Aerometric

Filling systems

It was introduced by Parker in 1948, as a new filling system adopted on the 51 in place of the previous vacumatic. Actually for the operating modes this system is very similar to the sleeve filler used by LeBoeuf, because it is based on the pressure of a rubber sac to be made by a side opening on the metal cylinder that contains the same, which is accessed by unscrewing the pen body from the nib section.

Unlike the classic sleeve filler the aerometric filler however provides for the presence of a breather inside the system, which requires to repeat the pressure of the bar four or five times (as shown on the instructions engraved on some of them) to complete the loading. It can therefore be interpreted as a fusion between a sleeve filler and the previous vacumatic filler.

In realtà il nome aerometric viene usato in questo senso per lo più dai collezionisti, l'azienda faceva piuttosto riferimento con il nome di Aero-metric Ink System (riportato ad esempio in pubblicità come questa) all'insieme del sistema di caricamento (chiamato Foto-fill filler), dell'alimentatore e del nuovo serbatoio in PVC (chiamato Pli-glass), cosa che consentiva all'azienda di proclamare la penna come non contenente nessuna parte in gomma.