This is the figure of the inventor of the copier

This is the figure of the inventor of the copier

Chester Flood Carlson was born February 8, 1906 in the city of Seattle, Washington. His father had tuberculosis and he had to work hard to get medical expenses. At the age of 17 years his mother died and four years after his mother died Carlson's father followed. This did not discourage Carlson from learning. He was able to complete his education up to college, namely at the California Institute of Technology.
Carlson works for an electronics manufacturing company. His job at that time was to copy all patent documents and drawings into several documents. Carlson felt tired of the job and then thought about how to make his work easier by inventing the concept of electrophotography which we now know as photocopiers.
His efforts started in 1938, namely by experimenting with usingpowdered soot (carbon) and light irradiation and transferring a piece of writing from one medium to another. Apart from the concept of electrophotography, Carlson also uses the concept of hoto-conductivity, a process in which electrons change when exposed to light. In essence, with this process, the image can be multiplied by the process of changing the electron.
But most of the literature says that Carlson created the process of copying by using electrostatic energy, namely xenography. Xenography comes from the Greek "radical xeros" which means dry and "graphos" which means to write. Because the process does not involve chemical liquids, unlike previous technologies. Through this technique, Chester Carlson has found a way to change the paradigm of rewriting a document, which will later become a process called photocopying. This technique was later patented on October 6, 1942.
For several years Carlson tried to perfect this invention and tried various companies to sell his invention. However, because at that time Carlson's invention was considered useless and did not have a promising future, his findings were rejected.


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After trying very hard, Carlson got his first partner, the Batelle Memorial Institute, who was willing to fund it with money and effort. With his first partner, Carlson managed to convince Haloid, a mid-sized company, Haloid Corporation, New York, which sells photo paper, to become his partner to develop his findings.
The Haloid Company then changed the name of the first electro-photographic copier to the name Xerography. Xerography became commercial after being adopted by the Xerox Corporation.
The Xerox 914 was the first commercial copier

One of Xerox's early products was the Xerox 914, the first fully automatic photocopier to use the xenography process. Named the Xerox 914 to refer to the machine's ability to copy paper with a size of 9 inches x 14 inches (229 mm x 356 mm) and officially in 1958 with the name Xeroz 914.
Xerox 914 is very popular among the people. This Xerox 914 can copy up to 100 thousand papers per month. This product contributes to the company's revenue of up to 60 million US dollars. Until now, Xerox is the world's leading copier and printer company. Products produced by the company which is now headquartered in Stamford, Connecticut, USA in 2006 managed to record revenues of 15.9 billion US dollars. The number of employees reaches 53,700 people, spread all over the world.
Chester Carlson died on September 9, 1968, in Rochester, New York from chronic liver disease. Thanks to his invention of the copier, Chester Carlson has found a way to change the paradigm of rewriting a document. With Chester Carlson's invention, we now easily, cheaply and quickly duplicate a document.
source: https://kisahpenemu.wordpress.com/2010/02/27/penemu-machine-photocopy/