Addition to the formed paper

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 formed paper

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 23/24 during paper manufacture
• D21H 23/3 Pretreatment of the paper
• D21H 23/32 by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
• D21H 23/46 Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
• D21H 23/5 Spraying or projecting
• D21H 23/52 by contacting paper with a device carrying the material
• D21H 23/66 Treating discontinuous paper, e.g. sheets, blanks or rolls
• D21H 23/7 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