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[[Image:Parker-Duofold-Mandarin-Exploded.jpg|thumb|A [[Duofold]] disassembled with the pen barrel in the center.]]
 
[[Image:Parker-Duofold-Mandarin-Exploded.jpg|thumb|A [[Duofold]] disassembled with the pen barrel in the center.]]
  
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Il fusto, o corpo, (''barrel'' nel mondo anglosassone) è in genere la parte di maggiore dimensione di una penna stilografica. Nelle penne moderne con caricamento a cartuccia non ha praticamente altro ruolo che quello di fornire un supporto per l'uso della penna e coprire la cartuccia, ma inizialmente, quando le penne erano caricate a contagocce, veniva utilizzato direttamente come serbatoio dell'inchiostro.  Questo ruolo viene svolto ancora oggi con alcuni [[sistemi di caricamento]] come quello a [[caricamento a stantuffo|stantuffo]] o a [[siringa rovesciata]], nel qual caso è spesso dotato di parti trasparenti (finestrelle o intere sezioni) per consentire la visualizzazione del livello dell'inchiostro.  
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The barrel, or body is usually the largest part of a fountain pen. In modern cartridge filled pens it has practically no other role than to provide support for the use of the pen and cover the cartridge, but initially, when the pens were loaded with droppers, it was used directly as an ink tank.  This role is still played today with some [[filling systems]] such as the [[piston filler]] or [[plunger filler]], in which case it is often equipped with transparent parts (windows or entire sections) to allow the display of the ink level.  
  
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[[File:Sheaffer-Balance-Lever-OS-JadeGreen-Inscr.jpg|thumb|left|Esempio di iscrizione sul corpo di una [[Balance]].]]
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[[File:Sheaffer-Balance-Lever-OS-JadeGreen-Inscr.jpg|thumb|left|Example of inscription on the body of a [[Balance]].]]
  
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Anche quando l'inchiostro non è contenuto direttamente nel corpo, o in una parte dello stesso, ma in un serbatoio separato, come per tutti i sistemi di caricamento che prevedono l'uso di un sacchetto in gomma, il corpo svolge comunque il ruolo di contenitore sia per quest'ultimo che per il meccanismo di caricamento stesso. Inoltre, specialmente nelle produzioni fino agli anni '40, era tipico trovarvi le incisioni del marchio e del nome del produttore (oltre che degli eventuali brevetti della penna).
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Even when the ink is not contained directly in the barrel, or in a part of it, but in a separate tank, as with all loading systems that use a rubber bag, the body still plays the role of container both for the latter and for the filling mechanism itself. Moreover, especially in the productions up to the '40s, it was typical to find the engravings of the brand and of the name of the producer (as well as of the possible patents of the pen).
  
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Inizialmente, anche per la maggiore facilità di lavorazione, era realizzato in forma cilindrica con estremità piatte (il cosiddetto ''[[flat top]]'') ma in seguito all'evolversi delle tendenze stilistiche si è passati a forme più affusolate (con la nascita del cosiddetto stile ''[[streamlined]]''). Inoltre con l'evolversi delle tendenze stilistiche dalla ordinaria sezione rotonda si è passati a forme sfaccettate, triangolari, quadrate, ottagonali, dodecagonali, ecc.  
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Initially, also for the greater facility of working, it was realized in cylindrical form with flat ends (the so-called ''[[flat top]]'') but following the evolution of the stylistic tendencies it has been passed to more tapered forms (with the birth of the so-called ''[[streamlined]]'' style). Moreover, with the evolution of stylistic trends from the ordinary round section, we have moved to multifaceted, triangular, square, octagonal, dodecagonal forms, etc.  
  
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Oltre al differenziarsi per le varie forme adottate dai produttori, il corpo ha subito anche l'evoluzione nell'uso dei [[materiali]] impiegati nella costruzione delle stilografiche, di cui appunto costituisce il componente più grande. Agli albori delle stilografiche era prevalentemente costruito in [[ebanite]] come il resto della penna, materiale che garantiva, dovendo servire da serbatoio dell'inchiostro, la necessaria resistenza chimica.  
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In addition to differentiating itself for the various forms adopted by the producers, the barrel has also undergone the evolution in the use of the [[materials]] used in the construction of the fountain pens, of which it constitutes the largest component. At the dawn of the fountain pens it was mainly made of [[hard rubber]] like the rest of the pen, a material that guaranteed, having to serve as an ink tank, the necessary chemical resistance.  
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With the development of the technology all the other [[materials]] have been used then, starting from the [[metal]] (the first were probably the [[Wahl Metal Pen]]), the first artificial resins such as [[bakelite]], [[galalith]] and [[celluloid]], to pass in the '40s to the most common [[plastic resins]] still in use today. A photo gallery is on [[Body_Gallery|this page]].
  
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Con lo sviluppo della tecnologia sono stati utilizzati poi tutti gli altri [[materiali]], a partire dal [[metallo]] (le prime furono probabilmente le [[Wahl Metal Pen]]), alle prime resine artificiali come [[bachelite]], [[galalite]] e [[celluloide]], per passare negli anni '40 alle più comuni [[resine plastiche]] in uso ancora oggi.
 
 
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Versione attuale delle 21:42, 5 mar 2021

A Duofold disassembled with the pen barrel in the center.

The barrel, or body is usually the largest part of a fountain pen. In modern cartridge filled pens it has practically no other role than to provide support for the use of the pen and cover the cartridge, but initially, when the pens were loaded with droppers, it was used directly as an ink tank. This role is still played today with some filling systems such as the piston filler or plunger filler, in which case it is often equipped with transparent parts (windows or entire sections) to allow the display of the ink level.

Example of inscription on the body of a Balance.

Even when the ink is not contained directly in the barrel, or in a part of it, but in a separate tank, as with all loading systems that use a rubber bag, the body still plays the role of container both for the latter and for the filling mechanism itself. Moreover, especially in the productions up to the '40s, it was typical to find the engravings of the brand and of the name of the producer (as well as of the possible patents of the pen).

Initially, also for the greater facility of working, it was realized in cylindrical form with flat ends (the so-called flat top) but following the evolution of the stylistic tendencies it has been passed to more tapered forms (with the birth of the so-called streamlined style). Moreover, with the evolution of stylistic trends from the ordinary round section, we have moved to multifaceted, triangular, square, octagonal, dodecagonal forms, etc.

In addition to differentiating itself for the various forms adopted by the producers, the barrel has also undergone the evolution in the use of the materials used in the construction of the fountain pens, of which it constitutes the largest component. At the dawn of the fountain pens it was mainly made of hard rubber like the rest of the pen, a material that guaranteed, having to serve as an ink tank, the necessary chemical resistance.

With the development of the technology all the other materials have been used then, starting from the metal (the first were probably the Wahl Metal Pen), the first artificial resins such as bakelite, galalith and celluloid, to pass in the '40s to the most common plastic resins still in use today. A photo gallery is on this page.

Estratto da "http://www.fountainpen.it/index.php?title=Corpo/en&oldid=142364"