Transparent Application Container for Airtight Material Visibility

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Solution Overview

Problem

Existing application containers face issues with maintaining hygiene and airtightness, particularly when using volatile drawing materials, due to movable parts that can allow foreign matter entry and compromise internal airtightness.

Innovation Solution

The application container features a fixed inner tubular member with a transparent portion and a rotatable push rod, allowing visual inspection of the remaining material through a through hole, ensuring airtightness and reducing foreign matter entry.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a movable remaining amount display portion is used to indicate material level, then the remaining amount can be visually checked, but foreign matter such as dust can enter through the window portion and accumulate on the inner side

Engineering Contradiction:

Improvevisual checking of remaining amountVSAvoidforeign matter entry and dust accumulation

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the harmful function of the movable display portion by replacing it with a fixed display structure. The window portion is made transparent to allow visual checking, while the display portion is fixed to prevent foreign matter entry, thus separating the viewing function from the problematic movable mechanism.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of making the display portion movable to achieve visual indication, the patent inverts the approach by making the window transparent and the display portion fixed. The visual indication is achieved through the transparent window showing the fixed display portion's position, rather than through movement.

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of operation

If a through hole is formed in the outer tubular member for visual inspection, then the remaining material can be seen, but airtightness may be compromised allowing volatile drawing material to escape

Engineering Contradiction:

Improvevisual inspection of remaining materialVSAvoidairtightness

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent uses a transparent window portion that acts as a flexible barrier. This thin film structure allows visual inspection while maintaining airtightness, as the transparent material can seal the opening while still permitting light transmission for viewing the remaining material.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The transparent window portion serves as an intermediary element between the internal container and the external environment. It mediates the need for visual inspection while preserving airtightness, allowing light to pass through without allowing material exchange between inside and outside.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12595113B2Application container

Publication Date: 2026.04.07 TOKIWA CORP

AI summary

An application container includes a leading tube, an outer tubular member, an inner tubular member fixed to the outer tubular member, and a push rod that advances within the inner tubular member and pushes the drawing material, so that a drawing material comes out from an opening of the leading tube. The outer tubular member has a through hole formed in a side surface of the outer tubular member. At least a part of the inner tubular member that is exposed from the through hole is a transparent portion through which the inside of the inner tubular member is visible. The push rod includes a visible portion that is visible from the outside of the inner tubular member through the transparent portion.