One solution to avoid inky fingers at the junction of the section to the barrel is to avoid that joint altogether. Arguably the best known execution of this idea is the Parker Jointless fountain pen. A jointless pen, unlike a standard dropper filled fountain pen, just can’t leak on your fingers while you hold it. But the pen still needs a way to open it to fill it with ink. Parker patented a removable nib and feed, held together by a collar, that just pulls right out of an otherwise jointless single piece pen barrel and section.