Platen

1. n. 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.
2. n. The part of a printing press which presses the paper against the type and by which the impression is made.
3. n. Hence, an analogous part of a typewriter, on which the paper rests to receive an impression.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.