Packaging Lid Arch-Shaped Resilient Strips Dimensional Tolerance
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Solution Overview
Problem
Existing packaging lids for powdered or granular food products are incompatible with containers having different peripheral dimensions due to manufacturing tolerances, limiting their use across varying container sizes.
Innovation Solution
A packaging lid with resilient elongate strips formed as arches on the inner side of the skirt, which compress and snap over an outwardly projecting ridge on the container, allowing for dimensional flexibility and secure mounting regardless of manufacturing variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lid is designed with rigid securing elements that require accurate dimensional matching, then the mounting security is improved, but the adaptability to containers with different dimensions deteriorates
Solution Approach 1:
The patent applies parameter changes by transforming the rigid securing elements into resilient members with elastic properties. The resilient members can deform elastically to accommodate dimensional variations in containers while maintaining secure mounting through their snap-fit engagement with the container rim
Solution Approach 2:
The patent employs flexible shells and thin films through the use of resilient members that function as elastic elements. These members can bend and deform to adapt to different container dimensions, providing both flexibility for adaptability and sufficient force for secure mounting
2Reliability
If the lid design requires accurate dimensional matching between lid and container, then the secure fit is improved, but the ease of manufacture deteriorates due to tighter tolerances
Solution Approach 1:
The patent changes the physical parameter of the securing elements from rigid to resilient, allowing them to deform and accommodate dimensional variations. This eliminates the need for tight manufacturing tolerances while maintaining secure fit through elastic deformation and snap-fit engagement
3Reliability
If resilient members are designed to extend far radially inward for secure engagement, then the mounting security is improved, but the complexity of the structure increases
Solution Approach 1:
The patent applies segmentation by dividing the securing function into multiple discrete resilient members distributed around the lid perimeter. Each member independently engages with the container rim, providing secure mounting while keeping individual member structures simple and manageable
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 arch-shaped strips provide a flexible solution that compensates for dimensional variations, ensuring a secure fit and easy mounting on containers with different dimensions, while also serving as a tamper-evident feature.
Implementation Method 1
the resilient members are formed as resilient elongate strips having two ends attached to the inner side of the skirt and formed as an arch which, in an unloaded state, has a rise with respect to the inner side of the skirt
Data Source
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AI summary
A packaging lid (1) for mounting over an opening of a packaging container. The lid (1) comprises a top side (2) that in a mounted state extends over an opening of the container and a skirt (3) extending from the top side (2). The skirt (3) has on an inner side (31) thereof resilient members (35) adapted to cooperate with an outwardly projecting ridge on an outer side of the circumferential wall of the container so as to secure the lid (1) to the container. The resilient members are formed as resilient elongate strips (35) having two ends (36) attached to the inner side (31) of the skirt (3) and formed as an arch which, in an unloaded state, has a rise with respect to the inner side (31) of the skirt (3).