valejoa26
valejoa26
26-04-2017
Physics
contestada
How do pens only release ink when being used?
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Odettexoxox
Odettexoxox
26-04-2017
If it's a ballpoint, then the ball tip rotates and dispenses ink with every movement. The problems with the mechanics are that the ballpoint sometimes disperses the ink unevenly : /
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