Double-Walled Annular Liquid Delivery Element for Aerosol Articles
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Solution Overview
Problem
Conventional smoking articles face challenges in securely storing and delivering liquids within the filtration material without leakage during storage and manufacturing, requiring complex assembly and additional components.
Innovation Solution
A double-walled annular liquid delivery element with a cavity and annular sealing means, where the inner wall is breakable upon compressive force, allowing secure liquid storage and controlled release into the filtration material, maintaining airflow resistance and compatibility with existing manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid is deposited directly onto filtration material during manufacture, then liquid delivery is achieved, but liquid leakage and staining occur during storage
Solution Approach 1:
The liquid delivery element is segmented into a double-walled annular structure with an inner wall defining a longitudinal channel and an outer wall circumscribing the inner wall to define a cavity. This segmentation creates distinct functional zones: the cavity for liquid storage and the longitudinal channel for liquid delivery, preventing liquid leakage during storage while enabling controlled delivery during use.
Solution Approach 2:
The liquid delivery element employs a nested structure where the inner wall is positioned within the outer wall, creating a cavity between them. The annular sealing means is inserted between the inner and outer walls to seal the cavity. This nested configuration allows the liquid to be contained within the cavity while the sealing means prevents escape, resolving the contradiction between liquid containment and delivery.
2Reliability
If breakable plastic capsule with additional components is used to contain liquid, then liquid leakage is prevented, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The liquid delivery element merges multiple functions into a single integrated component: the double-walled annular body provides both structural support and liquid containment, the longitudinal channel provides liquid delivery pathway, and the cavity provides liquid storage. This merging eliminates the need for separate corrugated sheets and additional components required in conventional capsules, reducing device complexity while maintaining liquid containment reliability.
Solution Approach 2:
The liquid delivery element is designed as a multi-functional component that simultaneously serves as a structural element, a containment vessel, a delivery mechanism, and a sealing system. The double-walled annular structure with integrated longitudinal channel and cavity can be incorporated into existing filter constructions without requiring separate components for each function, thereby reducing overall device complexity.
3Ease of operation
If inner wall is made breakable for liquid release, then liquid delivery is enabled, but structural strength is reduced
Solution Approach 1:
The inner wall is designed with non-uniform properties: certain portions are made breakable to enable liquid release upon application of compressive force, while other portions maintain sufficient strength for structural support and assembly. This local differentiation of quality allows the inner wall to simultaneously provide structural integrity during manufacture and assembly, and controlled breakability during consumer use for liquid delivery.
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 effectively prevents liquid leakage during storage, allows controlled liquid delivery, and simplifies manufacturing by integrating with existing high-speed processes, maintaining similar resistance to draw as conventional cigarettes.
Implementation Method 1
The inner wall and the outer wall of the annular body portion are configured such that the inner wall is breakable upon application of a compressive force to the liquid delivery element in a transverse direction and such that upon breakage of the inner wall the liquid is released from the cavity into the longitudinal channel
Implementation Method 2
annular sealing means inserted between the inner wall and the outer wall of the annular body portion to provide a liquid tight seal at the opening or openings of the cavity in the annular body portion
Data Source
AI summary
An aerosol-generating article (10) includes a mouthpiece (14) comprising at least one segment of filter material (18,20) and a liquid delivery element (22). The liquid delivery element (22) comprises: an upstream end and a downstream end; a double-walled annular body portion (28) comprising: an inner wall (34) defining a longitudinal channel (38) extending through the liquid delivery element (22); and an outer wall (32) integrally formed with the inner wall (34), the outer wall (32) circumscribing the inner wall (34) such that a cavity (36) is defined between the outer wall (32) and the inner wall (34), the cavity (36) having an opening in at least one of the upstream end and the downstream end and containing a liquid; and annular sealing means (40) inserted between the inner wall (34) and the outer wall (32) of the annular body portion (28) to provide a liquid tight seal at the opening or openings of the cavity (36). The inner wall (34) and the outer wall (32) of the annular body portion (28) are configured such that the inner wall (34) is breakable upon application of a compressive force to the liquid delivery element (22) in a transverse direction and such that upon breakage of the inner wall (34) the liquid is released from the cavity (36) into the longitudinal channel (38).