Retractable Banner Fabric for Dimensional Stability and Smooth Deployment
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Solution Overview
Problem
Conventional retractable banner assemblies using rollable fabrics suffer from dimensional instability, leading to fabric distortions such as sagging, rippling, buckling, and curling, which hinder smooth deployment and impair the ability to impart aesthetically pleasing communications, especially when deployed over extended distances.
Innovation Solution
A retractable banner assembly with a rollable fabric having high flexural rigidity and low areal density, designed to minimize distortions and ensure smooth rolling and unrolling, with a sufficiently continuous surface for high-quality printing and capable of being interconnected to define pathways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional rollable fabric is used in retractable banner assemblies, then the fabric can be easily manufactured and installed, but the fabric exhibits dimensional instability leading to sagging, rippling, buckling, and curling distortions
Solution Approach 1:
The patent applies parameter changes by modifying the fabric's physical properties through specific weight (0.5-2.0 oz/yd²) and tensile strength requirements (10-50 lbs in warp direction, 5-25 lbs in fill direction). These parameter specifications transform the fabric from a conventional unstable material to one with controlled dimensional stability, eliminating sagging and rippling while maintaining the ability to roll and unroll smoothly.
Solution Approach 2:
The patent employs composite materials by combining the fabric with a rigid support structure consisting of a rod, housing, and spring mechanism. This composite system integrates the flexible fabric with rigid structural elements, providing the necessary support to prevent fabric distortions while maintaining the retractable functionality. The spring mechanism acts as a tensioning element that keeps the fabric taut during deployment.
2Weight of moving object
If the fabric is made lighter to reduce weight, then ease of rolling and deployment improves, but fabric strength and stability decrease
Solution Approach 1:
The patent resolves this contradiction through precise parameter specification, defining fabric weight within the range of 0.5-2.0 oz/yd² and tensile strength within 10-50 lbs in the warp direction and 5-25 lbs in the fill direction. These optimized parameters ensure the fabric is light enough for easy rolling and deployment while maintaining sufficient strength to resist tearing and maintain stability when deployed over extended distances.
3Area of stationary object
If the banner is deployed over extended distances, then coverage area increases, but fabric distortions and unevenness increase
Solution Approach 1:
The patent uses a composite structure combining the fabric banner with a rigid rod support system and spring tensioning mechanism. This composite construction provides structural integrity over extended deployment distances, preventing the fabric from sagging or developing excessive distortions. The rod acts as a rigid backbone while the spring maintains appropriate tension, enabling the banner to span larger areas while maintaining surface uniformity.
Solution Approach 2:
The patent specifies optimized fabric parameters including weight (0.5-2.0 oz/yd²) and tensile strength (10-50 lbs warp, 5-25 lbs fill) that are specifically tuned to maintain dimensional stability over extended deployment distances. These parameter changes ensure the fabric can span greater areas without developing excessive sagging or rippling.
4Ease of operation
If fabric with higher dimensional stability is used, then deployment smoothness improves, but manufacturing complexity increases
Solution Approach 1:
The patent achieves deployment smoothness through parameter changes by specifying fabric weight (0.5-2.0 oz/yd²) and tensile strength ranges that optimize both dimensional stability and manufacturability. These parameters ensure the fabric is stable enough for smooth deployment while remaining compatible with conventional fabric manufacturing processes, avoiding excessive manufacturing complexity.
Data Source
AI summary
A retractable banner assembly and improved rollable fabric for use therein wherein the rollable fabric has improved dimensional stability to reduce fabric surface variances and which promotes the banner to smoothly roll and unroll and orient with sufficiently reduced unevenness on deployment, the assembly for use in residential, commercial, and public spaces, indoors and outdoors, to route persons and/or inhibit access to designated areas and effectively impart communications provided thereon.