Patent classifications
D
TEXTILES; PAPER
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D21
PAPER-MAKING; PRODUCTION OF CELLULOSE
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D21H
PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
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5/00
Special paper or cardboard not otherwise provided for
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D21H5/0005
Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating
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D21H5/0025
by contact with a device carrying the treating material
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D21H5/0032
Details thereof, e.g. surface characteristics, peripheral speed
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D21H5/0037
Reverse roll coating, e.g. applicator surface moving in direction opposite to that of paper
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