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The first truly efficient and functional automatic filling system based on the compression of a rubber tank was the famous ''crescent filler'', designed by Roy [[Conklin]]' who patented it in 1901 ({{Cite patent|US|685258}}), which was introduced to the market by the company of the same name founded by him, the first example of the success of a brand due to the invention of an innovative filling mechanism.

<noinclude>{{ReferBox|Filling systems}}</noinclude>The first truly efficient and functional automatic filling system based on the compression of a rubber tank was the famous ''crescent filler'', designed by Roy [[Conklin]]' who patented it in 1901 ({{Cite patent|US|685258}}), which was introduced to the market by the company of the same name founded by him, the first example of the success of a brand due to the invention of an innovative filling mechanism.

[[Image:CrescentFillerSchema.svg|center|500px|Diagram of a pen with ''crescent filler'']]

[[Image:CrescentFillerSchema.svg|center|500px|Diagram of a pen with ''crescent filler'']]

To avoid accidentally pressing the ''crescent filler'' the pens were also equipped with a ring retainer that went to fit into the slot under the bow, so that it was locked in an open position outside the pen. When it was necessary to load the pen it was enough to rotate the ring, cut on one side, to bring the position of the cut in correspondence of the slit, so that the bow could go down.  

To avoid accidentally pressing the ''crescent filler'' the pens were also equipped with a ring retainer that went to fit into the slot under the bow, so that it was locked in an open position outside the pen. When it was necessary to load the pen it was enough to rotate the ring, cut on one side, to bring the position of the cut in correspondence of the slit, so that the bow could go down.  

Il sistema era semplice ed efficace, e consentiva anche un caricamento migliore rispetto al successivo [[caricamento a levetta|riempimento a levetta]], in quanto si poteva comprimere completamente il serbatoio di gomma. Nonostante la sua superiorità tecnica però, la sporgenza dell'archetto dal corpo della penna risultava parecchio sgradevole dal punto di vista estetico, e questo ne decretò l'inesorabile declino.<noinclude>

The system was simple and effective, and also allowed for better filling than the later [[lever filler]], as the rubber tank could be completely compressed. Despite its technical superiority, however, the projection of the bow from the body of the pen was quite unpleasant from an aesthetic point of view, and this decreed its inexorable decline.<noinclude>

==Brevetti correlati==

==Related Patents==

{{ListaBrevettiFeature|Crescent filler}}

{{ListsPatentsFeature|Crescent filler}}

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