Modifiche

== External references ==

== External references ==

* http://www.pennaio.com/Sistemi_di_Riempimento.html

* [http://www.pennaio.com/Sistemi_di_Riempimento.html] Page of the original sketches used in this page

* http://www.richardspens.com/?page=ref/fillers/fillers.htm

* [http://www.richardspens.com/?page=ref/fillers/fillers.htm] Page on filling systems from Richard Binder's website

* http://www.rickconner.net/penspotters/filling.html

* [http://www.vintagepens.com/filling_instructions_vintage_pens.shtml] Page on filling systems from David Nishimura website

* http://www.rickconner.net/penoply/filling.html

* [https://web.archive.org/web/20180105095740/http://www.rickconner.net/penspotters/filling.html] Page on filling systems from Penspotters

* http://www.vintagepens.com/filling_instructions_vintage_pens.shtml

* [https://web.archive.org/web/20130616225156/http://www.pentrace.net/penbase/Data_Returns/full_article.asp?id=259] Article about filling systems on PenTrace, first part

* http://www.pentrace.net/penbase/Data_Returns/full_article.asp?id=266

* [https://web.archive.org/web/20130617013636/http://www.pentrace.net/penbase/Data_Returns/full_article.asp?id=266] Article about filling systems on PenTrace, second part

* http://www.pentrace.net/penbase/Data_Returns/full_article.asp?id=259&tname=Technical

* [http://www.penhero.com/PenGallery/Parker/ParkerDuofoldFiller.htm] Article of Jim Mamoulides  on [[Parker]]'s [[button filler]]s

* http://www.penhero.com/PenGallery/Parker/ParkerDuofoldFiller.htm

* [https://www.penexchange.de/english/sites/klassiker/kolbenfueller.html] Article on Penexchange on [[piston filler]]

* https://www.penexchange.de/english/sites/klassiker/kolbenfueller.html

* [http://www.penexchange.de/english/sites/klassiker/pneumatik.html] Article on Penexchange on pneumatic fillers

* http://www.penexchange.de/english/sites/klassiker/pneumatik.html

* [http://www.penexchange.de/english/sites/klassiker/selbstfueller.html] Article on Penexchange on [[button filler]]s

* http://www.penexchange.de/english/sites/klassiker/selbstfueller.html

== Notes ==

== Notes ==