There are two key ways to fill a pen: through ink cartridges or auto-fill. Although the use of ink cartridges is very convenient and easy to use, the automatic filling program attaches more importance to ink cartridges.

 

    There are two techniques for making a pen self-contained: a lever filler and a button filler. All the fillings have had some success, but some concerns have been raised in the area of regular maintenance. The self-filling pen design includes the lever filler, the button filler, the contorted filler, the blow molding filler, the pump filling, the vacuum filler, the sleeve filling and the piston filling technology. Custom pen design has published several different patents. Here are six historical inventions of self-filling design that shape the future of pen's global longevity:

 

    1. Button packing: patented in 1905 and first provided by parker pen in 1913. This is an alternative to the pipette method used by parker for his famous Duofold series.

 

    2. Leverage: Walter Sheaffer was granted a patent for a lever filler in 1908. The WA Sheaffer Company of Fort Madison, Iowa, introduced it in 1912. The external lever presses against the flexible ink sac. When not in use, the handle is flush with the pen.

 

    3. Crescent fillers: Roy Conklin of Toledo produced the first item that was later called click-type fillers. When the two protruding labels on the outside of the pen are pressed, the label will click when the label is full.

 

    4. Coin fillers: the fillers for the use of COINS were developed by lewis edsenwaterman to compete with Sheaffer's award winning lever fillers. A slot in the steel pen cylinder allows the coin to deflate the internal pressure plate, which is similar to the match rod packing.

 

    5. Match stem packing: Weidlich is estimated to have been introduced around 1910. A hole on the side of the barrel pushes the press bar with a matchstick.

 

    6. Piston filler: star product launched in 1930, when German company Pelikan obtained the technical license and used it for the first automatic pen Pelikan 100.