One of the oldest techniques used to fill fountain pens. Originally developed from German brands and from the U.S. Conklin "Nozac" , it consists in a piston activated from a non-ending screw under the blind cap or directly connected to the blind cap.
- Unscrew the cap of the pen and the prospective cover at the bottom of the barrel
- Turn the knob at the bottom of the barrel counterclockwise to empty the ink reserve
- Turn the knob clockwise to fill the pen holding the nib completely immerged in the ink
- Release a few drops back into the ink well
- Again, turn clockwise to finish filling by holding the nib pointed upwards
- Carefully wipe using Visconti blotter or a soft tissue.