|
D21D 1/00
|
Methods of beating or refiningBeaters of the Hollander type |
|
D21D 1/02
|
Methods of beatingBeaters of the Hollander type |
|
D21D 1/04
|
Beater rolls or bars |
|
D21D 1/06
|
Bed plates |
|
D21D 1/08
|
Beaters with means for driving the pulp quickly |
|
D21D 1/10
|
Beaters with means for regulating the pressure between the beater roll and the bed plate |
|
D21D 1/12
|
Beaters with means for continuous pulp discharge |
|
D21D 1/14
|
Beaters with one beater roll and with vertical stuff circulation canal |
|
D21D 1/16
|
Beaters with means for returning the pulp over the head of the beater roll |
|
D21D 1/18
|
Beaters with two or more beater rolls |
|
D21D 1/20
|
Methods of refining |
|
D21D 1/22
|
Jordans |
|
D21D 1/24
|
Jordan rolls |
|
D21D 1/26
|
Jordan bed plates |
|
D21D 1/28
|
Ball or rod mills |
|
D21D 1/30
|
Disc mills |
|
D21D 1/32
|
Hammer mills |
|
D21D 1/34
|
Other mills or refiners |
|
D21D 1/36
|
Other mills or refiners with vertical shaft |
|
D21D 1/38
|
Other mills or refiners with horizontal shaft |
|
D21D 1/40
|
Washing the fibres |
|
D21D 5/00
|
Purification of the pulp suspension by mechanical meansApparatus therefor |
|
D21D 5/02
|
Straining or screening the pulp |
|
D21D 5/04
|
Flat screens |
|
D21D 5/06
|
Rotary screen-drums |
|
D21D 5/08
|
Rotary screen-drums combined with a rocking movement |
|
D21D 5/10
|
Rotary screen-drums combined with a rocking movement of the tank |
|
D21D 5/12
|
Rotary screen-drums combined with a rocking movement of the screen |
|
D21D 5/14
|
Rotary screen-drums combined with a rocking movement of the tank and the screen |
|
D21D 5/16
|
Cylinders and plates for screens |
|
D21D 5/18
|
Purification of the pulp suspension by mechanical meansApparatus therefor with the aid of centrifugal force |
|
D21D 5/20
|
Purification of the pulp suspension by mechanical meansApparatus therefor with the aid of centrifugal force in apparatus with a horizontal axis |
|
D21D 5/22
|
Purification of the pulp suspension by mechanical meansApparatus therefor with the aid of centrifugal force in apparatus with a vertical axis |
|
D21D 5/24
|
Purification of the pulp suspension by mechanical meansApparatus therefor with the aid of centrifugal force in cyclones |
|
D21D 5/26
|
De-aeration of paper stock |
|
D21D 5/28
|
Tanks for storing or agitating pulp |
|
D21D 99/00
|
Subject matter not provided for in other groups of this subclass |
