Ballpoint Pen

Topics: Ballpoint pen, Fountain pen, Pen Pages: 3 (1098 words) Published: December 6, 2012
Ballpoint pen

Ballpoint pen is a pen that used nowadays, using a smooth rolling point of the tip in the pen. Unlike fountain pen, you don’t need to fill in ink for writing.

The first patent on a ballpoint pen was issued on 30 October 1888, to John Loud, a leather tanner, who was attempting to make a writing instrument that would be able to write on his leather products, which then-common fountain pens could not do.

In the period between 1904 and 1946, particularly alternatives or improvements to the fountain pen were invented. Slavoljub Eduard Penkala invented a solid-ink fountain pen in 1907, a German inventor named Baum took out a ballpoint patent in 1910, and yet another ballpoint pen device was patented by Van Vechten Riesburg in 1916. In these inventions, the ink was placed in a thin tube whose end was blocked by a tiny ball, held so that it could not slip into the tube or fall out of the pen. The ink clung to the ball, which spun as the pen was drawn across the paper. These proto-ballpoints did not deliver the ink evenly. If the ball socket were too tight, the ink did not reach the paper. If it were too loose, ink flowed past the tip, leaking or making smears. Many inventors tried to fix these problems, but without commercial success.

The principle of ballpoint pen is under the dual role of atmospheric pressure and ink gravity, the ink goes through the pipeline to seat beads, it would adhesion on the ball. When you write on paper, the ink would appear from the ball which is rolling. The ink by the downward force of gravity, and friction on the paper by rolling ball, the pressure of the pen using the ink tube of the air out, you can resume writing function. You can see the tip has a diameter of about 0.1cm of the “small ball”, which is made by an alloy of chrome and steel. Also, a pen has the air inside that will cause the ink inside the pressure bar.

Oil-based ballpoint pen – the ink viscosity is high, strong water-resistant, but it has more...
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