Deflected Ink Stream Marking for Optical Fibers
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Solution Overview
Problem
Existing methods for marking optical fibers are slow and prone to errors, especially when using inkjet printing, and color-based coding schemes are limited in identifying multiple fibers effectively.
Innovation Solution
A method and apparatus that uses a deflected ink stream to mark optical fibers, allowing for high-speed marking with improved quality and the use of different colored inks without affecting transmission characteristics, by moving the fiber over a path where a gas jet intermittently deflects the ink stream to coat the fiber's surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inkjet printing is used to mark optical fibers, then marking can be performed, but the marking speed is slow and quality is compromised
Solution Approach 1:
The patent replaces the mechanical inkjet printing system with a continuous ink stream system that uses a gas jet to deflect the ink stream onto the fiber. This substitution eliminates the mechanical droplet ejection limitations and enables both high speed and high quality marking by allowing the fiber to move through a continuous ink stream at high velocities while maintaining mark integrity.
Solution Approach 2:
The patent employs a gas jet (pneumatic system) to deflect the continuous ink stream onto the optical fiber. This pneumatic mechanism allows precise control of ink application by using gas flow to redirect the ink stream, enabling high-speed marking while maintaining mark quality through controlled intermittent deflection.
2Adaptability or versatility
If color-based coding schemes are used to identify fibers, then identification is possible, but the number of identifiable fibers is limited to about eighteen
Solution Approach 1:
The patent changes the identification parameter from limited color options to positional encoding along the fiber length. By applying marks at different axial positions and using variable mark patterns (single marks, double marks, triple marks), the system achieves much higher identification capacity exceeding the traditional 18-fiber limit while maintaining the simplicity of the marking mechanism.
3Productivity
If high-speed marking is attempted, then productivity increases, but mark quality deteriorates with gaps and uneven marking
Solution Approach 1:
The patent employs a continuous ink stream that remains continuously available for marking. Unlike intermittent inkjet droplet ejection, the continuous ink stream ensures that whenever the fiber passes through the marking zone, ink is immediately available, eliminating gaps and ensuring uniform marking even at high speeds. The gas jet simply redirects this continuous stream onto the fiber path.
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 high-speed marking with better quality and visibility, allowing for efficient identification of multiple fibers without the limitations of traditional inkjet printing and color-based coding schemes.
Implementation Method 1
intermittently adjusting (deflecting) the ink stream path with a gas jet so that the ink stream path intersects the fiber path
Data Source
AI summary
A method of marking an optical fiber includes forming an ink stream, moving an optical fiber over a fiber path adjacent the ink stream, and intermittently deflecting the ink stream with a gas jet so that the optical fiber at least partially enters the deflected ink stream so that the ink from the deflected ink stream forms spaced apart marks on the optical fiber outer surface. An optical fiber marking apparatus is also disclosed that includes payout and take modules that move the optical fiber over the fiber path, a marking unit configured to form an ink stream adjacent the fiber path, and an ink stream deflection device that causes the ink stream to deflect and overlap the fiber path so that ink from the ink stream forms spaced apart marks on the outer surface of the optical fiber.