Flat File with Ricasso for Safe Film Peeling

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Solution Overview

Problem

Existing tools for peeling films from intermediate layers, such as shims, pose a risk to users due to their sharp edges and tips, leading to potential injuries.

Innovation Solution

A modified flat file with a file handle, tang, and blade featuring a one-sided or two-sided knife-like cutting bevel with a ricasso, eliminating sharp edges and allowing for safe film peeling without risk.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual tools such as knives are used for peeling films, then the peeling function is achieved, but the risk of injury due to sharp edges increases

Engineering Contradiction:

Improvepeeling functionVSAvoidinjury risk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The file blade is modified to have different surface qualities at different locations: the cutting bevel area maintains a ricasso (non-sharp region) for safety, while other areas retain the original file texture for structural integrity. This local differentiation allows the tool to perform peeling without creating sharp edges that could cause injury.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of creating a sharp edge for cutting (the conventional approach), the invention inverts the approach by deliberately creating a non-sharp ricasso region on the file blade. This inverted design maintains the peeling capability while eliminating the harmful sharp edge, thus solving the safety issue.

Inventive Principle:

Principle #13The other way round (Inversion)

2Object-affected harmful factors

If a flat file with cutting bevel and ricasso is used, then safety is improved, but the device complexity increases

Engineering Contradiction:

Improveinjury riskVSAvoidfile structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The file blade is segmented into distinct functional zones: the cutting bevel region and the ricasso region. This segmentation allows each zone to serve its specific purpose - the cutting bevel for peeling action and the ricasso for safety - while maintaining the overall simplicity of the file structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention changes the geometric parameters of the file blade by introducing a ricasso region with specific dimensions and positioning. This parameter modification creates the safety feature without fundamentally changing the file's basic structure, thus balancing safety improvement with minimal complexity increase.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10144075B2Flat file

Publication Date: 2018.12.04 GEORG MARTIN GMBH

AI summary

The object of the invention is a flat file which is suitable for lifting off films from intermediate layers.