Planishing rolls

from The Collaborative International Dictionary of English v.0.48

Planishing \Plan"ish*ing\,
   a. & vb. n. from {Planish}, v. t.
   [1913 Webster]

   {Planishing rolls} (Coining), rolls between which metal
      strips are passed while cold, to bring them to exactly the
      required thickness.
      [1913 Webster]