A ballpoint pen is a writing instrument with an internal ink reservoir and a sphere for a point. The internal chamber is filled with a viscous ink that is dispensed at its tip during use by the rolling action of a small sphere. The sphere, usually from 0.5 mm to 1.2 mm in diameter, may be made of brass, steel, tungsten carbide, or any durable, hard (nondeformable) material.
The gift manufactures of economical, reliable ballpoint pens arose from experimentation, modern chemistry, and the precision manufacturing capabilities of 20th century technology. Many patents worldwide are testaments to failed attempts at making these pens commercially viable and widely available. The ballpoint pen went through several failures in design throughout its early stages.
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. Loud's pen had a small rotating steel ball, held in place by a socket. Although it could be used to mark rough surfaces such as leather, as Loud intended, it proved to be too coarse for letter writing and was not commercially viable.
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 stationery manufacturers.
László Bíró, a Hungarian newspaper editor, was frustrated by the amount of time that he wasted in filling up fountain pens and cleaning up smudged pages, and the sharp tip of his fountain pen often tore the paper. Bíró had noticed that inks used in newspaper printing dried quickly, leaving the paper dry and smudge free. He decided to create a pen using the same type of ink. Since, when tried, this viscous ink would not flow into a regular fountain pen nib, Bíró, with the help of his brother George, a chemist, began to work on designing new types of pens. Bíró fitted this pen with a tiny ball in its tip that was free to turn in a socket. As the pen moved along the paper, the ball rotated, picking up ink from the ink cartridge and leaving it on the paper. Bíró filed a British patent on 15 June 1938.
Earlier pens leaked or clogged because of incorrect viscosity of the ink, and depended on gravity to deliver the ink to the ball. Depending on gravity caused difficulties with the flow and required that the pen be held nearly vertically. The original Biro pen used capillary action and a piston that pressurised the ink column, solving the ink delivery flow problems. Later Biro pens had a spring that kept pressure on the piston, and still later the Biro pens used just gravity and capillary action.
In 1941 the Bíró brothers and a friend, Juan Jorge Meyne, fled Nazi Germany and moved to Argentina. On 10 June they filed another patent and formed Bíró Pens of Argentina. The pen was sold in Argentina under the Birome brand (portmanteau of Bíró and Meyne), which is how ballpoint pens are still known in that country. László was known in Argentina as Ladislao José Bíró. This new design was licensed by the British, who produced ball point pens for RAF aircrew as the Biro; they found they worked much better than fountain pens at high altitude, the latter being prone to ink-leakage in the decreased atmospheric pressure stationery accessories.
