Liner Packaging Separation Feature for Clean Portion Splitting

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Solution Overview

Problem

Existing packaging technologies lack effective separation features that allow for easy and clean separation of package portions without fiber tear and film overhang.

Innovation Solution

A packaging construct with a first partial cut on the underside of the flange panel and a second partial cut through the liner and lid, offset from the first cut, forming a separation feature that facilitates clean separation of package portions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a single partial cut is made in the package structure, then separation can be initiated, but incomplete separation occurs with fiber tear and film overhang

Engineering Contradiction:

Improveseparation easeVSAvoidseparation cleanliness

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The separation feature is divided into multiple segments: a first partial cut extending from the first surface and a second partial cut extending from the second surface. These segments work together to form a complete separation path, allowing the package to be separated cleanly into portions without fiber tear or film overhang.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The separation feature is implemented by cutting from both surfaces of the package (first surface and second surface) toward each other. This approach adds a dimensional aspect by utilizing both faces of the material, enabling complete separation without the defects associated with single-sided cutting.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If the package structure is made separable, then portion separation is enabled, but structural integrity is compromised

Engineering Contradiction:

Improveseparation capabilityVSAvoidstructural integrity

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The package structure is segmented into separable portions through the dual partial cuts, which create a controlled separation path. The separation feature allows the package to maintain integrity when closed while enabling clean division into portions when opened.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first and second partial cuts are pre-formed during package manufacturing, creating a separation feature that is ready for use. This preliminary action ensures that when separation is needed, it occurs cleanly along the predetermined path without compromising the overall structural integrity of the package.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20260035131A1Packaging construct with liner

Publication Date: 2026.02.05 GRAPHIC PACKAGING INTERNATIONAL LLC

AI summary

A packaging construct includes a panel having a first surface and an opposing second surface, at least a layer of material extending along the second surface of the construct, a first partial cut at least partially extending into the panel from the first surface, and a second partial cut extending through the layer of material and into the second surface of the panel, the first partial cut and the second partial cut cooperate to at least partially form a separation feature in the construct for facilitating separation between portions of the construct.