Segmented Sealing Ring Lid Assembly for Package Spouts

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Solution Overview

Problem

Existing lid assemblies for packages with spouts often fail to ensure correct sealing of the pouring outlet when the lid is closed, leading to potential leakage and contamination.

Innovation Solution

A modified lid assembly design that includes a sealing ring divided into multiple ring portions, ensuring correct alignment and engagement with the collar when the lid is closed, thereby guaranteeing a secure seal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a sealing ring is used to seal the pouring outlet, then sealing function is provided, but incorrect engagement with the collar occurs during lid movement compromising the seal

Engineering Contradiction:

Improvesealing reliabilityVSAvoidlid movement reliability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The sealing ring is divided into multiple separate sealing elements (first sealing element and second sealing element) that can independently engage with the collar. This segmentation ensures that at least one sealing element correctly engages with the collar during lid movement, preventing leakage while maintaining ease of operation.

Inventive Principle:

Principle #1Segmentation

2Ease of manufacture

If the lid assembly is simplified, then manufacturing cost is reduced, but sealing precision deteriorates

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidsealing alignment precision

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The sealing ring is segmented into multiple independent sealing elements, which can be manufactured separately and then assembled. This approach maintains manufacturing simplicity while improving sealing precision, as the segmented elements can independently find their correct engagement position on the collar.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the sealing structure have different properties - the sealing elements are designed with specific local characteristics to engage with corresponding features on the collar, ensuring precise sealing alignment without requiring high precision throughout the entire lid assembly.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12234063B2Lid assembly for a package, lid-spout group for a package and package having a lid-spout group

Publication Date: 2025.02.25 TETRA LAVAL HOLDINGS & FINANCE SA

AI summary

A lid assembly comprises a coupling ring, a lid and a connecting unit connecting the lid to the coupling ring. The lid comprises a cover wall configured to cover a pouring outlet and a sealing ring protruding away from the cover wall and configured to interact with a collar carrying the pouring outlet to seal the pouring outlet. The sealing ring comprises at least a first ring portion and a second ring portion. The first ring portion comprises a first end spaced apart from the cover wall and the second ring portion comprises a second end spaced apart from the cover wall. A first distance of the first end from the cover wall with respect to a normal axis of the cover wall is greater than a second distance of the second end from the cover wall with respect to the normal axis.