“Printer’s devil” was the name given to an apprentice in a newspaper’s print room. Tasks ranged from preparing the ink, paper and type for the presses, to cleaning the machines, and running any other errands delegated by the printer. Many printer’s devils worked their way up to become master printers; others went even further and became editors or publishers. Former printer’s devils here in Tennessee include Adolph Ochs and William Rule.
“Printer’s Devil” is also the title of an excellent Twilight Zone episode (starring Burgess Meredith) set in a small town newspaper office.