Rank Xerox 'Telecopier 400' facsimile machine, 1974.
© Science Museum / Science & Society Picture Library
This 'Telecopier 400' facsimile machine was made by Rank Xerox Ltd in England. It is a multi-function device made for office use. In 1971 Rank Xerox introduced the first telecopier using the flat bed method of copying. In this system the paper is electronically scanned line by line on a diode ledge. The received signals are transmitted by telephone and then also transferred line by line onto an electrode comb which charges the paper electrostatically to reproduce the original image.