3D Brewing Sachet Structure for Tea Leaf Expansion

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Solution Overview

Problem

Existing tea bags have insufficient spatial capacity and poor brewing effects due to flat packages that constrain material expansion, leading to a lack of aesthetic appeal and inadequate infusion, failing to attract the consumption desire of modern consumers.

Innovation Solution

A brewing bag with a three-dimensional structure and reinforcing component, featuring a base layer and a reinforcing component that provides primary and auxiliary support, allowing for complex shapes and improved material expansion, while maintaining shape retention and enhancing aesthetics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If flat package is used, then manufacturing simplicity is improved, but brewing effect deteriorates due to spatial constraints

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidbrewing effect

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent transforms the traditional flat two-dimensional tea bag structure into a three-dimensional structure by adding a reinforcing component with main framework and rib system. This dimensional change creates internal cavity space that allows tea leaves to expand properly during brewing, resolving the contradiction between manufacturing simplicity and brewing effect.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent combines the base layer (filter material) with a reinforcing component (structural framework) to create a composite structure. The base layer maintains manufacturing simplicity while the reinforcing component provides the necessary three-dimensional shape and internal space for proper brewing, thus resolving the contradiction between ease of manufacture and brewing effect.

Inventive Principle:

Principle #40Composite materials

2Device complexity

If flat package is used, then device complexity is reduced, but aesthetics deteriorate

Engineering Contradiction:

Improvestructure simplicityVSAvoidaesthetics

Core Design Contradiction:

Device complexityVSShape

Solution Approach 1:

By adding the vertical dimension through the reinforcing component with main framework and rib system, the patent transforms the flat package into a three-dimensional structure with rich shapes and patterns. This maintains relative structural simplicity while dramatically improving aesthetic appeal through the visible three-dimensional form.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Manufacturing precision

If three-dimensional structure is added, then brewing effect is improved, but device complexity increases

Engineering Contradiction:

Improvebrewing effectVSAvoidstructure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The reinforcing component is segmented into a main framework and a rib system. The main framework provides the primary three-dimensional structure and internal cavity, while the ribs provide additional support and shape definition. This segmentation achieves the desired brewing effect through controlled structural complexity rather than uniform complexity throughout.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies structural complexity locally where needed - the reinforcing component is concentrated at the edges and key structural points to provide three-dimensional support, while the central area maintains simplicity to allow material expansion. This local application of complexity achieves brewing effect improvement without uniformly increasing overall device complexity.

Inventive Principle:

Principle #3Local quality

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 three-dimensional brewing bag offers enhanced brewing capacity, improved aesthetics, and diverse shapes, attracting consumer interest by providing sufficient space for material expansion and maintaining shape integrity during infusion.

Implementation Method 1

a base layer forming a three-dimensional structure as a whole, in which a cavity for accommodating materials is formed

Methodology Applied

Scientific EffectThree-dimensional structure formation:

Implementation Method 2

a reinforcing component compounded to the base layer

Methodology Applied

Scientific EffectCompounding:

Implementation Method 3

a main framework configured to provide primary support for a shape of the base layer

Methodology Applied

Scientific EffectStructural support:

Implementation Method 4

a rib system including a plurality of ribs disposed around the main framework, wherein the rib system is configured to provide auxiliary support for the shape of the base layer

Methodology Applied

Scientific EffectAuxiliary support:

Implementation Method 5

the base layer includes a first layer filter screen and a second layer filter screen

Methodology Applied

Scientific EffectFiltration: Filter (physical)

Implementation Method 6

a posture control component connected to a top of the bag body and configured to keep the bag body in a suspended state when immersed in liquid

Methodology Applied

Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Data Source

PatentEP4725870A1sachet

Publication Date: 2026.04.15 LIANG YONGZHENG

Figure 1~2
Figure 3~4
Figure 5~6

AI summary

A sachet, comprising a body (1). The body (1) comprises: a base layer (11) which integrally forms a three-dimensional structure, a cavity (13) for accommodating a material being formed inside the three-dimensional structure; and a reinforcing member (12) compounded on the base layer (11).