Essay about Pen

 The pen is one of the oldest important communication tools of mankind for writing or drawing with ink or other fluid. Throughout history, people of history have used pens for business and to record their thoughts and events on earth. Today, typewriters have replaced most pens in most office correspondence, but they are still used in official pens. All pens have tools that allow the ink to flow in a restrained manner on paper or other materials. Some old pens have to be constantly inserted into ink or into medicine to write, but most current pens have a reservoir that holds some ink.

Currently, the three main types of pens are the pen, the ballpoint pen, and the felt pen.

1- Calligraphy pen

Any pen that comes with a composite repository is a pen, but the term is commonly used for pens that have a slotted stylus.

In most pens, the composite magazine can be replaced either in a plastic cartridge or in a permanent tank in the form of a rubber bag. These tanks are located in the hollow of the pen body. In all pens, delicate ducts connect the pen head to the ink tank. From these ducts, air enters the tank and stops in the upper space of the compound. Due to the air, the ink flows through a duct connected to the pen head. At the back of the pen is a body made of rubber or plastic, which in Persian is called charcoal. The ink stays in the shoulder slits like that and does not spill on the paper all at once. As long as these extra inks remain, he writes with a pen, after which the way for air to enter the tank is left open, and the ink enters the vat again. The pen of the pen has a cap that covers the head when the pen is idle. The cap prevents the compound from evaporating and also damages the pen head.

2- Automatic bullet

This pen has largely replaced the pen in recent years, and the reason for its popularity is that, like the pen, it does not need to be filled in frequently. At the head of this pen, there is a very small bullet or bullet which, under the duct connected to the ink tank, is placed in a hole and less than half of it is out of the hole. , Turns the bullet and transfers the ink to the paper. The bullet is made of a hard material such as tungsten carbon or metal and sometimes yawn. The automatic ink has a syrupy consistency, in which case the fluid (ball) is placed in the open head tank of the ink on it and gradually decreases with air pressure and always prevents the ink from spilling. In some automatics, the ink is even thicker. And it does not have a ball. Whenever the ink runs out, they change the ink tank automatically.

 

Felt automatic

These pens are used for writing on paper, metal, glass, plastic and many other things. The ink or other fluid comes from the bullet or from the ink-impregnated wick to the porous tip of the pen. The tip of the pen, which is usually made of felt or plastic, is very flexible. The line written with this pen is wider than the line written with a stylus or a ballpoint pen. The ink pen is colorful and very colorful and dries quickly.