1749 T. Prior 50 Others..maintain, that these Rubbing Machines make the Cloth look finer and whiter.
1845 VIII. 704 Rubbing machine.—This is used immediately after the preceding breaking process.
1996 Jan. 88/1 After the selected grains have been rigorously cleaned by a series of rubbing machines, sieves, aspirators and de-stoners.., milling can start.