Why was "tantrum" trending last week?
1889, "copying machine" (invented by Edison), from Greek mimeisthai "to mimic, represent, imitate, portray," in art, "to express by means of imitation," from mimos "mime" (see mime (n.)) + -graphos, from graphein "to write" (see -graphy). A proprietary name from 1903 to 1948. The verb meaning "to reproduce by means of a mimeograph" is first attested 1895. Related: Mimeographed; mimeographing.
duplicatingduplicating machine that uses a stencil consisting of a coated fibre sheet through which ink is pressed. Employing a typewriter with the ribbon shifted out of the way so that the keys do not strike it, the information to be duplicated is typed on the stencil. The keys cut the coating on the stencil and expose the fibre base, making it possible for ink to pass through it. Corrections can be made by a sealing fluid that permits retyping over the patched-error position. Signature or drawings are added on the stencil with a hand stylus