Assertion: ballpoint pen's pen | /r/CapableOf | use capillary action
Facets:
value: to funnel ink
type: PURPOSE
Source sentences:
text: Felt tip pens have a thin, felt nub at the tip of the pen that uses capillary action to funnel ink from the pen cartridge to the paper, much like a ballpoint pen.
text: Again with the help of his brother George, László was able to develop a pen which used capillary action to draw the ink towards the tip.