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The paper clip patented by Vaaler in 1899 and 1901 Postage stamp issued in 1999 to commemorate Vaaler's alleged invention of the paper clip. The clip depicted is the common Gem clip, not the one patented by Vaaler. Giant paper clip erected in 1989 in Sandvika, Norway, to honor Vaaler's invention. This 23-foot-tall (7 m) clip is the Gem, not the ...
By the end of the 19th-century almost all printers in the western world were using wood instead of rags to make paper. [119] Together with the invention of the practical fountain pen and the mass-produced pencil of the same period, and in conjunction with the advent of the steam driven rotary printing press, wood based paper caused a major ...
A clipboard is a thin, rigid board with a clip at the top for holding paper in place. A clipboard is typically used to support paper with one hand while writing on it with the other, especially when other writing surfaces are not available. The earliest forms were patented in 1870–1871 and referred to as board clips. [1]
Cai Lun then initiated the idea of making paper from the bark of trees, hemp, old rags, and fishing nets. He submitted the process to the emperor in the first year of Yuanxing [105] and received praise for his ability. From this time, paper has been in use everywhere and is universally called the "paper of Lord Cai."
This sub-section is about paper making; for the writing material first used in ancient Egypt, see papyrus.. Paper: Although it is recorded that the Han dynasty (202 BC – AD 220) court eunuch Cai Lun (50 AD – AD 121) invented the pulp papermaking process and established the use of new materials used in making paper, ancient padding and wrapping paper artifacts dating from the 2nd century BC ...
Before paper was invented, the ancient Chinese carved characters on pottery, animal bones and stones, cast them on bronzes, or wrote them on bamboo or wooden strips and silk fabric. These materials, however, were either too heavy or too expensive for widespread use. The invention and use of paper brought about a revolution in writing materials.
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After the slide was removed, a mirror image of the words remained. Carlson tried to sell his invention to some companies, but because the process was still underdeveloped he failed. At the time multiple copies were made using carbon paper or duplicating machines and people did not feel the need for an electronic machine.