Flatting mill

A rolling mill producing sheet metal; esp., in mints, the mill producing the ribbon from which the planchets are punched.
A mill in which grains of metal are flatted by steel rolls, and reduced to metallic dust, used for purposes of ornamentation.

See also: Flatting, Flatting

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.