Platen

Webster's Dictionary of the English Language

·noun The part of a printing press which presses the paper against the type and by which the impression is made.

II. Platen ·noun Hence, an analogous part of a typewriter, on which the paper rests to receive an Impression.

III. Platen ·noun The movable table of a machine tool, as a planer, on which the work is fastened, and presented to the action of the tool;

— also called table.