Recessed Cutting Guide for Stable Seam Allowance Positioning

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Solution Overview

Problem

Conventional cutting guides wobble or pivot on raised areas of materials, leading to irregular cuts and uncertain placement, as they lack a mechanism to securely engage with seam allowances and provide stable guidance.

Innovation Solution

A cutting guide with a recess of sufficient dimension to receive a seam allowance, allowing for stable engagement and fixing the guide's location relative to the material, thereby preventing wobbling and ensuring uniform cutting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a conventional cutting guide with a flat surface is used, then the guide can be simple in structure and easy to manufacture, but the guide wobbles or pivots on raised areas of material resulting in unstable positioning

Engineering Contradiction:

Improvestable positioningVSAvoidguide structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The cutting guide incorporates a recessed portion with specific geometric characteristics (depth, width, length) that differ from the flat surface. This localized structural variation allows the guide to accommodate raised areas and seam allowances on material, providing stable positioning without requiring complete redesign of the entire guide structure.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of making the cutting guide surface convex or elevated to clear raised areas, the invention inverts the approach by creating a recessed portion that receives and accommodates the raised areas and seam allowances. This inversion allows the flat portions of the material to contact the flat surfaces of the guide, ensuring stable positioning.

Inventive Principle:

Principle #13The other way round (Inversion)

2Measurement precision

If visible marks are used to determine placement of the cutting guide, then the guide structure remains simple, but the placement location is uncertain and the guide may move from the intended location

Engineering Contradiction:

Improveplacement accuracyVSAvoidguide structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The recessed portion of the cutting guide serves a dual function: it accommodates raised areas and seam allowances for stable positioning, and simultaneously provides reference surfaces (opposed sides of the recess) that define the precise placement location. The guide structure itself provides the measurement reference, eliminating the need for separate visible marks.

Inventive Principle:

Principle #25Self-service

3Ease of operation

If the cutting guide engages the material on a raised area or seam, then placement may be simplified, but the guide moves or pivots resulting in irregular cuts and safety hazards

Engineering Contradiction:

Improvecutting uniformityVSAvoidguide stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The recessed portion acts as an intermediary structure that receives and isolates the raised areas and seam allowances from the cutting operation. By accommodating these irregularities within the recess, the guide ensures that the cutting edge engages only with flat, stable portions of the material, preventing pivoting and ensuring uniform cuts.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10041206B2Cutting guide with seam allowance recess

Publication Date: 2018.08.07 THOMAS PAUL

AI summary

A cutting guide having a seam allowance recess and methods of cutting a piece of material with such cutting guide.