Scissors With Slit Blade for Thread Cutting and Tearing

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Solution Overview

Problem

Existing sewing scissors lack efficiency in handling various types of fabrics and stitching tasks, necessitating the development of scissors that enhance sewing or tailoring processes.

Innovation Solution

The design includes scissors with a first blade featuring a cutting edge and a slit extending toward the tip, and a second blade with a static edge to engage the cutting edge, allowing for efficient cutting and tearing of threads.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional sewing scissors are used, then the basic cutting function is provided, but the efficiency in handling various fabrics and stitching tasks is insufficient

Engineering Contradiction:

Improveefficiency in handling fabrics and stitching tasksVSAvoidability to handle various types of fabrics and stitching tasks

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The blade is segmented by introducing a slit that divides the blade into multiple functional zones. The slit creates separate regions for different cutting actions, allowing the blade to handle various fabric types and stitching tasks more effectively by providing specialized cutting zones for different purposes.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the blade are given different properties through the slit configuration. The slit creates distinct functional zones with different cutting characteristics, allowing each region to be optimized for specific fabric types or stitching requirements, thereby improving overall adaptability.

Inventive Principle:

Principle #3Local quality

2Manufacturing precision

If a slit is introduced in the blade, then precise cutting and tearing of threads is enabled, but the blade structure becomes more complex

Engineering Contradiction:

Improveprecision in cutting and tearing threadsVSAvoidblade structure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The slit is extracted as a separate structural feature from the main blade body. By introducing the slit as a distinct element that extends through a portion of the blade width, the design achieves precise cutting functionality while maintaining a relatively simple overall blade structure that can be manufactured efficiently.

Inventive Principle:

Principle #2Taking out (Extraction)

3Ease of operation

If the slit extends through a portion of the blade width, then thread tearing is facilitated, but the blade strength may be reduced

Engineering Contradiction:

Improveease of thread tearingVSAvoidblade strength

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The slit extends through only a portion of the blade width rather than the entire width. This partial action approach allows the slit to facilitate thread tearing while preserving sufficient blade material to maintain adequate strength. The slit provides enough functionality for thread manipulation without compromising the blade's structural integrity.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20250178222A1Scissors comprising a slit

Publication Date: 2025.06.05 MADE APPAREL SERVICES

AI summary

Scissors comprising a slit are disclosed. The scissors may be used to cut or tear thread. In one embodiment, for example, the scissors comprise a first blade having an outer edge and a cutting edge, a second blade having a static edge positioned to engage the cutting edge of the first blade, and a slit in the first blade. The slit in the first blade extends toward a tip of the first blade and through a portion of the width of the first blade without extending therethrough. In operation, the scissors can be used to release a material from a machine by cutting thread attaching the material to the machine.