Manual Tensioning Assembly for Expandable Slit Sheet Cushioning
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Solution Overview
Problem
Current packing materials, such as plastic packing peanuts and bubble wrap, pose ecological and logistical challenges due to non-biodegradability, bulkiness, and inefficient dispensing mechanisms, which lead to damage during shipping and storage issues.
Innovation Solution
A portable, lightweight dispensing system that uses a box with a tensioning assembly to expand eco-friendly slit sheet paper materials, allowing for manual expansion and dispensing of interleaf and expandable sheet materials, providing a cushioning wrap that is easy to use and space-efficient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional electric powered dispensing machines are used to expand and dispense slit sheet packing material, then the material can be expanded and dispensed, but the machine requires large table space and vertical space, and is heavy and difficult to move
Solution Approach 1:
The patent replaces the electric powered mechanical expansion system with a manual tensioning assembly that uses a reel and tensioning members to expand the slit sheet material. This substitution eliminates the need for heavy electric motors and power systems, making the dispensing device lightweight and portable while maintaining the core functionality of material expansion and dispensing.
Solution Approach 2:
The tensioning assembly is designed to be manually operated by the user, who directly controls the expansion of the slit sheet material by pulling on the free end. This self-service approach eliminates the need for external power sources and complex mechanical systems, further reducing weight and simplifying the overall device structure.
2Extent of automation
If electric powered dispensing machines are used, then material expansion is automated, but the machine is heavy and cannot be easily moved
Solution Approach 1:
The patent replaces automated electric expansion mechanisms with a manual tensioning system that uses a reel and tensioning members to achieve material expansion. This substitution maintains the essential automation of material delivery while eliminating heavy components, enabling portability without completely sacrificing operational convenience.
Solution Approach 2:
The tensioning assembly applies localized tension through tensioning members that engage with specific portions of the slit sheet material, creating expansion only where needed. This localized approach allows for effective material dispensing with minimal mechanical complexity, supporting both automation and portability.
3Device complexity
If guide wheels contact only a small portion of the material on one side, then the dispensing mechanism is simple, but the expansion of the slit sheet material becomes uneven
Solution Approach 1:
The tensioning assembly uses multiple tensioning members distributed across the width of the slit sheet material, rather than a single contact point. This segmentation allows each tensioning member to independently control the expansion of its corresponding section, ensuring uniform expansion across the entire material width while maintaining relative simplicity in the overall design.
Solution Approach 2:
The patent transitions from one-dimensional contact (single line of guide wheels) to two-dimensional distribution of tensioning members across the material width. This dimensional change allows for more uniform expansion control without significantly increasing device complexity, as the tensioning members can be简单地 arranged in a pattern across the material surface.
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 offers a biodegradable, space-efficient, and user-friendly solution for cushioning wrap material dispensing, reducing the risk of damage during shipping and storage while minimizing ecological impact.
Implementation Method 1
The rotational resistance of the roll of expandable sheet material causes the expandable sheet material to expand in thickness and length as it is pulled with the interleaf material by a user
Data Source
Figure 1A~1B
Figure 1C
Figure 2
AI summary
An apparatus for dispensing cushioning wrap material includes a box having a dispensing opening in communication with an interior of the box. A roll of interleaf material is rotatably positioned within the box such that a free end of the interleaf material can extend through the dispensing opening, and a roll of expandable sheet material in an unexpanded form is rotatably positioned within the box adjacent the first roll of sheet material such that a free end of the expandable sheet material can extend through the dispensing opening. A tensioning assembly is operably associated with the roll of expandable sheet material to control rotational resistance thereof. The interleaf material and the expandable sheet material can be concurrently pulled out of the box in abutting contact by a user and the rotational resistance of the roll of expandable sheet material causes the expandable sheet material to expand in thickness and length.