Beverage Capsule Inlet Wall Structure for Controlled Pressure Rupture
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Solution Overview
Problem
Capsules for beverage extraction under pressure face issues such as collapse risk, high production costs, and unsatisfactory liquid flow due to lid interference with the support in extraction devices.
Innovation Solution
A capsule design featuring a frustoconical side wall with a bottom portion and a zone of lesser resistance that breaks under pressurized fluid, allowing controlled fluid entry and exit, and a snap-action lid with a filter and membrane for efficient extraction, while being made from compatible materials to reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the capsule uses a simple bottom structure, then production cost is reduced, but the capsule collapses under pressurized fluid
Solution Approach 1:
The bottom of the inlet wall is designed with non-uniform thickness, featuring a thicker peripheral portion for structural strength and a thinner central portion for controlled breaking. This local variation in material distribution allows the capsule to maintain overall integrity while enabling the desired breaking behavior under pressure, resolving the contradiction between strength and manufacturability.
Solution Approach 2:
The bottom structure is segmented into distinct functional zones: a peripheral portion that maintains structural integrity and a central portion that is designed to break. This segmentation allows different parts of the same component to serve different functions - one part provides strength while another part enables controlled failure, thus resolving the contradiction between structural integrity and ease of manufacture.
2Reliability
If the lid is pressed against the support for secure positioning, then the capsule is firmly held in the device, but liquid flow through the capsule is blocked
Solution Approach 1:
The system transitions from a static pressing relationship to a dynamic breaking relationship. The lid is initially pressed against the support to ensure proper positioning and sealing, but then the inlet wall bottom breaks under pressure to create flow paths. This dynamic transition allows the system to achieve both secure positioning and adequate liquid flow, resolving the contradiction between reliability and productivity.
3Ease of manufacture
If the inlet wall is made from a single material for simplicity, then manufacturing is easier, but the capsule cannot be calibrated for different pressure levels
Solution Approach 1:
The inlet wall is constructed with non-uniform material distribution, creating zones of different resistance to breaking. By varying the thickness and material properties in different regions of the bottom, the capsule can be calibrated for specific pressure levels while maintaining a relatively simple single-material construction approach. This local variation enables pressure calibration without requiring completely different materials, thus resolving the contradiction between manufacturing simplicity and adaptability.
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 capsule design prevents collapse, allows adjustable pressure calibration, ensures satisfactory liquid flow, and is cost-effective for large-scale production, maintaining the quality of the extracted beverage.
Implementation Method 1
the inlet wall is designed to break under the effect of a pressurized fluid and comprises a bottom portion and a zone of lesser resistance intended to break under the effect of a pressurized fluid
Implementation Method 2
an extraction liquid under pressure enters the capsule through the bottom and exits through the lid
Data Source
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AI summary
The invention relates to a capsule (2002) for the pressurized extraction of a beverage, including: a sidewall (2006) extending along an axis (X-X), an inlet wall (2008) closing a first end of the sidewall (2006), and an outlet wall (2010) closing a second end of the sidewall (2006), thus defining a chamber (2014) for receiving a substance for preparing a beverage. According to one form of the invention, the inlet wall (2008) is provided so as to rupture when exposed to a pressurized fluid and includes a base portion (2016) and an area (2026) of least resistance that is provided so as to rupture when exposed to a pressurized fluid on the periphery of the base portion (2016).