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« Previous12

Writing Pens Milestones History by Manseo

There is a wide variety of writing pens nowadays. There are roller pens, pens, reed pens, feather pens, ballpoint pen, dip pens, gel pens, ballpoint pens antler, etc. Among the largest manufacturers of pens Parker Pens, Mont Blanc Pens, Waterman pens, Bic Pens, Cross Pens and more. This remarkable writing instrument, with the help of which you can leave a trace of ink on the paper surface, is an indispensable part of our lives.

The history of writing pens from antiquity, from the years around 3000 BC they were cut from stalks of reed. The English word "pen" (a writing pen) came from Latin "penna" meaning "feather of a bird. The best samples were made of large feathers of swans, turkey, roosters and geese. Archaeological discoveries in the ruins of Pompeii bronze variants of writing pens, but they were widely broadcast by the late eighteenth century. Laszlo Biro, taking into account the latest methods of manufacture of ball bearings for machines and weapons, added the ball mechanism of capillaries and presented the ballpoint pen in the world in 1944. The company Pentel stationery Tokyo became the first to introduce the world felt in 1960.

The time of the drafting of the road pens history is about 6000 years. Here are the main steps of it:

About British Columbia, 3000-4000 years old man dropped the wet clay with a bronze plaque or bone stick.

About 3000 years BC Egyptians began to use images in their compositions. Thin reed brushes or feathers have been used to make inscriptions on rolls of papyrus.
1300 BC Romans used metal pens to write on thin sheets of wax on wooden bars.

Middle Ages Anglo-Saxons began to use bars filled with wax out of parchment. They wrote with pens made of metal or bone, one end of which was refined and the other was used for deletion.
600-1800 AD Europeans discovered that the use of sharpened pencils changed the style of writing (writing). They first used capitals, but later they began to use small letters to increase the write speed.

1790ies. Regardless of slate pencil was invented in France and Australia.

1800-1850ies. metal pen was patented in 1803, but the patent was not used for commercial purposes. In the 19th century, metal pens completely replaced pens from goose feathers. In 1850, the use of fountain pens significantly decreased, as the quality of steel pens Higher advice were made with more heavy alloys of iridium, rhodium and osmium.

Invention of the ballpoint pen is officially dated from the end of the 19-th century. In 1888, John Loud took a patent in 1916 - Van Vechten Reisberg. Unlike these other patents have been used for commercial purposes.

Invention of the modern ballpoint pen is attributed to Laszlo Biro and George Biro. In summer 1943 the first industrial units have been manufactured. Patent rights were purchased by the British Parliament. Ballpoint pens were used by militaries during the Second World War because they were more convenient and reliable as the fountain pens.

In 1940ies ballpoint pens on the market of the United States. They were sold as the first who wrote under the pen. Ballpoint was a huge success. In one service department store in New York, more than 10,000 ballpoint pens were sold during a luncheon in October, 29 1945.

In 1953, the first cheap pens appeared at French Baron Bich of BIC Co, engaged in the manufacture of ballpoint pens, has managed to improve the process and reduces manufacturing costs. Bic pens are very cheap and quickly became very popular.

In 1960, Felt was invented in Japan. Felt soon appeared on the U.S.
Roller ball pens appeared in the early 1980s. They had a ball in motion and can use liquid ink that can write on paper smooth line. Technological advances of the late 1980s - early 1990s of roller ball considerably improved in all parameters.

1990s in pens with a rubber surface that reduces by pressing the pen came into force and have been widely adopted.

In 1997, mass production of Ring Pens began. These pens have been developed to write without pressing three fingers while writing.

Manseo author of wndpens.com that provides biggest collection of handcrafted Wood Fountain Pens, Writing Pens, Pen Display, Fountain Pen Ink, wood pen and more. To get visit us now!

Article Source: http://www.earticlesonline.com/Article/Writing-Pens-Milestones-History/574954

Bouncing Bearings on Liquid Metal

Faster Algorithm for Sphere Packing Discovered (Slashdot)

sciencehabit writes with an article in Science about a new way to pack spheres
into a cylinder. From the article: "One day, physicist Ho-Kei Chan of Trinity
College Dublin was playing with steel ball bearings, trying to pack them into
a little cylindrical tube in the most efficient way possible. It's a tricky
problem that can take even a powerful computer a week to calculate. But after
thinking about it for a while, Chan has figured out a way to simplify the
math. The advance could help engineers pack all sorts of spheres more
efficiently, from nano-sized buckyballs to Christmas tree ornaments. Another
potential application is liquid crystal displays such as those used in
televisions and computer monitors. If scientists could make liquid crystal
molecules obey these rules, they could potentially create a whole new class of
liquid crystals." One caveat is that the diameter of the cylinder can be at
most 2.7013 times as large as the diameter of the spheres being packed.

Read more of this story at Slashdot.

Slashdot