Carton Handle Structure with Diagonal Severance Lines
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Solution Overview
Problem
Existing carton designs for multi-packs face challenges in minimizing material usage while ensuring strength and durability for transporting large weights, and often lack efficient carrying handles for consumer convenience.
Innovation Solution
A carton design featuring a top wall with a handle structure, including hand apertures, primary and branch fold lines, and diagonal severance lines, which allows for efficient folding and reinforcement to handle stress loads, while providing a carrying handle for user convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a carrying handle is added to the carton for consumer convenience, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The handle structure is segmented into multiple functional components: hand apertures for finger insertion, primary fold lines for forming the handle arch, branch fold lines for creating support structures, and diagonal severance lines for material reinforcement. This segmentation allows each element to perform its specific function efficiently while contributing to the overall handle functionality.
Solution Approach 2:
The handle structure utilizes the third dimension by forming an arched configuration through primary fold lines that create vertical elevation. The branch fold lines extend in multiple directions from the primary fold line, creating a three-dimensional support framework that provides both structural integrity and carrying functionality without requiring additional lateral space.
2Loss of substance
If material usage is minimized for cost and environmental considerations, then loss of substance is reduced, but strength decreases
Solution Approach 1:
The diagonal severance lines are strategically positioned to provide localized reinforcement at critical stress points in the carton structure. Rather than uniformly thickening the entire carton, the reinforcement is concentrated where mechanical stresses are highest, particularly at the corners and along the handle structure, optimizing strength-to-material ratio.
Solution Approach 2:
The handle structure employs a composite configuration combining multiple fold line types (primary, branch, and diagonal severance lines) within a single integrated design. This composite approach allows different regions of the same material to serve different functions: some areas provide flexibility through fold lines, while others provide rigidity through severance line patterns, achieving high strength with minimal material.
Data Source
AI summary
Aspects of the disclosure relate to a carton (90) for packaging one or more articles(IO) and to a blank (10) for forming the carton. The carton comprises a plurality of panels (12,14,16,18,20,22) for forming walls of the carton including: a top wall, a bottom wall, a pair of side walls and a pair of end walls. The top wall (14,22) comprises a handle structure (H). The handle structure comprises at least one hand aperture (A1,A2) defined in the top wall. At least one primary fold line (39a,39b,49a,49b) is formed in the top wall and extends from a region of the at least one hand aperture towards at least one of the corners of the top wall. A diagonal severance line (47a, 47b, 57a, 57b) is formed in the top wall inwardly of and spaced from the at least one corner for separating the at least one primary fold line from the at least one corner.