Question

how do atmospheric pressure help in filling the ink of an fountain pen​

Answer 1

Answer:

The pen draws ink from the reservoir through a feed to the nib and deposits it on paper via a combination of gravity and capillary action.

Some pens employ removable reservoirs in the form of pre-filled ink cartridges.

Explanation:

Yes, it works on the principle of equilibrium between internal and external atmospheric pressures. Fountain pen has a reservoir in it to store ink into it. When one puts the nib to paper with light pressure, the split of the nib widens and brings ink stored in the pen through the feed to the split of the nib by capillary action and the flow of ink begins.

The nib of the pen take ink through the reservoir via gravity and capillary action. Capillary action under which with which the liquid to flow against the gravity and rise to the thin walls of the capillary. This involves the adhesion and cohesion forces. Due to this capillary action the flow of ink controls in the pen.

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Answer 2

filling of ink into a fountain pen :

3. as a syringe is spilt with liquid due to the atmospheric pressure ink also gets filled into the fountain pen. the pen is kept with its nib inside ink . when the rubber tube of the fountain pen is squeezed almost all the air of the rubber tube expels out it from of bubbles through the ink. when the rubber tube is released the pressure inside the rubber tube is much less than the atmospheric pressure acting on the ink. as a result the air rises into the tube through the capillary below the nib of the pen

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