Asymmetric Container Closure Minimizing Material Through Lid-Base Size Mismatch
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Solution Overview
Problem
Existing container closures face challenges in minimizing material usage without compromising performance, as they often require matching base and lid sizes, leading to inefficiencies in design and material usage.
Innovation Solution
A 'big lid, small base' design where the lid is dimensioned to match the container's shoulder region, creating a deliberate overhang, allowing for reduced base size while maintaining a flush exterior appearance, with the lid being significantly larger than the base, connected via a hinge or engagement system, enabling minimal material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the base and lid are made the same size to maintain exterior appearance, then the aesthetic quality is improved, but the material usage increases
Solution Approach 1:
The patent applies asymmetry by making the lid larger than the base, breaking the conventional symmetric design where both parts are equal in size. The lid is dimensioned to match the container opening while the base is minimized to fit the dispensing orifice, creating an asymmetric closure system that reduces material usage while maintaining aesthetic appearance when closed.
Solution Approach 2:
The patent applies local quality by optimizing each component's size for its specific function: the lid is sized to match the container opening perimeter for aesthetic flush-fitting, while the base is minimized to only cover the dispensing orifice. This localized optimization allows different parts of the closure to have different dimensions appropriate to their respective functions.
2Reliability
If the lid is made larger to match the container opening, then the sealing quality is improved, but the material usage increases
Solution Approach 1:
The patent applies segmentation by dividing the closure into two distinct components of different sizes: the lid sized for sealing against the container opening and the base sized for covering the dispensing orifice. This segmentation allows each component to be optimized for its specific function without excess material in either part.
3Quantity of substance
If the base size is minimized to reduce material usage, then the material efficiency is improved, but the structural stability may worsen
Solution Approach 1:
The patent applies dynamics by introducing a hinge mechanism that allows the closure to transition between open and closed states. The hinge connects the minimized base to the larger lid, providing structural stability during operation while allowing the base to remain small for material efficiency. The hinge acts as a dynamic element that compensates for the reduced base size.
Data Source
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AI summary
A container closure ( 10) is provided and comprises a base (50) and a lid (55), and the footprint of the lid is larger than the footprint of the base.