Paper Container Sidewall Shaping for Stackability
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Solution Overview
Problem
Existing containers, such as cups, suffer from poor stackability due to lack of structural features that prevent them from being easily separated and stacked without being pushed together too tightly.
Innovation Solution
A container with a cylindrical or conical sidewall made from paper or cardboard material, featuring a rolled rim and compressed shapings that extend partially over the perimeter, providing a first portion inwardly and a second portion outwardly, which are compressed to create a flat profile for enhanced rigidity and insulating properties, and can be heat-sealed for improved resistance to liquids and vapors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional container designs are used, then manufacturing is simple, but stackability is poor
Solution Approach 1:
The sidewall shaping is divided into multiple functional portions: an inwardly extending portion that provides a stacking surface for the container below, and an outwardly extending portion that provides a stacking surface for the container above. This segmentation allows each portion to serve a specific stacking function, improving overall stackability without requiring completely separate components.
Solution Approach 2:
The shaped portion of the sidewall serves multiple functions simultaneously: it provides structural reinforcement to prevent container deformation, creates form-fit connections for stacking, and defines stacking surfaces for both upper and lower containers. This multi-functionality improves stackability while avoiding the need for additional separate stacking mechanisms.
2Loss of substance
If the sidewall is made thinner to reduce material usage, then material consumption decreases, but structural integrity deteriorates
Solution Approach 1:
The sidewall features localized shaped portions with increased thickness and structural complexity only where needed for stacking support and structural reinforcement. The rest of the sidewall can maintain thinner walls to reduce material usage. This local quality enhancement provides structural integrity at critical locations without requiring increased material consumption throughout the entire container.
Solution Approach 2:
The shaped portions of the sidewall create composite structural features where the folded or shaped material provides enhanced mechanical properties. The shaping creates layers and folds that act as reinforcement, similar to composite structures, providing increased strength and stiffness in critical areas without requiring additional material throughout the entire container wall.
3Temperature
If no insulation structure is provided, then manufacturing is simpler, but thermal insulation performance is poor
Solution Approach 1:
The shaped portions of the sidewall simultaneously provide structural reinforcement for stacking and create insulating air pockets. The folds and shapes trap air within the wall structure, providing thermal insulation without requiring separate insulation materials or layers. This multi-functionality improves thermal insulation performance while avoiding additional structural complexity.
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 solution enhances stackability by creating a form-fit connection between containers, allowing for easy separation and improved insulation, while maintaining structural integrity without excessive material usage, and providing a high-friction grip to prevent slipping.
Implementation Method 1
the shaping is compressed in its height such that it is essentially flat
Implementation Method 2
the shaping is compressed in its height such that it is essentially flat and that it has at least a first portion, which extends from the inner side of the sidewall and a second portion that extend from the outer side of the sidewall
Implementation Method 3
providing a high-friction grip to prevent slipping
Implementation Method 4
the surfaces of the parts of the container that are subjected to a liquid and/or vapor are preferably provided with means, especially a coating, an impregnation, a film or the like which makes these parts at least temporarily resistant against for example humidity, water, aqueous solutions, oil and/or fat
Implementation Method 5
the material can also comprise a heat sealable coating, especially on its inner side
Data Source
AI summary
A container having a bottom and a cylindrical or conical sidewall attached to the bottom, wherein the sidewall preferably comprises a rolled rim at its upper edge opposite to the bottom and is produced from a paper- or carton material, wherein at least a first shaping is provided into the sidewall in a first height, and wherein the shaping extends at least partially over the perimeter of the sidewall. A process for the production of a container with a bottom and a conical or cylindrical sidewall is also provided, wherein the bottom and the sidewall are made from a paper- or cardboard-material and a first circumferential shaping is inserted into the sidewall.