|Filling Instructions: Lever-Fillers|
Lifting the lever compresses the ink sac; after placing the nib in ink, close the lever and count to ten to allow the sac to reinflate completely.
For those few lever-fillers with internal breather tubes (some Skylines, for example), repeating the above procedure for a second time may fill the sac more completely. If no bubbles appear in the ink, however, the repetition is unnecessary.
Occasionally one will run across two-piece jointed levers; these function just like conventional levers. An exception is the system used on the Waterman Ink-Vue pens of the late 1930s and early 1940s, which is actually a hybrid using the lever as a pump. Ink-Vue levers must be operated repeatedly, until bubbles are no longer expelled with each stroke.
Lever-fillers are simple and robust, and generally quite easy to repair. It is important not to force a stuck lever against an old hardened sac, however, since it then becomes quite easy to do serious damage to the lever, lever box, or barrel.