Inkjet Printer Head Rollable Body for Even Ink Distribution
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Solution Overview
Problem
Existing inkjet printer heads often fail to distribute ink evenly into multiple branch channels, leading to uneven ink distribution and ejection from nozzles, despite attempts to prevent air accumulation with tapered circumferential walls.
Innovation Solution
Incorporating a rollable body at the fork where the ink channel divides into branch channels, which adjusts resistance based on ink flow to ensure even distribution by moving towards the channel with lower static pressure, thereby narrowing its entrance and widening the other's.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the ink channel is simply divided into two branch channels, then the structure is simple, but the ink cannot be distributed evenly into the two branch channels
Solution Approach 1:
The patent introduces a movable partition wall that can shift position between the two branch channels. This dynamic structure allows the partition to respond to ink flow patterns and adjust the cross-sectional areas of the branches, enabling even ink distribution without complex active control mechanisms. The partition wall's mobility transforms a static, imbalanced structure into a dynamic, self-regulating system.
Solution Approach 2:
The patent changes the geometric parameters of the branch channels by introducing a movable partition wall that can alter the cross-sectional area of each branch. By adjusting the position of the partition wall, the system dynamically modifies the flow resistance and ink distribution parameters, achieving uniform ink ejection from all nozzles.
2Reliability
If a tapered circumferential wall is used to prevent air accumulation, then air flow is stabilized, but even ink distribution into branch channels is not achieved
Solution Approach 1:
The patent segments the single ink channel into two separate branch channels with a movable partition wall between them. This segmentation allows independent control of each branch's cross-sectional area, enabling the system to address ink distribution issues in each branch separately while maintaining overall flow stability.
Solution Approach 2:
The movable partition wall provides a dynamic solution that can adapt to varying ink flow conditions. Unlike a fixed tapered wall, the movable partition can shift position to balance ink distribution between branches, responding to real-time flow patterns and ensuring even ink ejection from all nozzles.
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 solution ensures even ink distribution into all branch channels, preventing uneven ejection and improving printing accuracy and efficiency by balancing flow resistance.
Implementation Method 1
a rollable body movably disposed at a division or fork at which the ink channel is divided into the branch channels
Implementation Method 2
a resistance against flow of the ink into each of the branch channels is changed by movement of the rollable body based on the flow of the ink
Data Source
AI summary
An inkjet printer head includes: (a) a head unit having a plurality of ink inlets and operable to eject an ink which is supplied through the ink inlets from an ink source, for performing a recording operation; (b) an ink channel held in communication with the ink source; (c) a plurality of branch channels held in communication with the ink inlets; and (d) a rollable body movably disposed at a fork at which the ink channel is divided into the branch channels.