Threadless Snap-On Lid With Twist Release for Leak-Resistant Packaging

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Solution Overview

Problem

Existing food packaging containers with lids face challenges in achieving a secure, leak-resistant seal while being easy to open and close, and are often expensive to manufacture or require specialized tooling.

Innovation Solution

A container and lid design featuring mount means without threads, where the lid is coupled by snapping onto a brim and decoupled by rotating relative to the container, utilizing lid and container tabs with retainer bumps and ramps to facilitate easy application and removal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a snap-on lid with a tight seal is used, then leak resistance is improved, but ease of operation deteriorates as the lid becomes difficult to put on and remove

Engineering Contradiction:

Improveleak resistanceVSAvoidease of lid application and removal

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The lid and container are segmented with complementary tabs: container tabs with ramps and lid tabs with retainer bumps. The retainer bump engages with the ramp during rotation to provide mechanical advantage, allowing the lid to be securely attached yet easily removed by twisting.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mount means transitions from a static snap-fit to a dynamic system where rotation of the lid relative to the container activates the ramp and retainer bump interaction. This dynamic mechanism converts rotational motion into vertical lifting force, enabling easy lid removal while maintaining secure attachment during normal use.

Inventive Principle:

Principle #15Dynamics

2Reliability

If a screw-on lid is used, then leak resistance and security are improved, but manufacturing cost and device complexity increase due to specialized tooling and threaded components

Engineering Contradiction:

Improveseal securityVSAvoidmanufacturing cost and tooling requirements

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The threaded connection is extracted and replaced with a simpler tab-and-ramp mechanism. The container tabs and lid tabs are molded as integral parts of the container and lid respectively, eliminating the need for separate threading tools and specialized manufacturing equipment while maintaining secure attachment.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The mount means uses simple molded tabs and ramps that can be easily formed during standard plastic molding processes. These features are designed for single-use or limited-use applications, eliminating the need for expensive, durable threaded connections while achieving the required security for the application.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Ease of operation

If tabs and hinges are used for easy opening, then ease of operation is improved, but leak resistance deteriorates due to poor seal quality

Engineering Contradiction:

Improveease of openingVSAvoidseal quality

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The mounting and sealing functions are merged into a single integrated mechanism. The lid flange extends over the container brim to provide the seal, while the tabs and ramps work together to secure the lid. This combination ensures that easy opening via tab rotation does not compromise the seal integrity provided by the flange-over-brim configuration.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP4656545A1Package with leak resistant lid

Publication Date: 2025.12.03 REYNOLDS CONSUMER PRODUCTS LLC

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AI summary

The present disclosure teaches a package made up of a container (100) and a lid (200). The package includes mount means without threads for coupling the lid (200) to the container (100) with a tight seal and for decoupling the lid (200) from the container (100) via rotation of the lid (200).