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A ballpoint pen, also known as a biro [1] (British English), ball pen (Hong Kong, Indonesia, Pakistani, Indian and Philippine English), or dot pen [2] (Nepali English and South Asian English), is a pen that dispenses ink (usually in paste form) over a metal ball at its point, i.e., over a "ball point".
Bíró presented the first production of the ballpoint pen at the Budapest International Fair in 1931. [1] Working with his brother György, [3] [4] a chemist, he developed a new tip consisting of a ball that was free to turn in a socket, and as it turned it would pick up a special viscous ink from a cartridge and then roll to deposit it on the ...
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"Reynolds Rocket" pen was introduced at Gimbel’s department store in New York City, selling $100,000 worth of pens on the first day. [2] Demand in 1945 was running 30,000 pens per day, making it America's #1 ballpoint pen. [3] However, within three years the price of the pen went from $12.50 to 50¢.
The following is a non-exhaustive list of standardized tests that assess a person's language proficiency of a foreign/secondary language. Various types of such exams exist per many languages—some are organized at an international level even through national authoritative organizations, while others simply for specific limited business or study orientation.
The pen is available in many different ink colors, ranging from the classic blue, black, red, and green of traditional offices, to pink, purple, and other modern and artistic colors. The thick ink flows down due to capillary action from the tube inside the barrel, to feed the ball, which can rotate within a brass bearing. [ 13 ]
Close up of an extra fine roller ball pen next to something written with it. There are two main types of roller ball pens: liquid-ink pens and gel-ink pens.The "liquid-ink" type uses an ink and ink-supply system similar to a fountain pen, and they are designed to combine the convenience of a ballpoint pen with the smooth "wet ink" effect of a fountain pen.
Download as PDF; Printable version; In other projects Wikimedia Commons; Meta-Wiki; ... Hindi-language mass media (16 C, 4 P) Hindi-speaking people by occupation (7 C) L.