What does the word platen mean?

Usage examples for platen

  1. For this purpose an impression is first made upon a stout cardboard, which is fixed firmly enough on the bed to prevent its shifting, the block being affixed to the platen. – Practical Bookbinding by Paul Adam
  2. Platen is one of the greatest masters of form in German literature and is unrivalled as a master of the sonnet. – A Book Of German Lyrics by Various