Stiffened Beverage Capsule Structure for Consistent Brewing Pressure
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Solution Overview
Problem
Existing beverage preparation systems using exchangeable capsules are prone to damage and deformation during transport, handling, and use due to soft walls, leading to poor reproducibility of the prepared beverage under fluid pressure.
Innovation Solution
Incorporating additional wall elements, such as stiffening ribs or compartments, into the capsule design to enhance stiffness and control fluid pressure build-up, while using biodegradable filters and piercing means to maintain capsule integrity and improve brewing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the capsule uses a soft wall to be flexible and easy to manufacture, then the ease of manufacture is improved, but the capsule becomes susceptible to damage and deformation during transport, handling and use
Solution Approach 1:
The capsule employs a composite structure combining a soft outer wall with an inner stiffening element. The soft wall maintains manufacturability and flexibility, while the rigid internal reinforcement provides structural support to prevent deformation and damage during handling and transport, resolving the contradiction between ease of manufacture and capsule integrity.
Solution Approach 2:
The capsule is divided into functional segments: the outer soft wall for manufacturability and the inner stiffening structure for structural integrity. This segmentation allows each component to fulfill its specific function - the soft wall can be easily formed while the rigid insert provides the necessary mechanical strength without requiring the entire capsule wall to be rigid.
2Device complexity
If the capsule wall is soft to reduce manufacturing complexity, then the device complexity is reduced, but the reproducibility of the prepared beverage deteriorates due to deformation under fluid pressure
Solution Approach 1:
The composite capsule structure with rigid internal reinforcement maintains low device complexity while ensuring beverage reproducibility. The stiffening element prevents wall deformation under fluid pressure during brewing, ensuring consistent contact between water and coffee grounds, while the overall simple capsule design keeps manufacturing and operation straightforward.
Solution Approach 2:
The capsule applies local quality by providing rigidity only where needed - at the bottom and lateral walls where structural support is required to maintain brewing geometry. The rest of the capsule maintains its simple soft-wall construction, achieving beverage reproducibility without significantly increasing overall device complexity.
3Strength
If additional wall elements are added to the capsule to provide stiffness, then the capsule strength is improved, but the device complexity increases
Solution Approach 1:
The stiffening structure is segmented into discrete components - a bottom element and lateral wall elements - that can be integrated into the capsule manufacturing process. This segmentation provides the necessary strength and rigidity while keeping the overall device complexity manageable through modular construction.
Solution Approach 2:
The stiffening elements are merged with the capsule wall structure during manufacturing, forming an integrated composite component. This merging approach provides enhanced strength without requiring separate assembly steps, thereby minimizing the increase in device complexity while achieving the desired mechanical reinforcement.
Data Source
AI summary
A system, method and capsule for preparing a predetermined quantity of beverage suitable for consumption using an extractable product includes an exchangeable capsule, and an apparatus including a receptacle for holding the exchangeable capsule, and a fluid dispensing device for supplying a fluid to the exchangeable capsule. The exchangeable capsule includes a circumferential wall, a bottom, and a lid. The wall, bottom and lid enclose an inner space including the extractable product. The bottom includes an entrance layer for supplying an amount of a fluid by the fluid dispensing device through the entrance layer to the capsule. The lid includes an exit layer for supplying a prepared beverage through the exit layer from the capsule to a container. The capsule includes an additional wall element extending towards the inner space for providing additional stiffness.