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Scanners mentioned in "The Reproduction of Color (6th ed.)" by R.W.G. Hunt:
Hardy and Wurzburg (first invented in 1948) Their academic paper was realized in several forms of flat-bed hardware over a decade, by several companies including Interchemical and RCA. The first one required photographic color separations, but did the calculations for each ink color from the three color separations. Exposure was onto photographic plates.
P.D.I. (Printing Developments Incorporated), also known as the Time-Life Springdale scanner, circa 1951. This one scanned a color transparency on a drum, and exposure was on photographic film.
Fairchild, circa 1964 - drum scanner
Other drum scanners: Crosfield; Hell; Linotype-Paul Linoscan
Other flatbed: Hell Colorgraph (1958); Hell Vario Klischograph (1954, 1957), which made directly engraved metal printing plates or halftone films;
Others:Hunter-Penrose; Crosfield Scanatron; Log-Etronic
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