Canister Snap-On Cap With Variable Wall Thickness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Canisters with active agents, such as desiccants or oxygen scavengers, often experience cap popping off due to deformation under external forces or dimensional tolerance variations, leading to unreliable snap-on connections and potential contamination of packaged goods.
Innovation Solution
A canister design featuring a non-removable snap-on cap with a peripheral skirt that forms a gap between a thinner upper portion and a thicker lower portion of the body wall, providing a reliable snap-on connection that is less sensitive to assembly pressure and foreign particles, ensuring the active agent remains contained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a snap-on connection is used to secure the cap to the canister body, then the assembly process is simple and fast, but the connection reliability deteriorates under external forces or dimensional tolerance variations
Solution Approach 1:
The cap is designed with a peripheral skirt that has non-uniform thickness: a thinner upper portion and a thicker lower portion. This local variation in quality allows the thinner upper portion to engage with the canister body for simple assembly, while the thicker lower portion provides enhanced mechanical strength and resistance to popping off under external forces, thus resolving the contradiction between assembly simplicity and connection reliability.
2Adaptability or versatility
If dimensional tolerances of the cap and body are varied, then manufacturing flexibility increases, but the snap-on connection quality deteriorates
Solution Approach 1:
The invention changes the thickness parameter of the cap's peripheral skirt, creating a gradient from thinner upper portion to thicker lower portion. This parameter variation allows the design to accommodate dimensional tolerance variations in manufacturing while maintaining reliable snap-on connection, as the thicker lower portion compensates for tolerance variations and provides a more robust connection interface.
3Productivity
If high-speed filling process is used to insert active agent into canister, then productivity increases, but foreign particles may contaminate the snap-on connection surfaces
Solution Approach 1:
The thinner upper portion of the peripheral skirt acts as an intermediary barrier between the filling process and the critical snap-on connection surfaces. During high-speed filling, particles that may be generated or present are more likely to affect the thinner upper portion rather than the thicker lower portion where the actual connection occurs, thus protecting the connection surfaces from contamination while maintaining high filling speeds.
Data Source
AI summary
A canister containing an active agent wherein the canister includes a canister body having a peripheral body wall defining an upper opening and a non-removable snap-on cap. The cap includes a peripheral skirt. The peripheral body wall of the canister includes a step formed between a first portion of the peripheral body wall and a second portion located beneath the first portion. The first portion is thinner than the second portion to form the step, wherein an inner shape of the peripheral skirt and an outer shape of the first portion of the peripheral body wall form a snap-on fit, wherein the cap surrounds the first portion. A vertical extension of the peripheral skirt is smaller than a vertical extension of the first portion of the peripheral body wall to form a gap between the step and the peripheral skirt.