Coffee Capsule Porous Insert for Stable Extraction Pressure
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Solution Overview
Problem
Existing coffee capsule systems face challenges in consistently controlling the opening of the extraction face and maintaining flow consistency due to factors like membrane thickness and ground coffee characteristics, which affects coffee quality and extraction efficiency.
Innovation Solution
A coffee capsule design featuring an inverted cup-shaped body with a porous insert providing backpressure greater than the coffee ingredients, ensuring consistent interaction between coffee grains and water, and a sealing mechanism to maintain pressure and prevent leakage, allowing for a controlled release of coffee with a desirable cream formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a membrane with precisely controlled thickness is used for the extraction face, then the opening control is improved, but the consistency of flow is affected depending on ground coffee characteristics and perforation sizes
Solution Approach 1:
The patent replaces the traditional membrane with a porous plate made of sintered metal, ceramic, or plastic. The porous structure provides inherent flow control through its pore size and distribution, eliminating the need for precisely controlled membrane thickness while maintaining consistent flow regardless of ground coffee characteristics. The porous material's structural integrity ensures reliable operation without varying membrane properties.
Solution Approach 2:
The invention changes the fundamental parameter from membrane thickness control to porous material pore size and distribution control. By adjusting the pore size, porosity, and structural characteristics of the porous plate, the system achieves consistent flow control that is independent of ground coffee variations, resolving the contradiction between manufacturing precision and flow consistency.
2Reliability
If the extraction face is designed to tear against relief and recessed elements, then coffee quality is improved through retarded opening, but the opening control becomes difficult to repeatedly control
Solution Approach 1:
The porous plate eliminates the tearing mechanism entirely, providing a non-tearing, consistently controllable opening. The porous structure allows controlled water passage from the start of the extraction process, ensuring repeatable operation while maintaining coffee quality through its designed pore characteristics that control flow rate and pressure distribution.
Solution Approach 2:
The patent replaces the mechanical tearing system (relief and recessed elements causing membrane rupture) with a porous material system that allows controlled permeation. This substitution eliminates the variability inherent in tearing mechanics while maintaining the retarded opening effect through the porous structure's resistance to water flow, achieving both coffee quality and operational consistency.
3Reliability
If a porous insert providing high backpressure is used, then flow consistency is improved, but the device complexity increases
Solution Approach 1:
The porous plate serves as an integrated component that combines filtration, flow control, and backpressure generation in a single element. By selecting appropriate porous materials and designing the plate's thickness and pore distribution, the system achieves consistent flow control without requiring additional complex mechanisms, seals, or adjustment devices.
Solution Approach 2:
The porous plate performs multiple functions simultaneously: it acts as a filter to separate coffee grounds, provides flow control through its pore structure, generates backpressure to maintain extraction quality, and serves as the delivery wall structure. This multi-functionality reduces overall device complexity while achieving reliable flow consistency.
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 achieves consistent coffee extraction and cream formation by maintaining high backpressure and resistance to perforation, ensuring a high-quality coffee experience with controlled flow and pressure release.
Implementation Method 1
a delivery wall which is sealed to the body and comprises a relatively flat outer surface extending from the central axis of the capsule to the flange-like rim of the body and at least one portion of porous material capable of providing a backpressure that is greater than the backpressure of the beverage forming ingredient in the chamber
Data Source
AI summary
A capsule for the production of a beverage from a beverage production machine that provides a capsule holder with relief and recessed elements. The capsule includes an inverted cup-shaped body forming a chamber containing a beverage forming ingredient, a bottom injection wall, a sidewall and a flange-like rim; and a delivery wall which is sealed to the body and comprises a relatively flat outer surface extending from the central axis of the capsule to the flange-like rim of the body and at least one portion of porous material capable of providing a backpressure that is greater than the backpressure of the beverage forming ingredient in the chamber. Also, a system and method for the production of a beverage from the previously described capsule.