Quaz - that sounds like linotype to me.
And yes I am older than I look. Used to work on the then hot metal, Linotype Reading Chronicle in the 70's. Then a stint on the Monotype Henley Standard. Linotype had each line as a piece of metal, and Monotype had each letter individually cast. Once the page was finished and locked, the Chronicle used glorified papier maché flongs to take an impression of the page. This in turn - being flexible - was used to cast the curved plates that went on the rotary press.
The Henley Standard was printed on a flatbed printer in those days, so was printed directly from the flat frame of type.
Just to be even more boring, the linotype machine's keyboard had a different layout to QWERTY, and gave rise to the word ETAOIN - these being the most commonly used letters.
Modern technology is so soulless, which is why I get such a buzz from old books.