What is the purpose of the coils or rings on the Pilot Precise V5/V7 pens? Pilot calls the system "advanced ink feeding system" but I cannot figure out how it works or find the patent for it. If you have one of these pens you notice that when it is new, the coils are all clean. With use, ink starts to spread into the chamber and seems to be held back to be dried on the large surface area of the coils. What really bugs me are the spots of ink that appear on coils far away from the ink reservoir without any apparent path from the reservoir.
Also, what is the purpose of that whole clear section near the tip of the pen where the coils are found I realize the reservoir needs some kind of pressure equalization to keep writing and there appears to be a small notch on the outside of the chamber that might serve that purpose.
If you know these answers or have any hypotheses, please share
Edited by orion573, 12 June 2009 - 18:50.