1830 6 New Ser. 308 Specification of a patent for an improvement in the manufacture of Paper, by means of a machine called a 'Pulp Dresser'. Granted to E. H. Thomas and N. Woodcock,..August 11, 1830.
a1877 E. H. Knight II. 1823/2 Pulp-dresser, a machine for removing specks and knots from paper-pulp.