Beverage Capsule Sealing Rim for High-Pressure Extraction
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Solution Overview
Problem
Existing beverage production systems face challenges in maintaining a sufficient seal to withstand high pressures during espresso-style coffee production, leading to inefficient extraction and potential leaks, which affect the quality of the beverage.
Innovation Solution
Incorporating a resilient sealing member on the capsule that deforms and biases against the beverage production device's pressing surface, ensuring a pressure-tight seal and preventing water from escaping, thus maintaining the necessary pressure for effective extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a flange-like rim made of the same plastic material as the capsule body is used, then the capsule maintains sufficient rigidity, but the seal effect is insufficient to withstand high extraction pressure
Solution Approach 1:
The sealing rim is made of a material that is softer than the capsule body material, creating a local quality difference. This softer material can deform under pressure to create an effective seal while the rest of the capsule maintains its rigidity. The sealing rim's material properties are specifically tailored for sealing functionality rather than structural support.
Solution Approach 2:
The capsule uses a composite structure with at least two different materials: a harder material for the capsule body providing rigidity, and a softer material for the sealing rim providing sealing capability. This composite approach allows each material to optimize its function without compromising the other.
2Reliability
If the capsule rim is crushed to obtain a seal effect, then sealing is improved, but the capsule requires adaptation to user-dependent closure forces
Solution Approach 1:
The sealing rim is designed to automatically deform and create an effective seal under the normal operating pressure of the beverage making machine, without requiring user intervention to crush or deform it. The softer material self-adjusts to the sealing surface, eliminating the need for user-dependent force application.
Solution Approach 2:
The sealing rim's material hardness is specifically selected to be softer than both the capsule body and the machine's sealing surface, allowing it to deform under the machine's standard operating pressure range (typically 9-15 bars for espresso) to create a reliable seal, while the rest of the capsule maintains its structural integrity.
3Reliability
If a resilient sealing member is added to the capsule, then sealing engagement is improved, but the device complexity increases
Solution Approach 1:
The sealing function is merged into the capsule's existing rim structure rather than being a separate component. The sealing rim is integrated as part of the capsule body, eliminating the need for additional separate sealing elements and reducing overall system complexity while maintaining effective sealing engagement.
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
This solution ensures proper sealing engagement within the capsule, allowing for efficient extraction and maintaining beverage quality by preventing leaks and ensuring consistent pressure, even after multiple uses.
Implementation Method 1
a resilient sealing member (8) on the capsule which is deformable when the capsule is put in sealing engagement with the enclosing member (9) of the beverage production device
Data Source
AI summary
A capsule (1) contains beverage ingredients such as ground coffee, tea or other ingredients and is configured for insertion in a beverage production device (2) in order to have a liquid under pressure have enter the capsule (1) and to interact with the ingredients (3) in the capsule (11). The capsule (1) has a base body (4) and a foil member (5) closing the base body (4) by being attached to a flange-like rim (6) extending from the side wall (7) of the base body (4) of the capsule (1). The base body (4) of the capsule (1) comprises a resilient sealing member (8), the sealing member (8) being designed to be in sealing engagement with a bell member (9) of the beverage production device (2).