Apparatus permitting switching from one technique to another

Processes or apparatus for adding material to the pulp or to the paper > characterised by the manner in which substances are added > Addition to the formed paper > Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group > Apparatus permitting switching from one technique to another

Processes or apparatus for adding material to the pulp or to the paper (applying liquids or other fluent material to surfaces, in general B05; processes for making continuous lengths of paper D21F11/00) > characterised by the manner in which substances are added > Addition to the formed paper > Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group > Apparatus permitting switching from one technique to another