Valve-Free Felt Pen Nib With Hydrophobic Inserts
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Solution Overview
Problem
Existing free ink writing felt pens require complex baffles to maintain air balance and prevent ink leakage, which complicates manufacturing and may not ensure optimal ink flow.
Innovation Solution
A valve-free design where the nib acts as a baffle, made of porous hydrophilic material with integrated porous hydrophobic inserts to allow air intake and prevent ink leakage, simplifying production and enhancing ink flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional baffles are used to maintain air balance and prevent ink leakage, then ink flow control is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the baffle function with the nib by integrating hydrophobic inserts directly into the nib body. The hydrophobic inserts are positioned within the nib's porous structure, allowing the nib to simultaneously perform its writing function and act as a baffle for air balance and ink flow control, thereby eliminating the need for separate baffle components.
Solution Approach 2:
The nib is designed to serve multiple functions: it delivers ink to the writing surface through its porous hydrophilic material, while simultaneously acting as a baffle to maintain air balance and control ink flow through integrated hydrophobic inserts. This multi-functional design simplifies the overall device structure by eliminating dedicated baffle components.
2Reliability
If traditional baffles are used to maintain air balance, then ink leakage is prevented, but manufacturing simplicity is reduced
Solution Approach 1:
The baffle function is merged with the nib by integrating hydrophobic inserts into the nib body. This integration eliminates the need for separate baffle manufacturing and assembly processes, thereby simplifying production while maintaining effective leakage prevention through the hydrophobic material's inherent properties.
3Device complexity
If the nib acts as a baffle with hydrophobic inserts, then manufacturing is simplified and autonomy is increased, but ink flow consistency must be maintained
Solution Approach 1:
The nib features localized hydrophobic inserts positioned specifically within its structure, while the rest of the nib maintains hydrophilic properties for ink absorption. This local differentiation allows the nib to act as an effective baffle at specific locations without compromising overall ink flow consistency to the writing surface.
Solution Approach 2:
The nib is constructed as a composite structure combining hydrophilic material (for ink absorption and flow) with integrated hydrophobic inserts (for air balance and flow control). This composite design enables the nib to simultaneously simplify device structure and maintain reliable ink flow consistency through the complementary properties of the different materials.
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 solution enhances the reliability and manufacturing simplicity of free ink writing felt pens by eliminating traditional baffles and ensuring consistent ink flow without leakage, thereby increasing autonomy.
Implementation Method 1
a nib (18) for a valve-free free ink writing felt pen... the nib including a main body (34) made of porous hydrophilic material
Implementation Method 2
one or more insert (36) made of porous hydrophobic material, the one or more insert (36) being configured to allow intake of air from the outside of a free ink tank (14) into the free ink tank (14) and avoid ink leakage outside the free ink tank (14)
Data Source
AI summary
A nib for a valve-free free ink writing felt pen including a first end configured to deliver ink to a writing support and second end, opposite the first end, configured to be inserted in a nib receiving part of the valve-free free ink writing felt pen, the first end and the second end defining an axial direction of the nib, the nib including a main body made of porous hydrophilic material and including one or more insert made of porous hydrophobic material, the one or more insert being configured to allow intake of air from the outside of a free ink tank of the valve-free free ink writing felt pen into the free ink tank and avoid ink leakage outside the free ink tank. A valve-free free ink writing felt pen including a nib.