The distinguishing characteristic of a fountain pen is to be a tool combining a nib with an ink reservoir in a single writing instrument thus allowing long writing sessions without being continually interrupted by the need to re-dip the nib in the ink. | The distinguishing characteristic of a fountain pen is to be a tool combining a nib with an ink reservoir in a single writing instrument thus allowing long writing sessions without being continually interrupted by the need to re-dip the nib in the ink. |