How does a ballpoint pen draw ink?
The Rolling Ink Ball
How does a ballpoint pen draw ink?
You press a pen to paper and boom — a perfect blue line appears. No dipping in an inkwell, no mess, just smooth, instant writing. But how does the ink get from inside the pen onto the page?
The secret is hiding at the very tip of the pen: a tiny metal ball, smaller than a pinhead. That ball is sitting snugly in a socket, like a ball bearing in a wheel. When you write, the ball rolls.
