




This photo shows the internal component using an unfinished pen. You can see the long black tube is the sac for the ink. The long flat looking part is the pressure bar. When you want to fill the pen you unscrew the back (as seen in the photo) and push the back like a button. This bar is what bends when you push the button and squeezes the sac so when you release the button (and the pen is in ink) it will suck the ink into the sac.

Dan