IPC-Stelle: D21D [Version 2006.01]

SymbolTypTitel
DSKSECTION D — TEXTILES; 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 (knotter screens D21F)
D21D 1/02UGR1
.Methods of beating; Beaters of the Hollander type
D21D 1/04UGR2
. .Beater rolls or bars
D21D 1/06UGR2
. .Bed plates
D21D 1/08UGR2
. .Beaters with means for driving the pulp quickly
D21D 1/10UGR2
. .Beaters with means for regulating the pressure between the beater roll and the bed plate
D21D 1/12UGR2
. .Beaters with means for continuous pulp discharge
D21D 1/14UGR2
. .Beaters with one beater roll and with vertical stuff circulation canal
D21D 1/16UGR2
. .Beaters with means for returning the pulp over the head of the beater roll
D21D 1/18UGR2
. .Beaters with two or more beater rolls
D21D 1/20UGR1
.Methods of refining
D21D 1/22UGR2
. .Jordans
D21D 1/24UGR3
. . .Jordan rolls
D21D 1/26UGR3
. . .Jordan bed plates
D21D 1/28UGR2
. .Ball or rod mills
D21D 1/30UGR2
. .Disc mills
D21D 1/32UGR2
. .Hammer mills
D21D 1/34UGR2
. .Other mills or refiners
D21D 1/36UGR3
. . .with vertical shaft
D21D 1/38UGR3
. . .with horizontal shaft
D21D 1/40UGR2
. .Washing the fibres
D21D 5/00HGRPurification of the pulp suspension by mechanical means; Apparatus therefor (centrifuges, cyclones B04)
D21D 5/02UGR1
.Straining or screening the pulp
D21D 5/04UGR2
. .Flat screens
D21D 5/06UGR2
. .Rotary screen-drums
D21D 5/08UGR3
. . .combined with a rocking movement
D21D 5/10UGR4
. . . .of the tank
D21D 5/12UGR4
. . . .of the screen
D21D 5/14UGR4
. . . .of the tank and the screen
D21D 5/16UGR2
. .Cylinders and plates for screens
D21D 5/18UGR1
.with the aid of centrifugal force
D21D 5/20UGR2
. .in apparatus with a horizontal axis
D21D 5/22UGR2
. .in apparatus with a vertical axis
D21D 5/24UGR2
. .in cyclones
D21D 5/26UGR1
.De-aeration of paper stock
D21D 5/28UGR1
.Tanks for storing or agitating pulp
D21D 99/00HGRSubject matter not provided for in other groups of this subclass [2006.01]