Deformable Pouch Felt Pen Ink System
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Solution Overview
Problem
Conventional writing felt pens are limited by the cylindrical shape of their ink system component, leading to dead space and material thickness issues, which restricts design flexibility and ink flow efficiency.
Innovation Solution
A writing felt pen featuring a deformable pouch composed of absorbent polymer and fibers, where the nib is in fluidic communication with the mix, allowing for a non-cylindrical barrel shape and continuous ink flow, utilizing a porous buffer with interconnected pores and specific fiber and resin combinations to manage ink absorption and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cylindrical ink system component is used, then the barrel structure is simple and easy to manufacture, but dead space is created and material thickness increases
Solution Approach 1:
The ink system is segmented into a deformable pouch containing absorbent polymer and fibres, separated from the barrel structure. This allows the barrel to be thin-walled without cylindrical constraints while the pouch adapts to available space, eliminating dead space caused by thick cylindrical walls.
Solution Approach 2:
The ink system uses a deformable pouch instead of a rigid cylindrical container. The pouch dynamically changes shape and volume as ink is consumed, adapting to the available space within the barrel and eliminating the need for fixed thick walls, thereby reducing dead space.
2Ease of manufacture
If a cylindrical ink system component is used, then the manufacturing process is straightforward, but design flexibility is restricted
Solution Approach 1:
By separating the ink storage function (pouch) from the structural function (barrel), the design gains flexibility. The pouch can be positioned and shaped independently, allowing various barrel designs while maintaining manufacturing simplicity through modular assembly.
Solution Approach 2:
The deformable pouch made of flexible material replaces the rigid cylindrical constraint, allowing the barrel to have diverse shapes and thin walls. The flexible pouch adapts to any barrel configuration, providing design freedom without complicating manufacturing.
3Device complexity
If conventional ink system components are used, then the structure is simple, but ink flow efficiency is reduced
Solution Approach 1:
The ink system incorporates a porous buffer and absorbent polymer with controlled porosity. The porous structure creates capillary channels that efficiently transport ink from the pouch through the buffer to the nib, significantly improving ink flow efficiency while maintaining structural simplicity.
Solution Approach 2:
The ink system uses a composite structure combining absorbent polymer, fibres, and porous buffer materials. This composite approach optimizes ink absorption, storage, and flow properties, enhancing ink delivery efficiency without substantially increasing device complexity.
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 configuration enables a flexible barrel shape, reduces material thickness, and ensures continuous ink flow by adapting to ink consumption, maintaining fluidic communication between the nib and the absorbent polymer-fiber mix, thereby optimizing ink usage and pen performance.
Implementation Method 1
a deformable pouch (24) including a mix (16) of absorbent polymer (18) and fibres (20), an ink being absorbed in the absorbent polymer (18)
Implementation Method 2
the buffer (22) has a porosity greater than the porosity of the nib (14)... the ink absorbed in the absorbent polymer (18) is drained by the fibres (20) from the absorbent polymer (18) to the nib (14)
Implementation Method 3
The buffer has a porosity greater than the porosity of the nib. The buffer may be a porous system with interconnected open pore.
Data Source
Figure 1~2
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Figure 5~6
AI summary
A writing felt pen (10) including a barrel (12) and a nib (14) attached to the barrel (12), and a deformable pouch (24) comprising a mix (16) of absorbent polymer (18) and fibres (20), an ink being absorbed in the absorbent polymer (20) and the nib (14) being in fluidic communication with the mix (16).