22 окт 1938 г. - Xerox

Описание:

Chester Carlson invented a dry printing process called electrophotographic commonly called a Xerox.

It was a way of transmitting and printing facsimiles of printed images using a beam of directed ions directed onto a rotating drum of insulating material.

The ions would create an electrostatic charge on the drum. A fine powder could then be dusted upon the drum; the powder would stick to the parts of the drum that had been charged, This was the foundation technology for modern laser printing.

This was more efficient and modern compared to the previous printing presses, and it used electricity which made the process much faster and cheaper.