Container Insert Over-Molding With Integrated Self-Venting Valves

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Solution Overview

Problem

Existing container inserts for closed loop dispensing systems require multiple parts, assembly time, and mechanical interactions for valve operation, and lack self-venting capabilities.

Innovation Solution

A method of simultaneously molding a plastic substrate portion and an over-molded portion to create a container insert with integrated bi-directional valves and a flexible valve, reducing parts count and enabling automatic self-venting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple separate parts are used to form the container insert, then the functionality and reliability are improved, but the assembly time and device complexity increase

Engineering Contradiction:

Improvefunctional reliabilityVSAvoidparts count

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple separate components (substrate portion, over-molded portion, bi-directional valves, and venting members) into a single integrated container insert through over-molding processes. This merging reduces the number of separate parts while maintaining all necessary functions including chemical resistance, sealing, and automatic venting capabilities.

Inventive Principle:

Principle #5Merging (Combining)

2Ease of manufacture

If multiple separate parts are assembled to form the container insert, then the manufacturing flexibility is improved, but the assembly time and productivity are reduced

Engineering Contradiction:

Improvemanufacturing flexibilityVSAvoidassembly time

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent incorporates bi-directional valves and venting members directly into the molded substrate portion before the over-molding process. This preliminary integration of critical components eliminates subsequent assembly steps and reduces overall manufacturing time while maintaining design flexibility.

Inventive Principle:

Principle #10Preliminary action

3Measurement precision

If mechanical interaction is required between the container insert and dispensing cap for valve operation, then the control precision is improved, but the ease of operation is reduced

Engineering Contradiction:

Improvevalve control precisionVSAvoidoperational simplicity

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent implements automatic self-venting functionality where the bi-directional valves and venting members automatically respond to pressure differentials without requiring mechanical actuation from the dispensing cap. The system self-regulates chemical flow and air venting based on internal pressure conditions, eliminating complex mechanical interactions.

Inventive Principle:

Principle #25Self-service

4Ease of manufacture

If conventional molding methods are used for the container insert, then the manufacturing process is simpler, but the manufacturing cost and assembly requirements increase

Engineering Contradiction:

Improveprocess simplicityVSAvoidassembly requirements

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent employs composite construction with a substrate portion made from chemical-resistant material and an over-molded portion made from elastomeric material. This composite approach allows each material to be optimized for its specific function (chemical resistance vs. flexibility and sealing) while being manufactured as an integrated component through sequential molding processes.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentEP3986801B1Method of forming a container insert for use in a closed loop dispensing system

Publication Date: 2025.08.27 LAIBLE RODNEY

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AI summary

A container insert is disclosed for use with a closed loop dispensing system. The container insert is press-fitted into the throat of a liquid container. The container insert is comprised of a plastic substrate portion and an over-molded portion. This invention is directed to the method of simultaneously molding the plastic substrate portion and the over-molded portion.