Dispensing Closure With Flexible Valve Head for Leakage Control
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Solution Overview
Problem
Existing dispensing closures for containers with low viscosity fluent substances face challenges in clean and precise dispensing, often resulting in residual substance leakage and difficulty in controlling the flow, especially when dispensing individual drops or steady streams.
Innovation Solution
A dispensing closure with a flexible, resilient valve head featuring self-sealing slits and openable portions that respond to pressure differentials, positioned between inlet and outlet passages to facilitate controlled flow and minimize leakage, featuring a snap-fit engagement with the container and a transparent elongate outlet for visibility and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional closure body is used for dispensing low viscosity fluent substances, then the structure is simple, but residual substance leaks out of the passage after pressurization ceases
Solution Approach 1:
The patent employs a flexible membrane within the closure body that can deform under pressure differentials to open and close the passage. This flexible element creates a self-sealing mechanism that prevents leakage of low viscosity substances without requiring complex mechanical valve structures, thus resolving the contradiction between reliability and device complexity.
2Ease of operation
If the closure body passage is elongate for difficult-to-access target areas, then accessibility is improved, but control over dispensing flow and precision are reduced
Solution Approach 1:
The closure body incorporates a dynamic membrane that responds to pressure differentials to control the opening and closing of the passage. This dynamic element allows precise control over when and how the elongate passage opens, enabling accurate dispensing to difficult-to-access areas while maintaining control precision through the membrane's responsive behavior.
3Productivity
If the closure allows easy dispensing of fluent substance, then productivity is improved, but cleaning of the closure becomes more difficult
Solution Approach 1:
The patent designs the membrane and passage structure to allow residual substance to be easily removed or drained after dispensing. The membrane's flexibility and the passage geometry are configured to minimize substance accumulation, enabling quick cleaning and maintenance while preserving efficient dispensing performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise and controlled dispensing of fluent substances, minimizing residual leakage and facilitating easy cleaning, while allowing for ease of manufacture and assembly with reduced costs.
Implementation Method 1
The openable portions are movable from the closed configuration to an open configuration when the valve head portion is subjected to a pressure differential acting across the valve head portion
Implementation Method 2
a flexible, resilient valve head portion
Data Source
AI summary
A dispensing closure (40) for a container (44) of a fluent substance is disclosed. The closure includes a body (54) having an inlet portion (68) defining an inlet flow passage (74) for receiving the fluent substance from the container (44) and an elongate outlet portion (70) defining an outlet flow passage (78) for discharging the fluent substance. The closure (40) further has a valve (56) located within the body (54), across the inlet flow passage (74) and spaced axially inwardly of outlet flow passage (78) to define a chamber (216). The valve (56) has a flexible, resilient valve head portion (160) that has confronting, openable portions (212) movable from a closed configuration to an open configuration when the valve head portion (160) is subjected to a pressure differential acting across the valve head portion (160).