Packaging Blank Crease Layout to Prevent Wild Crease Lines

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Solution Overview

Problem

Existing packaging blanks for pourable products are prone to the formation of wild crease lines during the packaging process, which can compromise the integrity and quality of the final package.

Innovation Solution

The packaging blank design incorporates specific crease line configurations, where first and third transversal crease lines are positioned further from the longitudinal edges, reducing the risk of wild crease line formation and enhancing package formation precision.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If crease lines are positioned closer to the longitudinal edges for efficient package formation, then package formation speed is improved, but wild crease lines form compromising package integrity

Engineering Contradiction:

Improvepackage formation speedVSAvoidpackage integrity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies local quality by differentiating the positioning of crease lines based on their location. First and third transversal crease lines are positioned at a greater distance from the longitudinal edges, while second transversal crease lines are positioned closer. This localized differentiation prevents wild crease formation at critical edge areas while maintaining efficient package formation in central areas.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The crease line pattern is segmented into multiple transversal crease lines (first, second, and third) with different positioning strategies. This segmentation allows the packaging blank to have different crease line configurations in different regions, preventing wild creases while maintaining formation efficiency.

Inventive Principle:

Principle #1Segmentation

2Device complexity

If standard crease line positioning is used for simplicity, then manufacturing complexity is reduced, but package formation precision deteriorates

Engineering Contradiction:

Improvecrease line configuration complexityVSAvoidpackage formation precision

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The invention implements local quality by applying different positioning rules to different crease lines. The first and third transversal crease lines are positioned at a first distance from longitudinal edges, while second transversal crease lines are positioned at a second distance. This localized differentiation enhances package formation precision without requiring complete redesign of the entire crease pattern.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250388358A1Packaging blank for forming a package and package formed from a packaging blank

Publication Date: 2025.12.25 TETRA LAVAL HOLDINGS & FINANCE SA

AI summary

There is described a packaging blank comprising a first longitudinal boundary edge, a second longitudinal boundary edge, a first transversal boundary edge and a second transversal boundary edge. The packaging blank also comprises a top crease pattern having a first transversal crease line and a second transversal crease line and a bottom crease pattern having a third transversal crease line and a fourth transversal crease line. The second transversal crease line is closer to the first longitudinal boundary edge and/or to the second longitudinal boundary edge than the first transversal crease line and/or the fourth transversal crease line is closer to the first longitudinal boundary edge and/or the second longitudinal boundary edge than the third transversal crease line.