Paper Capsule Sealing with Reinforced Annular Edge
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Solution Overview
Problem
Paper-based capsules for infused beverages often experience sealing issues due to infiltration between the annular peripheral edge and the side wall, exacerbated by improper centering, leading to suboptimal operation compared to traditional plastic capsules.
Innovation Solution
A paper capsule design featuring an annular reinforcing element with an elongate portion orthogonal to a second annular portion, applied to the side wall, and a liquid-proofing glue or resin layer to prevent water infiltration, ensuring a secure seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a paper-based capsule is used to replace plastic capsules for environmental reasons, then environmental sustainability is improved, but sealing reliability deteriorates due to infiltration between the annular peripheral edge and side wall
Solution Approach 1:
The annular peripheral edge is segmented into multiple functional portions: a first annular portion for basic sealing, a second annular portion for reinforcement, and an elongate portion for additional sealing contact. This segmentation allows each portion to address specific sealing challenges, preventing water infiltration while maintaining the paper-based eco-friendly structure.
Solution Approach 2:
The capsule employs a composite structure combining paper material with strategic sealing enhancements. The annular peripheral edge integrates multiple paper-based components (first and second annular portions, elongate portion) that work together to achieve plastic-level sealing reliability, proving that paper capsules can match plastic performance without environmental harm.
2Ease of manufacture
If the annular peripheral edge is simplified for ease of manufacture, then manufacturing complexity is reduced, but sealing performance deteriorates leading to water infiltration
Solution Approach 1:
The sealing structures (first annular portion, second annular portion, and elongate portion) are pre-formed as integral parts of the capsule during the molding process. This preliminary formation ensures proper geometry and positioning before the capsule is assembled and used, achieving reliable sealing without complex post-manufacturing operations.
3Reliability
If the capsule structure is made robust to prevent infiltration, then sealing reliability is improved, but device complexity increases
Solution Approach 1:
The first annular portion, second annular portion, and elongate portion are merged into a single integrated annular peripheral edge structure formed from one continuous paper-based material. This merging achieves robust multi-functional sealing capability while maintaining manufacturing simplicity and avoiding the complexity of assembling separate components.
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 design significantly reduces infiltration problems, ensuring optimal operation and beverage quality by creating a secure seal between the annular edge and side wall, even when the capsule is not perfectly centered.
Implementation Method 1
a liquid-proofing glue or resin layer applied at the head surfaces of the first and second annular portions
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
A capsule (100) for machines for preparing infused beverages is described, comprising: a body (2) shaped like a bowl, comprising a side wall (4) extending around an axis (X-X) and a bottom wall (3); said body (2) being made of paper or paper material; said body (2) being sized so as to contain a predetermined amount of a powdered preparation for preparing an infused beverage. The capsule being further provided with an annular peripheral edge (18) designed to abut against a bearing surface of an infusion chamber of an infusion assembly when the capsule (100) is inserted into the chamber. The annular peripheral edge (18) comprises a first annular portion (19) integrally made with the bowl-like body (2); and an annular reinforcing element (20) comprising a second annular portion (21) applied to the first annular portion (19) and an elongate portion (22) extending along a direction parallel to the axis (X-X) to face towards said side wall (4).