Modifiche

<noinclude>{{ReferBox|Filling systems}}</noinclude>The filling system often referred to simply as ''snorkel'' (although this is only one of the components) was introduced by [[Sheaffer]] in 1952 with the [[Snorkel Pen]]. The system represents an evolution of the previous ''[[Touch Down]]'', and the filling mechanism in fact is exactly the same, and uses a pneumatic compression realized in the same way.

<noinclude>{{ReferBox|Filling systems}}</noinclude>The filling system often referred to simply as ''snorkel'' (although this is only one of the components) was introduced by [[Sheaffer]] in [[1952]] with the [[Snorkel Pen]]. The system represents an evolution of the previous ''[[Touch Down]]'', and the filling mechanism in fact is exactly the same, and uses a pneumatic compression realized in the same way.