Drink Capsule Outlet Cut for Air Venting and Pre-Infusion
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Solution Overview
Problem
Existing methods for preparing espresso using disposable capsules are inefficient in achieving consistent quality due to factors like incomplete penetration of water into coffee granules, leading to suboptimal extraction of flavors and aromas, and are prone to construction issues and high production costs.
Innovation Solution
A capsule design with a second wall featuring a linear cut that allows air passage but restricts liquid passage initially, followed by increased pressure to deform and open, ensuring deep penetration and efficient extraction of coffee flavors, without requiring narrow tolerances or complex mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water is injected into the capsule to extract coffee, then coffee flavors and aromas are extracted, but water does not deeply penetrate the micro-pores of coffee granules due to gaseous substances blocking the pores
Solution Approach 1:
The patent applies preliminary action by creating a cut in the capsule wall before water injection to enable air evacuation. This preliminary structural modification allows gaseous substances to be removed from the coffee granule micro-pores before water extraction begins, ensuring deep water penetration and reliable extraction quality without requiring complex control mechanisms during the extraction process itself.
2Reliability
If pre-infusion is used to compress gaseous substances in coffee pores, then water penetration improves, but the method is complex and expensive to implement
Solution Approach 1:
The patent extracts the air evacuation function from the complex pre-infusion mechanism by directly creating a cut in the capsule wall that allows air to escape during normal water injection. This eliminates the need for separate pre-infusion equipment while achieving the same effect of removing gaseous substances from coffee pores, thereby improving water penetration without increasing device complexity or cost.
Solution Approach 2:
The cut in the capsule wall acts as an intermediary element that facilitates air evacuation during water injection. Instead of using complex pre-infusion machinery, the cut serves as a simple structural intermediary that enables gaseous substances to be compressed and expelled from the coffee granules, achieving deep water penetration through a straightforward design.
3Reliability
If empirical methods are used to optimize extraction cycle, then organoleptic quality may be improved, but the method is difficult to quantify and maintain constant
Solution Approach 1:
The patent changes the physical parameter of the capsule wall by creating a cut that fundamentally alters the extraction process. This structural modification enables automatic air evacuation and deep water penetration without requiring precise control of empirical parameters like time, temperature, and pressure. The cut provides a simple, quantifiable structural feature that ensures consistent extraction quality while eliminating the complexity of optimizing multiple interdependent parameters.
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 method ensures reliable and constant pre-infusion, preventing jamming and maintaining high organoleptic quality with reduced production costs, as it allows for efficient extraction of coffee flavors and aromas while being easy to produce and implement.
Implementation Method 1
the water to deeply penetrate the micro-pores of the coffee granules/powder, thanks to its own pressure compressing and therefore reducing the volume of the gaseous substances present in said pores
Implementation Method 2
a cut (10) extending in a linear fashion through said second wall (3), said cut (10) being delimited by two adjacent portions (11) of said second wall drawn near one another, so that, after said two adjacent portions (11) have drawn near one another again if necessary, said cut (10) allows the passage of air and substantially, directly or indirectly, prevents the passage of liquid
Data Source
Figure 1~2
Figure 3~5
AI summary
A capsule for preparing drinks containing a substance to be extracted and comprising at least a first wall (2) designed to form an inlet wall for the water to be injected into the capsule, and a second wall (3) designed to form an outlet wall for a drink obtained by the interaction between the water and the substance to be extracted. The second wall (3) has at least one cut (10) extending in a linear fashion, substantially made without removing material from the second wall (3), and delimited by two adjacent portions (11) of the second wall drawn near one another. The cut (10) has a size and/or shape such that, after the adjacent portions (11) delimiting it have drawn near one another again if necessary, substantially, directly or indirectly, it prevents the passage of liquid and allows the passage of air, said adjacent portions being deformable towards the outside of the capsule in such a way to form an opening for the beverage flowing out. A method using such capsule for the preparation of a drink is also claimed.