Ink Delivery System for Print Head Orientation Flexibility
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Solution Overview
Problem
Conventional ink delivery systems are limited by gravity and require specific height configurations, making it difficult to deliver ink to print heads at angles other than vertical, and often struggle with efficient ink distribution and pressure control.
Innovation Solution
A closed-loop ink delivery system with multiple tanks, pumps, and pressure regulators that maintain a pressure differential across print heads, allowing ink to flow through print heads at various angles by controlling pressure and flow rates using pumps and flow restrictors, eliminating the need for gravity-fed systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If gravity feed systems are used to deliver ink, then the system structure is simple, but the system cannot deliver ink to print heads at angles other than vertical and requires specific height configurations
Solution Approach 1:
The patent employs a pump-driven hydraulic system to replace gravity-based ink delivery. The pump actively pressurizes ink and delivers it to the print head through controlled fluid dynamics, enabling ink flow in any orientation without relying on gravitational force. This hydraulic approach allows printing at any angle while managing system complexity through controlled pressure differentials.
Solution Approach 2:
The system dynamically adjusts pressure parameters to accommodate different printing orientations. By varying the pressure differential across the print head, the system maintains consistent ink flow regardless of the print head's angular position relative to gravity, thus achieving versatility without proportional increases in complexity.
2Reliability
If conventional ink delivery systems are used, then the system is passive and simple to operate, but it cannot maintain consistent ink flow and pressure at various orientations
Solution Approach 1:
The system incorporates feedback mechanisms through pressure sensors and flow monitors that continuously detect ink delivery conditions. This feedback allows the control system to adjust pump operation in real-time, maintaining consistent ink flow and pressure across varying orientations. The automated feedback loop preserves reliability while minimizing the need for manual intervention.
Solution Approach 2:
The pump-driven system automatically regulates its own operation to maintain consistent ink flow. The control system self-adjusts pressure and flow rates based on detected conditions, eliminating the need for manual height adjustments or orientation-specific configurations. This self-regulating capability ensures reliable ink delivery while keeping operation simple.
3Productivity
If gravity-fed systems are used, then no active components are required, but the system requires maintenance of specific constant heights between components
Solution Approach 1:
The pump-driven hydraulic system replaces gravity-dependent height configurations with active pressure control. The pump generates the necessary pressure differential to move ink against gravity or in any direction, eliminating the need for specific vertical height relationships between ink reservoir and print head. This enables printing flexibility without height constraints.
Solution Approach 2:
The system transitions from static height-based ink delivery to dynamic pressure-based delivery. The pump can dynamically adjust its output to accommodate any print head orientation or position, making the system adaptable to various printing scenarios without requiring fixed spatial relationships between components.
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 print heads to operate at any orientation relative to gravity, ensuring consistent ink flow and meniscus pressure, allowing for efficient and flexible ink delivery without relying on gravity or constant height differentials, facilitating printing on non-vertical surfaces.
Implementation Method 1
a pump configured to pump ink from the first tank to the second tank
Implementation Method 2
a pressure differential across the print head causes ink to flow through the print head
Data Source
AI summary
A method of printing including providing an ink delivery system including a print head in fluid communication between a first tank and a second tank; and providing a pressure differential across the print head to cause ink to flow from the print head. With embodiments of the method, ink can be controllably dispensed from the print head at substantially the same velocity irrespective of the orientation of the print head with respect to the direction of the force of gravity.