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Although all this is relatively simple to describe, the realization of a good functioning depends on succeeding in making this complex balance of gravity, pressure and capillarity work, and it is therefore essential that a correct coupling between [[nib]] and [[feeder]] occurs. Still today it happens to find fountain pens that present more or less marked problems of operation, like difficulty to start the writing or ink losses.  

Although all this is relatively simple to describe, the realization of a good functioning depends on succeeding in making this complex balance of gravity, pressure and capillarity work, and it is therefore essential that a correct coupling between [[nib]] and [[feeder]] occurs. Still today it happens to find fountain pens that present more or less marked problems of operation, like difficulty to start the writing or ink losses.  

Fu proprio in questo campo che ebbe luogo l'innovazione introdotta da ''Lewis Edson Waterman'' che spesso viene indicata, in maniera infondata, come l'invenzione della prima stilografica. Questi per migliorare la trasmissione dell'inchiostro verso il pennino eseguì una serie di incisioni sull'alimentatore creandovi una sorta di ''canali'' su cui l'inchiostro potesse scorrere per capillarità senza però debordare e lasciando spazio sufficiente per consentire all'aria di entrare nel serbatoio della penna. Produsse così uno dei migliori e più affidabili alimentatori del suo tempo, il cui successo è alla radice della esagerata pretesa di aver creato ''"the first practical fountain pen"''.

It was in this field that the innovation introduced by ''Lewis Edson Waterman'' took place, which is often referred to, in an unfounded way, as the invention of the first fountain pen. In order to improve the transmission of the ink towards the nib, he made a series of engravings on the feeder creating a sort of "channels" on which the ink could flow by capillarity without overflowing and leaving enough space for the air to enter the pen tank. He thus produced one of the best and most reliable feeder of his time, whose success is at the root of the exaggerated claim to have created "the first practical fountain pen".

[[Categoria:Tecnica]]

[[Categoria:Tecnica]]