Fountain pens are known among men with a penchant for delicate and high quality calligraphy skills. These come highly recommended for anyone who is new to ink based writings.The royal touch and metallic finesse with which these pens are manufactured is a soft reminder of their rich past, rendering to them an aesthetic appeal of yesteryears. Invented in the late 19th century by Lewis Waterman, fountain pens have undergone several improvisations under several legendary brands like Parker and Sheaffer.  Available in multiple designs, fountain pens are very interesting objects.The internal structure of an ink pen varies with each manufacturer, but generally depends on the type of ink filling mechanisms used.  Several mechanisms for ink filling exist, depending on the suction method used which could be vacuum based filling or capillary based. Mechanisms like cartridge filling, piston filling, plunger filling and squeezer filling have been widely used.