Felt-Tipped Feeding Assembly for Standard Aqueous Ink Cartridges
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Solution Overview
Problem
There is no available writing system or writing block that can equip a writing instrument barrel, such as metal or plastic, with an acrylic tip working in conjunction with a short ink cartridge of international standard for water-based ink, and no felt-tipped writing instrument allows for a wide range of tip sizes and shapes with perfect air/ink exchange for capillary regulation of water-based ink output.
Innovation Solution
A feeding assembly for felt-tipped writing instruments that includes a writing point integrated with a stem feeder, a hollow core for connecting to an ink container, and an ink flow regulator, allowing water-based ink from a standard-sized cartridge to flow to the writing point, with adaptable tip shapes and sizes, and materials like capillary fibers and resin substrates for optimal ink delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a felt-tipped writing instrument uses a standard disposable cartridge of aqueous ink, then compatibility with international standard cartridges is improved, but the availability of such cartridges for felt-tipped instruments is currently nonexistent
Solution Approach 1:
The writing instrument is designed to accept standard international ink cartridges (ISO/IEC 11073-4) that were originally developed for ballpoint and nib pens. The feeding assembly incorporates a universal interface that can accommodate these standardized cartridges, allowing the same cartridge design to serve multiple types of writing instruments across different ink delivery mechanisms.
Solution Approach 2:
A feeding assembly acts as an intermediary component between the standard ink cartridge and the felt-tipped writing instrument. This intermediate device includes a hollow core with capillary channels that receive the cartridge and translate its ink supply into appropriate capillary flow for the felt tip, bridging the gap between cartridge designs optimized for gravity-based delivery and those requiring capillary action.
2Object-affected harmful factors
If the writing point is fed with water-based ink from a standard cartridge, then environmental safety is improved, but the lack of dedicated felt-tipped instruments with water-based ink feeding systems creates a market gap
Solution Approach 1:
The writing point utilizes porous felt material that enables capillary absorption and transport of water-based ink. The porous structure of the felt allows the low-viscosity aqueous ink to be drawn through capillary channels from the cartridge reservoir to the writing surface, mimicking the natural capillary action observed in traditional water-based fountain pens but adapted for disposable cartridge systems.
Solution Approach 2:
The feeding assembly is designed with specific capillary channel dimensions and surface properties that are optimized for water-based inks with viscosity below 1000 mPa·s at 23°C. The channel geometry and surface tension characteristics are tuned to ensure proper ink flow rates for aqueous formulations, distinguishing this system from those designed for higher-viscosity solvent-based inks.
3Ease of operation
If felt-tipped writing instruments are made disposable with integrated ink chambers, then ease of use is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The writing instrument is divided into two separate components: a reusable felt-tipped writing unit and a disposable ink cartridge. The cartridge can be manufactured independently using standardized processes for ballpoint and nib pens, then integrated with the writing unit through a simple feeding assembly. This segmentation allows each component to be optimized and manufactured separately, reducing overall manufacturing complexity.
Solution Approach 2:
The feeding assembly merges the functions of the ink cartridge interface, capillary ink delivery system, and felt tip holder into a single integrated component. This consolidation reduces the number of separate parts that need to be manufactured and assembled, simplifying the overall manufacturing process while maintaining the disposable convenience benefit.
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
Enables a wide range of tip sizes and shapes, ensuring smooth ink flow and compatibility with international standard water-based ink cartridges, enhancing writing comfort and reducing manufacturing time and costs, while maintaining environmental safety.
Implementation Method 1
a capillary wick, e.g. of textile impregnated with resin, for feeding ink from an ink container to a writing ball
Implementation Method 2
a writing-point comprising fibres, felt, or similar porous or capillary material
Data Source
Figure 1~2
Figure 3~4
Figure 5~10
AI summary
The invention relates to a felt tipped feeding assembly (1) and writing instrument (2) fed from a standard disposable cartridge of aqueous ink (3). The writing instrument (2) includes the feeding assembly (1) that comprises at least: a writing point (4), a feeder and a hollow core (21) for connection to an ink container. An ink flow regulator (36) includes a cylindrical lengthwise bore (39) formed inside the writing instrument (2), e.g. calculated from fluid parameters of the water based ink like dynamic viscosity. The writing point (4) is integrated to a stem feeder (19) to form the frontwards end thereof; the ink container is a standard sized water based ink cartridge (3) and the rear end of the hollow core (21) has a connection of the feeding assembly (1) to this standard ink cartridge (3). The invention typically allows producing various types and shapes of writing instrument e.g. for drawing, marking and scriptural language, dedicated to various surfaces.