Flexible Microporous Coffee Pod Casing for Clean Extraction
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Solution Overview
Problem
Existing coffee pods either crumble during storage and handling, leading to residual deposits in coffee machines, or require specialized machines for use and cleaning, resulting in incomplete aroma extraction and machine clogging.
Innovation Solution
A coffee pod with a flexible, microporous or micro-perforated casing that maintains its shape and elasticity during de-compaction and infusion, preventing tearing and allowing for complete aroma extraction without leaving residues in the machine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a casing is used to prevent crumbling of coffee aggregate, then storage stability is improved, but the casing tears during de-compacting and infusion, causing residual deposits in the machine
Solution Approach 1:
The patent changes the physical parameters of the casing material by specifying precise mechanical properties: ultimate elongation of at least 30% and ultimate tensile strength of less than 2,000 N/m. These parameter changes enable the casing to stretch and deform elastically during de-compacting and infusion without tearing, thereby preventing residual deposits while maintaining storage stability.
Solution Approach 2:
The patent employs a flexible casing made of elastic material that can deform under pressure. The casing acts as a flexible shell that stretches during the brewing process, allowing the coffee aggregate to expand and de-compact without rupturing the containment structure, thus avoiding residual deposits in the machine.
2Strength
If a rigid or semi-rigid capsule is used to maintain shape, then structural integrity is improved, but it requires specialized piercing equipment and cannot be used in standard coffee machines
Solution Approach 1:
The patent creates a pod system that is universally compatible with standard fully-automatic coffee machines. The casing design with specific elastic properties allows it to function in machines without specialized piercing equipment, enabling the same pod type to be used across different machine models while maintaining structural integrity during storage and handling.
Solution Approach 2:
The patent transitions from a rigid structure to a dynamic, elastic structure that can adapt to different machine conditions. The casing's ability to deform elastically under pressure allows it to withstand the brewing process in standard machines without requiring specialized piercing mechanisms, thereby improving versatility while maintaining strength.
3Manufacturing precision
If low gram weight fabric with large perforations is used to enable tearing, then extraction homogeneity is improved, but the casing cannot withstand deformation and volume increase during infusion
Solution Approach 1:
The patent optimizes the mechanical parameters of the casing material to achieve a balance between strength and permeability. By specifying ultimate elongation of at least 30% and controlled tensile strength, the casing can withstand deformation during infusion while maintaining sufficient porosity for homogeneous extraction of coffee aromas.
Solution Approach 2:
The patent employs a composite structure combining the elastic casing material with appropriate porosity characteristics. This composite approach allows the casing to maintain structural integrity during deformation while providing sufficient permeability for uniform water flow and aroma extraction, resolving the contradiction between strength and extraction homogeneity.
4Ease of manufacture
If no casing is used to reduce cost, then manufacturing cost is reduced, but the coffee aggregate crumbles during storage and handling
Solution Approach 1:
The patent uses a flexible, elastic casing as a thin film structure that provides protection during storage and handling. This thin protective layer prevents crumbling of the coffee aggregate while adding minimal manufacturing cost, striking a balance between protection and cost-effectiveness.
Solution Approach 2:
The patent employs a disposable pod system where the casing is designed for single use. The elastic casing provides sufficient protection during storage and handling, then serves its purpose during one brewing cycle, after which the entire pod is discarded. This approach keeps manufacturing costs low while ensuring aggregate integrity when needed.
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 pod ensures easy cleaning of the machine, maintains coffee quality, and can be used in standard coffee machines, providing a universal solution for producing espresso-style beverages with improved mechanical durability and homogeneity of extraction.
Implementation Method 1
a filtering casing formed of at least one permeable microporous or micro-perforated sheet or film trapping and following the contour of said aggregate of compacted coffee
Implementation Method 2
said sheet or film is flexible having stretch properties with an ultimate elongation (elongation at break) of at least 30%, an ultimate tensile strength (tensile strength at break or yield strength) of less than 2,000 N/m
Data Source
AI summary
A coffee pod which can be used for machines for preparing and dispensing coffee beverages that comprise at least one extraction chamber, and at least one piston for compacting a predetermined amount of ground coffee inserted into the extraction chamber. The pod includes: a predetermined amount of ground coffee compacted into an aggregate of ground coffee beans, having an outer shape suitable for rolling, and preferably a substantially spherical ball shape; and a filter casing formed of at least one pervious, microporous or microperforated sheet or film, trapping and matching the shape of the compacted coffee aggregate. The sheet or film is flexible, having stretchability properties with an elongation at rupture of at least 30% and an ultimate tensile strength of less than 2,000 N/m, and a thickness of at least 150 μm.