Hi all, so a long time ago I got a kitless pen from a friend, and it has this issue where if I cap and uncap it frequently when writing, the inside of the cap gets filled with ink. It is to the point where the first quarter of the section has a solid layer of ink. I was researching why this may be, and I'm guessing that it's due to a buildup of air pressure in the cap when it gets screwed on, which forces air into the pen because it wants to equalise with the pressure in the air pocket in the converter, which then makes ink leak out of the nib. I am interested in making kitless pens (I haven't made one yet but have been doing lots of research) so I am wondering how to avoid this problem?
How to avoid air pressure building up in the cap which makes ink leak out of the nib?
- Thread starter cjenkins
- Start date
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darrin1200
Member
Many commercial pen designs, use a tiny hole in the cap to equalize the pressure.
The trick is finding the balance of the equalization without the nib drying out.
The trick is finding the balance of the equalization without the nib drying out.
NJturner
Member
As @darrin1200 said, tiny hole is the solution since your pen threads must be really well done to be that air tight. Positioning of the hole allows venting while helping to prevent drying of the nib. Newton Pens has a good description and pictures on this - Newton Pens
Kevin