Ball Pen Kathu Nangal Amritsar

BALL PEN A pen is a tool used for writing or Drawing with a colored fluid such as ink. A ball point pen is a pen that uses a small rotating ball made of brass , steel or tungsten carbide to disperse ink as you write.

Ball point design The key to a ball point pen is , of course the ball .This ball acts as buffer between the materials you’re writing on and the Quick – drying ink inside the pen. The ball rotates freely and rolls out the ink as it is continuously fed form the ink reservoirs casually a narrow plastic tube filled with ink.

The ball is kept in place –between the ink reservoir and the paper-by a socket; and while it is in tight, it still has enough room to roll around as we write. As the pen moves across the paper the ball turns and gravity forces the ink down the reservoir and on to the ball where it is transferred on to the paper. The back of the ball is exposed so it can pick up ink from the reservoir. It is rolling mechanism that allows the ink to flow on to the top of the ball and roll on to the paper and reeling the ink from the air so it does not dry in the reservoir. 0.5 mm pen has a ball that will produce a line of 0.5 mm wide. Tip of the ball point is do tiny it is hard to visualized the working of ball socket actually work. Presented By :-Roll No.

Name of the student Prabhjot Kaur Navpreet Kaur Harpreet Kaur Gagandeep Kaur

Class VIIITH B VIIITH B VIIITH B VIIITH B

Guided By :Mrs. Mandeep Kaur Mrs. Meenkashi

References :o Science book of class XTH

o Microsoft Encarta encyclopedia