Why Don La Greca can never, ever own a retractable pen | Bob's Blitz

Why Don La Greca can never, ever own a retractable pen

A ballpoint pen seems simple: press a button you can write, press again and put it in your pocket. Yet inside a clever mechanisms turns that simple push into all sorts of other motions.

This video uses detailed animation to look inside the iconic Parker Jotter ink pen and see how it works.



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