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To keep the pressure equalized. If you have a pen with no hole, and were to take it up in an airplane, or even to the top of a building, the pressure difference could cause the ink to flow out of the pen creating a mess and making writing really messy.
There is a hole in the body of the Compressed polystyrene to equalise atmospheric pressure, for the reasons stated above, however the hole in the top of the lid is to prevent children for sucking the lid into their throat, subsequently this provides an air passage in such a case.
What else can I help you with?
Which side of the pen is the top?
The tip of the pen is the top because that's where you would put the pen cap
Which end of a pen is the top?
The opposite end to where the pen would write
Explain why a hole is usually provided on the wall of a biro pen?
The hole is for equalizing air pressure that allows the ink to flow smoothly. Without the hole, a vacuum can form inside the pen, preventing ink from being dispensed properly.
What is the purpose of ballpoint pens have a small hole in the main body of the pen?
The small hole in the main body of a ballpoint pen is known as a pressure-equalizing vent. It helps regulate the air pressure inside the pen, preventing leaks and ensuring smooth ink flow.
Why do Bic pens have a hole in the middle?
If it was completely airtight, then the pressure inside would drop, preventing ink flow. Placing a hole in the middle equalises the pressure and controls the flow of ink. The hole, basically, stops the pen from leaking ink.
Why is there a hole in the end of some pen lids?
to stop the ink from drying up
What are pen lids made out of?
plastic
How many people die per year from chewing pen caps?
Zero, pen lids don't kill anyone. Ha, take that, Ollie!
What do you call the rubber circle around the top of cup lids?
The rubber circles around the top of cup lids are buttons to mark what type of drink it is such as diet and other.
Which side of the pen is the top?
The tip of the pen is the top because that's where you would put the pen cap
Can you keep snails in jars with lids?
you can put them in jars with lids only if you put holes on the top which you can drill in i hope i was a good help
why are circular?
if you are refering to the lids that you see on the streets its that the lid will not fall into the hole, also most piping is circular
Is it the top of the pen or the lid of the pen?
I would think that it would be called the pen cap or the cap of a pen. Top of the pen or pen top may also be used. But I don't really believe that the lid of a pen is the correct use of the word "lid" in the phrase.
Which end of a pen is the top?
The opposite end to where the pen would write
Why are sewers circular?
if you are refering to the lids that you see on the streets its that the lid will not fall into the hole, also most piping is circular
Where is Vole hole 2 HorseIsle?
Where is Vole Hole 2?Vole hole 2 is in appleton, below the " rent a horse " pen.
Explain why a hole is usually provided on the wall of a biro pen?
The hole is for equalizing air pressure that allows the ink to flow smoothly. Without the hole, a vacuum can form inside the pen, preventing ink from being dispensed properly.
