by selecting point of addition or time of contact between components

Full Title

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 pulp; After-treatment of added substances in the pulp > Controlling the addition > by selecting point of addition or time of contact between components

Classification Context

Section:

TEXTILES; PAPER

Class:

PAPER-MAKING; PRODUCTION OF CELLULOSE

Subclass:

PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES ,; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS OR SUBCLASS; PAPER NOT OTHERWISE PROVIDED FOR

Child Classifications

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• D21H 23/16 Addition before or during pulp beating or refining
• D21H 23/18 Addition at a location where shear forces are avoided before sheet-forming, e.g. after pulp beating or refining