How it works
Two pens taken apart. A click ballpoint hides a spring and a refill in its barrel, and a fountain pen feeds ink from a converter, through the feed, to a split nib.
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How a click pen works
Pressing the push button turns a small cam inside the barrel, the thrust device, which holds the refill out. Press again and the spring pulls the refill back. At the tip, a tiny ball rolls ink onto the paper.
Parts of a fountain pen
Ink flows from the converter, or a cartridge, through the section and along channels in the feed to the nib. It reaches the paper down the slit between the two tines, which starts at the breather hole.
Questions and answers
What is the metal tip of a fountain pen called?
The nib. Its two halves are the tines, and the fine cut between them is the slit, which ends at the breather hole.
What is the part of a pen you click?
The push button, or plunger. It works a cam called the thrust device, which pushes the refill out or lets the spring pull it back.
What is the difference between a converter and a cartridge?
Both hold a fountain pen's ink. A cartridge is sealed and thrown away when empty; a converter is refilled from a bottle.