Peelable Lid Sealing With Frangible Zones for Easy-Open Containers

Solution Overview

Problem

Existing packaging technologies lack efficient methods for producing containers with peelable lids that provide a secure seal while allowing easy opening and closure, particularly in applications requiring freshness and integrity of contents.

Innovation Solution

A method of manufacturing a container with a peelable lid having a frangible seal involves providing a container body, aligning and sealing a lid flush against the rim, applying heat and pressure, and incorporating a pull tab for easy removal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a secure seal is applied to ensure freshness and integrity, then the sealing strength is improved, but the ease of opening deteriorates

Engineering Contradiction:

Improvesealing strengthVSAvoidease of opening

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The seal is divided into two distinct zones: a frangible seal portion that is intentionally weakened to allow easy breaking and opening, and a secure seal portion that provides strong adhesion for freshness preservation. This segmentation allows the same seal structure to provide both strong sealing and easy opening functions simultaneously.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the seal have different properties: the frangible portion has reduced bond strength for easy breaking, while the secure seal portion has enhanced adhesion for strong sealing. The pull tab is also designed with specific local properties to concentrate force at the break point, enabling controlled opening without compromising overall seal integrity during storage.

Inventive Principle:

Principle #3Local quality

2Ease of operation

If a frangible seal is implemented for easy opening, then the ease of operation is improved, but the sealing strength deteriorates

Engineering Contradiction:

Improveease of openingVSAvoidsealing strength

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The seal is divided into two distinct zones: a frangible seal portion that is intentionally weakened to allow easy breaking and opening, and a secure seal portion that provides strong adhesion for freshness preservation. This segmentation allows the same seal structure to provide both strong sealing and easy opening functions simultaneously.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the seal have different properties: the frangible portion has reduced bond strength for easy breaking, while the secure seal portion has enhanced adhesion for strong sealing. The pull tab is also designed with specific local properties to concentrate force at the break point, enabling controlled opening without compromising overall seal integrity during storage.

Inventive Principle:

Principle #3Local quality

3Ease of operation

If a pull tab is added for easy removal, then the ease of operation is improved, but the device complexity increases

Engineering Contradiction:

Improveease of openingVSAvoidstructure complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The pull tab is integrated directly into the lid structure rather than being a separate component. The tab is formed as an extension of the lid material itself, combining the lifting function with the existing lid geometry. This merging approach adds minimal structural complexity while providing significant ease of operation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The pull tab serves multiple functions: it provides a gripping surface for easy removal, acts as a stress concentrator to initiate controlled breaking at the frangible seal, and can serve as a visual indicator that the package has been opened. This multi-functionality reduces the need for additional separate components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

The method enables the production of containers with a peelable lid that ensures a secure seal while allowing easy opening and closure, maintaining content freshness and integrity.

Implementation Method 1

applying heat and pressure

Methodology Applied

Scientific EffectHeat: Heating

Implementation Method 2

applying heat and pressure

Methodology Applied

Scientific EffectPressure: Pressure Increase

Data Source

PatentUS12473128B2Method of manufacture for a highly peelable lid with a frangible seal

Publication Date: 2025.11.18 CAMBIO ROASTERS LLC

AI summary

The following disclosure describes a container with a peelable lid having a frangible seal and method of manufacture. The method includes providing a container body, receiving a lid, aligning and placing the lid flush against the rim of the container body, and sealing the lid to the container body. The method of manufacture produces a container with a peelable lid having a frangible seal, the container including a container body, a lid sealed to the rim of the open end of the container body, and a pull tab.