Carton Handle Panel Segmentation for Force Distribution
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Solution Overview
Problem
Existing carton designs with handles, such as those in EP 341089 A2 and US 5639017 A, do not effectively distribute the force of lifting and carrying, leading to uneven stress on the carton ends, which can result in structural instability and potential damage during handling.
Innovation Solution
A carton design featuring a handle formed by overlapping panels with strategically placed tear lines and fold lines, allowing for even force distribution across a larger area, and incorporating a single-ply central handle panel with two-ply end portions for enhanced strength and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a handle is added to the carton for ease of carrying, then ease of operation is improved, but structural integrity may deteriorate due to concentrated stress at the handle attachment points
Solution Approach 1:
The handle is segmented into multiple panels (first handle panel, second handle panel, third handle panel) distributed across different carton surfaces. This segmentation distributes the lifting force across multiple attachment points rather than concentrating it at a single location, thereby maintaining structural integrity while providing ease of carrying.
Solution Approach 2:
Different regions of the carton are assigned different structural qualities to handle the handle integration. The end panels and top panels have reinforced structures specifically at the handle attachment zones, while other regions maintain their original design. This localized reinforcement strengthens the handle attachment points without adding unnecessary complexity elsewhere in the carton structure.
2Strength
If the handle is formed using multiple panels and tear lines, then force distribution is improved, but device complexity increases
Solution Approach 1:
The handle structure merges multiple functions into a single integrated design. The first, second, and third handle panels are all part of one continuous handle system that provides both structural reinforcement and lifting functionality. The tear lines serve dual purposes: they define the handle boundaries and provide controlled separation points for opening the carton after use.
Solution Approach 2:
The handle panels serve multiple functions: they reinforce the carton structure at critical stress points, provide the lifting mechanism for easy carrying, and define the opening path through the tear lines. This multi-functionality reduces the need for separate structural reinforcement elements, thereby managing complexity while achieving good force distribution.
3Strength
If the handle panels are made with two-ply construction at end portions, then strength is improved, but manufacturing complexity increases
Solution Approach 1:
The two-ply construction is applied locally only at the end portions of the handle panels where the highest stress concentrations occur during lifting and carrying. The central portions of the handle panels maintain single-ply construction. This localized multi-ply approach strengthens the critical areas without significantly increasing overall manufacturing complexity or material usage.
Data Source
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Figure 3A~3D
AI summary
A carton for containing a plurality of articles. The carton comprises a first top panel, a second top panel, a bottom panel, a first side panel, and a second side panel. A handle comprises a first handle panel and a second handle panel. The first handle panel comprises a central portion in the top panel and an end portion in a first top end flap. The second handle panel comprises a first portion in the second top panel and a second portion in a second top end flap. The central portion of the first handle panel is attached to the first portion of the second handle panel and the end portion of the first handle panel is attached to the second portion of the second handle panel.