Definitions for "Vent hole"
Keywords:  nib, depthof, weeping, hole, escape
the hole in the nib at the end of the slit; some dip pen nibs are ventless
("weeping hole") - A small hole drilled in the rising main below the depthof frost penetration during winter. It is used to prevent frost burst in cold climates.
Hole in the nib which allows air to displace ink in the bladder or barrel. Also could be on the feed instead of the nib.
Keywords:  port, see
See 'Vent Port'