Beverage Capsule V-Folded Filter Strip for Uniform Extraction
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Solution Overview
Problem
Current beverage dispensing systems are inadequate for preparing high-pressure beverages like espresso, as they fail to maintain uniform extraction and are prone to cross-contamination, with existing capsules not designed to handle pressures above 5 bar, leading to inefficient brewing and contamination issues.
Innovation Solution
A beverage preparation capsule with a V-folded filter strip and a beverage preparation apparatus featuring a clamp assembly that can apply high pressures, ensuring uniform extraction and preventing cross-contamination by pinching the outlet channel to maintain high back pressure and compress the coffee bed effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high pressure is applied to extract beverage from capsule, then extraction efficiency is improved, but uniformity of extraction deteriorates due to channeling
Solution Approach 1:
The filter strip is positioned specifically at the outlet end of the ingredient bed rather than throughout, creating localized filtration that maintains pressure uniformity while enabling efficient extraction. The filter strip occupies only the bottom-most portion of the ingredient bed, allowing uniform water distribution across the bed while preventing channeling at the outlet.
Solution Approach 2:
The capsule is segmented into distinct functional zones: an ingredient bed region for extraction and an outlet channel region with filter strip for pressure regulation. This segmentation allows the water to uniformly traverse the ingredient bed while the filter strip at the outlet manages pressure distribution to prevent channeling.
2Device complexity
If existing capsule design is used, then device simplicity is maintained, but cross-contamination occurs and high-pressure capability is lost
Solution Approach 1:
The filter strip is extracted as a separate component positioned within the outlet channel rather than being integrated throughout the entire capsule structure. This allows the filter strip to be a distinct element that can be easily manufactured and positioned, maintaining overall capsule simplicity while providing reliable contamination prevention through dedicated filtration at the outlet.
3Manufacturing precision
If filter strip extends deeply into ingredient chamber, then filtration is improved, but water flow distribution deteriorates causing channeling
Solution Approach 1:
The filter strip is positioned locally at the outlet end of the ingredient bed, occupying only the bottom-most portion rather than extending throughout the entire ingredient chamber. This localized positioning provides effective filtration at the critical outlet point while leaving the upper ingredient bed open for uniform water distribution and preventing channeling.
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 enables the preparation of high-pressure beverages with improved uniformity and reduced waste, while preventing cross-contamination by maintaining high back pressure and optimizing coffee bed compression, enhancing the quality and efficiency of espresso production.
Implementation Method 1
maintaining high back pressure
Implementation Method 2
compress the coffee bed effectively
Implementation Method 3
V-folded filter strip
Data Source
AI summary
A beverage preparation capsule including front and back sheets that are bonded together along a top edge, first and second side edges, and a bottom edge. A region of bonding along the bottom edge may be releasable to allow escape of beverage from the capsule during beverage preparation. There may be a transverse seal that is interrupted by a gap that provides fluid communication between a beverage ingredient chamber located above said gap and a beverage outlet chamber located below said gap. A folded filter strip extending across the capsule includes a fold extending transversely below said transverse seal and front and back side panels extending upwardly through said transverse seal that are bonded to the front and back sheets of the capsule, respectively. The front and back side panels may not extend more than about 10 mm into said beverage ingredient chamber above said transverse seal.