Curved Edge Masking Sheet for Hair Treatment Conformance

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Solution Overview

Problem

Existing hair treatment masking methods fail to effectively conform to the curvature of the head, leading to inefficient application of cosmetic treatments on localized hair regions.

Innovation Solution

A masking sheet with curved edges that can conform to the head's curvature, made from various materials such as metallic foils, polymers, and papers, allowing for flexible application and containment of treatment compositions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a flat masking sheet is used for hair treatment, then the sheet is easy to manufacture and store, but it cannot conform to the curvature of the head, leading to inefficient application on localized hair regions

Engineering Contradiction:

Improveconformance to head curvatureVSAvoidmasking sheet geometry

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The masking sheet is designed with curved edges instead of straight edges, allowing it to conform to the curvature of the head and scalp. This curved geometry enables the masking sheet to adapt to the rounded surface of the head, improving application efficiency on localized hair regions while maintaining a relatively simple flat sheet structure that can be easily manufactured and stored.

Inventive Principle:

Principle #14Spheroidality (Curvature)

2Productivity

If a curved masking sheet is used to conform to head shape, then application efficiency on localized regions is improved, but the sheet becomes more complex to manufacture

Engineering Contradiction:

Improveapplication efficiencyVSAvoidmasking sheet fabrication

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The masking sheet incorporates curved edges that can be cut from standard rectangular sheets using simple cutting tools or dies. This approach allows the curved geometry to be achieved through straightforward manufacturing processes rather than complex forming operations, thereby maintaining ease of manufacture while gaining the productivity benefits of head-conforming shape.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The masking sheet can be designed as a modular component that is part of a larger hair treatment system. The curved masking sheet is one element in a sequence of steps that may include sectioning hair, applying treatment, and removing the mask. This segmentation allows each component to be optimized independently, simplifying the manufacturing of the curved sheet while achieving high overall application efficiency.

Inventive Principle:

Principle #1Segmentation

3Manufacturing precision

If the masking sheet does not conform to head curvature, then manufacturing is simpler, but treatment coverage uniformity is poor

Engineering Contradiction:

Improvetreatment coverage uniformityVSAvoidmasking sheet design

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The curved edges of the masking sheet are specifically designed to match the expected curvature of the head and scalp in the treatment area. This geometric adaptation ensures that when the masking sheet is applied, it maintains consistent contact with the curved surface, providing uniform treatment coverage across the localized hair region while keeping the overall sheet design relatively simple.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS8939160B2Masking device for cosmetic hair treatment

Publication Date: 2015.01.27 FALCUCCI ANGELA

AI summary

A masking sheet for hair coloring has first and second surfaces encompassed by first and second longitudinal edges and first and second transverse edges where the first and second transverse edges embody respective substantially convex curves.