How is it a ballpoint pen which did not work previously, miraculously starts working again when you make a few scratches with it on paper? What’s the mechanism behind it?
In: Engineering
There is a literal ball in the end, and as you move the pen it rolls around, bringing ink on it’s surface from inside the pen to the paper. If it sits for a while, the ink dries, but a quick scribble rubs off any dried ink and gets fresh ink flowing again.
Latest Answers