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عمومی::
نوک
But, when Bíró tried to fill a fountain pen with the quick-drying ink, he discovered that it was far too viscous to flow through the nib.
Finally, ballpoint pens also often include a top cap, which is either fitted to the front of the pen as a covering for the nib, or the back of the pen as a twist device for the retraction mechanism.
The vital key to what makes a ballpoint pen tick is its bearing ball, which is found at the very tip of the nib.
In contrast, a fountain pen should usually be stored with the nib upright, especially if carried in a bag or pen case.
Nib:
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