Quilting Ruler with Removable Friction Coating
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Solution Overview
Problem
Conventional quilting rulers with smooth surfaces, such as acrylic, fail to effectively prevent fabric slipping during measurement, marking, or cutting, requiring excessive pressure and often result in cumbersome or damaging stabilization methods.
Innovation Solution
A removable, flexible rubberized coating with a high coefficient of friction is applied to the ruler's bottom surface, which cures at room temperature and can be easily peeled off, providing consistent grip without damaging the fabric and allowing for customizable friction resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a smooth acrylic ruler surface is used, then the ruler is transparent and easy to manufacture, but the fabric slips easily requiring excessive pressure
Solution Approach 1:
The patent combines a rigid transparent acrylic ruler base with a flexible rubberized coating layer to create a composite structure. The acrylic provides transparency, rigidity, and ease of manufacture, while the rubberized coating provides high friction and fabric stability. This composite material approach resolves the contradiction by integrating the advantages of both materials without sacrificing either manufacturing ease or fabric stability.
Solution Approach 2:
The patent applies a thin flexible rubberized coating film onto the rigid acrylic ruler surface. This thin film provides the necessary friction and fabric grip while maintaining the transparency and structural integrity of the underlying acrylic ruler. The flexible coating conforms to the ruler surface and can be applied as a removable layer, solving the contradiction between smooth transparent surface and fabric stability.
2Reliability
If pressure is applied through the ruler to prevent fabric slipping, then fabric movement is reduced, but the ruler becomes difficult to use for simultaneous measurement and marking
Solution Approach 1:
The patent replaces the mechanical solution of applying pressure through the ruler with a friction-based solution. The rubberized coating creates high friction between the ruler and fabric surfaces, preventing fabric slipping without requiring the user to apply excessive pressure. This substitution of the stabilization mechanism allows the ruler to remain easy to operate for measurement and marking while maintaining fabric stability.
3Reliability
If permanent stabilization features are added to the ruler, then fabric grip is improved, but the ruler becomes cumbersome and may damage the fabric
Solution Approach 1:
The patent uses a thin flexible rubberized coating instead of permanent rigid stabilization features like handles, rubber feet, or protruding pins. This thin film provides fabric grip across the entire ruler surface without adding bulk or complexity to the ruler structure. The flexible coating is removable and does not interfere with the ruler's transparency or marking capabilities, avoiding fabric damage while maintaining simplicity.
Solution Approach 2:
The rubberized coating can be applied as a removable, replaceable layer that does not permanently modify the ruler. If the coating becomes worn or contaminated, it can be peeled off and replaced without affecting the underlying ruler structure. This approach avoids the complexity of permanent stabilization features while providing reliable fabric grip throughout the ruler's lifecycle.
4Reliability
If a high friction coating is applied to the ruler, then fabric slipping is prevented, but the coating may interfere with visibility through the ruler
Solution Approach 1:
The patent applies a thin rubberized coating layer that is transparent or translucent, allowing light to pass through the ruler and fabric for visibility. The thin film provides high friction for fabric stability while maintaining optical transparency. The coating thickness is controlled to be sufficient for friction but thin enough not to significantly block light transmission, resolving the contradiction between grip and visibility.
Solution Approach 2:
The patent selects a rubberized coating material that combines high friction properties with optical transparency. This composite material approach allows the coating to provide fabric stability through friction while simultaneously maintaining visibility through the ruler. The specific material selection balances the conflicting requirements of grip and transparency.
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 coating effectively minimizes fabric movement during use, reducing the need for excessive pressure and allowing for adjustable grip, enhancing usability and visibility while maintaining transparency and flexibility.
Implementation Method 1
a rubberized material which can cure at room temperature and under ambient lighting to form a coating with a coefficient of friction that is higher than that of the rigid ruler base, resisting the movement of the fabric
Data Source
AI summary
A device for measuring fabric and methods of making the device in accordance with the present disclosure are primarily characterized by a substantially rigid translucent base material and a flexible removable coating which resists the movement of the fabric. The removable coating is applied in liquid form, such as through spraying, and can cure at room temperature and under ambient lighting. The removable coating may be configured to be selectively removable, such that a user may selectively modify the degree to which the base removable coating resists movement of the fabric. In one embodiment, the liquid form of the removable coating is sprayed through a template so as to cure into a plurality of separately removable sections.