The convenient dry-copying process for printed pages is among the truly revolutionary inventions of the century. In 1937 Chester Carlson, a New York patent attorney, developed the concept of applying an electrostatic charge on a plate coated with a photoconductive material. On November 22, 1938, Carlson dusted powder dyed with evergreen spores across an exposed plate and transferred the imprint to the surface of a paper.
Electrostatic Charge
![Xerography](/sites/default/files/styles/landmark_node_/public/landmarks/images/Xerox_Copier_Model_A.jpg?itok=eNrzE002)
YearAdded:
Image Credit: Courtesy Xerox CorporationImage Caption: XerographyEra_date_from: 1948
1983
Innovations
![Xerography](/sites/default/files/styles/thumbnail/public/landmarks/images/Xerox_Copier_Model_A.jpg?itok=FhFAWRx3)
The convenient dry-copying process for printed pages is among the truly revolutionary inventions of the century. In 1937 Chester Carlson, a New York patent attorney, developed the concept of applying an electrostatic charge on a plate coated with a photoconductive material. On November 22, 1938…
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