Impermeable Coffee Packaging Peripheral Seal Strength
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Solution Overview
Problem
Existing packaging for ground coffee or tea capsules lacks mechanical strength due to inadequate attachment of filter paper, leading to potential detachment during water flow, altered brewing quality, and increased manufacturing complexity and cost.
Innovation Solution
A packaging system with integral filter layers forming a peripheral seal, an impermeable envelope, and a rupture initiator, allowing balanced tensile force distribution and controlled deformation, facilitating single-step manufacturing and improved mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If filter paper sheets are attached to upper and lower faces using conventional fixing means, then the packaging can be manufactured with separate components, but the mechanical strength is insufficient and the attachment may be damaged during water passage
Solution Approach 1:
The patent merges the filter paper sheets and the impermeable envelope into a single integral structure where the filter layers form the upper and lower faces of the envelope itself. This eliminates separate attachment steps while providing inherent mechanical strength, as the filter layers are not merely attached but constitute the structural faces of the packaging.
2Strength
If multiple separate components are used for packaging construction, then manufacturing steps increase and cost increases, but structural integrity may be compromised
Solution Approach 1:
The invention combines multiple functions into a single integrated envelope structure where the filter layers form the upper and lower faces, and the side walls connect these faces. This single-integral-structure approach eliminates the need for separate attachment of filter papers to pre-formed envelopes, reducing manufacturing steps while maintaining structural integrity through the unified design.
3Reliability
If filter paper attachment is weakened during water passage, then water flow through the capsule is altered and drink quality is reduced, but stronger attachment methods increase manufacturing complexity
Solution Approach 1:
The patent eliminates the attachment reliability problem by merging the filter layers into the envelope structure itself. The filter layers form the upper and lower faces of the envelope, meaning there is no separate attachment interface that could fail during water passage. This integral design ensures attachment reliability while actually simplifying manufacturing by removing attachment steps.
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
Enhances mechanical strength, simplifies production, ensures optimal water flow, and maintains aroma release by distributing pressure evenly and allowing controlled expansion of the material during brewing.
Implementation Method 1
the tensile forces are distributed in a balanced manner over the entire periphery of the packaging
Implementation Method 2
When the internal pressure of the package exceeds a certain value, the lower film breaks at the initiation of the rupture
Implementation Method 3
The material to be infused can expand due to the flexibility of the filter layers and the existence of the expansion space
Implementation Method 4
the water is channeled, there is no leak or passage of parasitic water at the periphery
Data Source
Figure 1~5
AI summary
This invention relates to an impermeable packaging (1) for the infusion of an infusible substance (2), having at least two filter layers (3) in such a way as to define a volume in which the infusible substance (2) is received, and an impermeable envelope (4) designed to cover the two filter layers (3), wherein the two filter layers (3) are joined around the perimeter (5), which latter is attached to the envelope (4), and the filter layers are joined around the perimeter to an outer reinforcement (8). The invention is applicable to the packaging of ground coffee or tea usable with machines using servings of ground coffee or prepackaged tea.