Expandable Slit Sheet Paper Expansion System With S-Shaped Roller Path
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing expansion systems for slit sheet materials often result in crushing, reducing the effectiveness of the expanded sheet as a cushioning material due to the compression caused by vertically aligned hook and loop rollers.
Innovation Solution
A novel expansion system with an S-shaped path for the slit sheet paper, where the paper is weaved between two expansion rollers without pinching or compression, ensuring the rollers are separated by a distance greater than the sheet's thickness to prevent damage, and the rollers include hooks around their periphery to engage the slits, allowing for expansion without crushing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If vertically aligned hook and loop rollers are used to expand slit sheet material, then the expansion function is achieved, but the sheet is crushed and its cushioning effectiveness is reduced
Solution Approach 1:
The patent transitions from vertical roller alignment to horizontal roller alignment, changing the spatial dimension of the expansion mechanism. This dimensional shift allows the sheet to expand horizontally between rollers rather than being compressed vertically, eliminating crushing while maintaining expansion functionality
Solution Approach 2:
The expansion process is divided into multiple sequential stages using multiple rollers arranged horizontally. The sheet passes through each roller pair in sequence, with each pair providing controlled expansion at a different location, preventing concentrated compression forces that cause crushing
2Device complexity
If rollers are placed close together to compact the expansion process, then device complexity is reduced, but the sheet thickness exceeds the available space causing damage
Solution Approach 1:
The patent resolves the space constraint by arranging rollers horizontally rather than vertically stacking them. This dimensional reconfiguration provides sufficient separation distance between rollers without increasing the vertical footprint of the device, accommodating thick expanded sheets while maintaining a compact overall structure
3Manufacturing precision
If hooks are added to rollers to engage slits, then expansion control is improved, but the risk of pinching and damaging the sheet increases
Solution Approach 1:
The patent applies hooks selectively on only one side of each roller rather than both sides, creating asymmetric engagement. This local application of hook features provides sufficient expansion control through unilateral engagement while eliminating the pinching risk that would result from bilateral hook engagement compressing the sheet
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 system effectively expands the slit sheet material without causing damage, maintaining its integrity and effectiveness as a cushioning material by avoiding compression and ensuring proper tension to prevent slippage.
Implementation Method 1
the at least two expansion rollers including two adjacent expansion rollers arranged to adjacent one another, at least one of the two adjacent expansion rollers including a plurality of hooks distributed around a periphery thereof which are configured to engage slits of the expandable slit sheet material
Data Source
AI summary
In some illustrative embodiments of the present invention, a novel expandable slit paper expansion device design is provided that, among other things, avoid complications of prior systems and eliminates the crushing effect of the rollers. Among other things, the preferred embodiments provide a unique structure that provides a novel “S” shape path of the expandable slit sheet paper, such that the expandable slit sheet paper is tortuously weaved between at least two expansion rollers without being compressed there-between, in a manner that the expandable slit sheet paper follows along surfaces of the expansion rollers without pinching or compression that occurs in the background art.