Multi-purpose Sewing Marker with Reversible Tracing Wheels
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Solution Overview
Problem
Seamstresses face inefficiencies in marking fabrics for sewing due to the need to switch between different marking tools, such as chalk and tracing wheels, which can be inconvenient and time-consuming.
Innovation Solution
A multi-purpose marking tool that integrates a chalk holder with both smooth and serrated tracing wheels, allowing for easy access and use of both types of markers without having to search for them, featuring a reversible disk holder and a sharpened edge for chalk sharpening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If seamstresses use multiple separate marking tools (chalk and tracing wheels), then each tool can perform its specific marking function, but the seamstress must switch between tools which is time-consuming and inefficient
Solution Approach 1:
The patent combines multiple marking tools (smooth tracing wheel, toothed tracing wheel, and chalk holder) into a single integrated marker device. The holder contains all three marking elements that can be accessed through different openings, eliminating the need to switch between separate tools and thereby improving marking efficiency while reducing time loss.
Solution Approach 2:
The marker device is designed as a multi-functional tool that can perform multiple marking operations (smooth lines, toothed lines, and chalk markings) through a single device. This universal design allows the seamstress to access all marking functions from one tool, resolving the contradiction between tool versatility and time efficiency.
2Illumination intensity
If conventional small diameter chalk (about 2.6 mm) is used, then the chalk fits in standard holders, but the markings have poor visibility
Solution Approach 1:
The patent changes the parameter of chalk diameter from the conventional 2.6 mm to a larger size (at least 4 mm, preferably 5.6 mm). This parameter change significantly improves marking visibility while the holder is specifically designed to accommodate this larger chalk size, managing the complexity through purposeful design adaptation.
3Ease of operation
If a single holder contains all marking tools, then all tools are readily accessible, but the holder design becomes complex with multiple components
Solution Approach 1:
The holder is segmented into multiple sections with different openings (first opening for smooth wheel, second opening for toothed wheel, third opening for chalk). Each marking tool is positioned in a dedicated section, allowing easy access while organizing the complexity into manageable segments rather than a monolithic structure.
Solution Approach 2:
The marking disks and chalk are nested within the holder structure. The reversible disk holder contains the tracing wheels, which can be inserted into and removed from the main holder body. This nesting approach consolidates multiple tools into a compact integrated device, improving accessibility while containing the complexity within a unified structure.
Data Source
AI summary
A marker ensemble includes a multi-purpose marking tool and a sharpener. The marking tool has a shell, retention sleeve, compression spring, control tab, reversible disk holder, and cap. The shell has an exit opening, an access opening with a mounting socket, and a medially located lateral control slot through which the control tab extends. The retention sleeve has a collet, compressed by the compression spring and uncompressed by the control tab. The disk holder has a body with a retention ridge and a pair of lugs extending from each end to retain a marking disk. One marking disk has a circular periphery and the other marking disk has a toothed periphery. The cap is mounted upon either end. The sharpener includes a blade with a sharpened edge secured to a body with an upper surface, a peripheral surface with a shoulder, waist, and hip, and a lower surface.