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In order to write it is necessary to unscrew the bottom and slightly withdraw the shaft attached to it, so as to retract the piston from its blocked position and re-enable the flow of ink towards the nib. Closing the bottom will stop the ink flow again, thus preventing leaks.
compressio of the ''sac'' ==
At the beginning of the 1900's, there was a great impulse in the search for a system that would allow the filling operation to be carried out automatically. During this period, a series of filling systems began to be produced, in which the ink was kept inside an elastic rubber sac. In this way it was possible to carry out the loading by compressing the empty sac, so as to exploit the subsequent expansion of the same to suck the ink from the bottle by immersing the nib assembly.
Caricamenti a sfiatatoio ==
These filling systems have in common the use of the presence of a ''[[breather tube]]'' which allows to perform the refill by repeating several times some mechanical action (different depending on the different filling systems) which allows to create a compression of the air inside the pen tank. The variety of ways in which this compression is carried out has been extremely wide, but in most cases provides some mechanism that acts on a flexible bulb.
=== ''[[plunger filler]]'' ===
=== ''[[piston filler]]'' ===
=== ''[[capillarity filler]]'' ===
=== ''[[cartridge filler]]'' ===
=== ''[[converter]]'' ===
Riferimenti esterni ==* http://www.pennaio.com/Sistemi_di_Riempimento.html* http://www.richardspens.com/?page=ref/fillers/fillers.htm* http://www. rickconner. net/penspotters/filling .html* http://www.rickconner.net/ penoply/filling.html* http:// www. vintagepens. com/ filling_instructions_vintage_pens.shtml * http://www.pentrace.net/penbase/Data_Returns/full_article.asp?id= 266* http://www.pentrace.net/penbase/Data_Returns/full_article.asp?id= 259&tname=Technical* http://www.penhero.com/PenGallery/Parker/ParkerDuofoldFiller.htm* https://www.penexchange.de/english/sites/klassiker/kolbenfueller.html* http://www.penexchange.de/english/sites/klassiker/pneumatik.html* http://www.penexchange.de/english/sites/klassiker/selbstfueller.html * http://kamakurapens.invisionzone.com/index.php?showtopic=1057&st=0&p=5173&#entry5173
Ringraziamenti == Un grazie di cuore a Fabio Moricci, il [http://www.pennaio.com/ Pennaio], che ci ha gentilmente concesso l'uso dei suoi schizzi come base per la realizzazione degli schemi tecnici dei vari sistemi di caricamento.