I travel with mine, carried nib upright in my shirt pocket, and have never had a problem.
Originally Posted by Ru4scuba?
A piston filler is a type of ink filling system. Most modern pens use a cartridge, or a converter. Pelikan uses a piston system when fills exactly like a cartridge; the nib is submersed in ink, a knob is twisted, ink is sucked up through the nib into a holding area. RichardsPens.com has a very good write-up of the various filling systems.
"Hey careful, Man; there's a beverage here!!" - Dude Lebowski