What crucial mechanical element delivered the ink to the page?
Answer
A tiny, precision-made ball bearing set in a socket.
The central mechanical innovation involved placing a small, rotating ball bearing in a socket at the pen's tip. As this ball rotated across the paper, it picked up the viscous ink and transferred it to the writing surface.
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Invention of A Pen | The Dr Binocs Show | Peekaboo Kidz - YouTube
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