocket is made expandable to increase capacity, then the pocket volume is improved, but the edge reinforcement is compromised and tearing risk increases
Solution Approach 1:
The reinforcement system is segmented into discrete elements that can accommodate expansion. The primary reinforcement element with spaced secondary elements creates a pattern that allows the pocket to expand volumetrically while the reinforcement edges remain intact, preventing tearing during filling.
Solution Approach 2:
The reinforcement structure is designed to operate in a different dimensional plane than the pocket expansion. The reinforcement elements extend along the edge in one dimension while the pocket expands in another dimension, allowing both capacity increase and edge strength to coexist without compromising durability.
3Strength
If conventional reinforcement construction is used, then the edge strength is improved, but the pocket expansion is limited and capacity is reduced
Solution Approach 1:
The reinforcement is segmented into spaced-apart elements rather than continuous construction. This segmentation creates expansion channels between the reinforcement points, allowing the pocket to increase its volume while the reinforcement edges maintain their structural strength.
Solution Approach 2:
The reinforcement is applied locally at specific positions along the edge rather than uniformly. This localized reinforcement provides edge strength where needed while leaving the majority of the pocket area free to expand, thereby increasing capacity without sacrificing edge strength.
Data Source
AI summary
The pocket folder is made from a single sheet blank and has a pair of pockets and reinforced side edges. The pockets may be open pockets or one of the pockets may be closed while the other is open.