IPC-Stelle: D21D [Version 2017.01]

SymbolTypTitel
DSKTEXTILES; PAPER
D21USKPAPER
D21KLPAPER-MAKING; PRODUCTION OF CELLULOSE
D21DUKLTREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE [5]
D21D 1/00HGRMethods of beating or refining; Beaters of the Hollander type [1, 2006.01]
D21D 1/02UGR1
.Methods of beating; Beaters of the Hollander type [1, 2006.01]
D21D 1/04UGR2
. .Beater rolls or bars [1, 2006.01]
D21D 1/06UGR2
. .Bed plates [1, 2006.01]
D21D 1/08UGR2
. .Beaters with means for driving the pulp quickly [1, 2006.01]
D21D 1/10UGR2
. .Beaters with means for regulating the pressure between the beater roll and the bed plate [1, 2006.01]
D21D 1/12UGR2
. .Beaters with means for continuous pulp discharge [1, 2006.01]
D21D 1/14UGR2
. .Beaters with one beater roll and with vertical stuff circulation canal [1, 2006.01]
D21D 1/16UGR2
. .Beaters with means for returning the pulp over the head of the beater roll [1, 2006.01]
D21D 1/18UGR2
. .Beaters with two or more beater rolls [1, 2006.01]
D21D 1/20UGR1
.Methods of refining [1, 2006.01]
D21D 1/22UGR2
. .Jordans [1, 2006.01]
D21D 1/24UGR3
. . .Jordan rolls [1, 2006.01]
D21D 1/26UGR3
. . .Jordan bed plates [1, 2006.01]
D21D 1/28UGR2
. .Ball or rod mills [1, 2006.01]
D21D 1/30UGR2
. .Disc mills [1, 2006.01]
D21D 1/32UGR2
. .Hammer mills [1, 2006.01]
D21D 1/34UGR2
. .Other mills or refiners [1, 2006.01]
D21D 1/36UGR3
. . .with vertical shaft [1, 2006.01]
D21D 1/38UGR3
. . .with horizontal shaft [1, 2006.01]
D21D 1/40UGR2
. .Washing the fibres [1, 2006.01]
D21D 5/00HGRPurification of the pulp suspension by mechanical means; Apparatus therefor [1, 2006.01]
D21D 5/02UGR1
.Straining or screening the pulp [1, 2006.01]
D21D 5/04UGR2
. .Flat screens [1, 2006.01]
D21D 5/06UGR2
. .Rotary screen-drums [1, 2006.01]
D21D 5/08UGR3
. . .combined with a rocking movement [1, 2006.01]
D21D 5/10UGR4
. . . .of the tank [1, 2006.01]
D21D 5/12UGR4
. . . .of the screen [1, 2006.01]
D21D 5/14UGR4
. . . .of the tank and the screen [1, 2006.01]
D21D 5/16UGR2
. .Cylinders and plates for screens [1, 2006.01]
D21D 5/18UGR1
.with the aid of centrifugal force [1, 2006.01]
D21D 5/20UGR2
. .in apparatus with a horizontal axis [1, 2006.01]
D21D 5/22UGR2
. .in apparatus with a vertical axis [1, 2006.01]
D21D 5/24UGR2
. .in cyclones [1, 2006.01]
D21D 5/26UGR1
.De-aeration of paper stock [1, 2006.01]
D21D 5/28UGR1
.Tanks for storing or agitating pulp [1, 2006.01]
D21D 99/00HGRSubject matter not provided for in other groups of this subclass [2006.01]