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)

Child Classifications

Navigate with arrow keys, Enter to open

• D21H 23/02 characterised by the manner in which substances are added
• D21H 23/76 characterised by choice of auxiliary compounds which are added separately from at least one other compound, e.g. to improve the incorporation of the latter or to obtain an enhanced combined effect (D21H17/18, D21H17/70, D21H23/10 take precedence)
• D21H 23/78 Controlling or regulating not limited to any particular process or apparatus