(0)D21D:0/0:
IPC6
SECTION D - TEXTILES; PAPER
TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
D21D
1/1
D 21 D
TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE [5]
1
/
00
Methods of beating or refining; Beaters of the Hollander type
(knotter screens
D 21 F
)
1
/
02
•
Methods of beating; Beaters of the Hollander type
1
/
04
•
•
Beater rolls or bars
1
/
06
•
•
Bed plates
1
/
08
•
•
Beaters with means for driving the pulp quickly
1
/
10
•
•
Beaters with means for regulating the pressure between the beater roll and the bed plate
1
/
12
•
•
Beaters with means for continuous pulp discharge
1
/
14
•
•
Beaters with one beater roll and with vertical stuff circulation canal
1
/
16
•
•
Beaters with means for returning the pulp over the head of the beater roll
1
/
18
•
•
Beaters with two or more beater rolls
1
/
20
•
Methods of refining
1
/
22
•
•
Jordans
1
/
24
•
•
•
Jordan rolls
1
/
26
•
•
•
Jordan bed plates
1
/
28
•
•
Ball or rod mills
1
/
30
•
•
Disc mills
1
/
32
•
•
Hammer mills
1
/
34
•
•
Other mills or refiners
1
/
36
•
•
•
with vertical shaft
1
/
38
•
•
•
with horizontal shaft
1
/
40
•
•
Washing the fibres
5
/
00
Purification of the pulp suspension by mechanical means; Apparatus therefor
(centrifuges, cyclones
B 04
)
5
/
02
•
Straining or screening the pulp
5
/
04
•
•
Flat screens
5
/
06
•
•
Rotary screen-drums
5
/
08
•
•
•
combined with a rocking movement
5
/
10
•
•
•
•
of the tank
5
/
12
•
•
•
•
of the screen
5
/
14
•
•
•
•
of the tank and the screen
5
/
16
•
•
Cylinders and plates for screens
5
/
18
•
with the aid of centrifugal force
5
/
20
•
•
in apparatus with a horizontal axis
5
/
22
•
•
in apparatus with a vertical axis
5
/
24
•
•
in cyclones
5
/
26
•
De-aeration of paper stock
5
/
28
•
Tanks for storing or agitating pulp
