platen
Concise Oxford English Dictionary © 2008 Oxford University Press:
platen /ˈplat(ə)n/
▶noun
- 1 the flat surface in a small letterpress printing press which presses the paper against the type.
- 2 the cylindrical roller in a typewriter against which the paper is held.
– origin C16: from Fr. platine ‘flat piece’ from plat ‘flat’.
'platen' also found in these Oxford entries:

