IPC-Stelle: D21B [Version 2017.01]

SymbolTypTitel
DSKTEXTILES; PAPER
D21USKPAPER
D21KLPAPER-MAKING; PRODUCTION OF CELLULOSE
D21BUKLFIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
D21B 1/00HGRFibrous raw materials or their mechanical treatment (pretreatment of the finely-divided materials before digesting D21C 1/00; methods of beating or refining pulp D21D 1/00; purification of the pulp suspension by mechanical means D21D 5/00) [1, 2006.01]
D21B 1/02UGR1
.Pretreatment of the raw materials by physical or chemical means (removal of bark B27L) [1, 2006.01]
D21B 1/04UGR1
.by dividing raw materials into small particles, e.g. fibres (breaking-up or cutting wood or the like by dry methods B27L;  mechanical separation of fibres from plant material D01B 1/00; hackling or heckling machines D01B 5/00) [1, 2006.01]
D21B 1/06UGR2
. .by dry methods [1, 2006.01]
D21B 1/08UGR3
. . .the raw material being waste paper; the raw material being rags [1, 2006.01]
D21B 1/10UGR4
. . . .by cutting actions [1, 2006.01]
D21B 1/12UGR2
. .by wet methods, by the use of steam [1, 2006.01]
D21B 1/14UGR3
. . .Disintegrating in mills [1, 2006.01]
D21B 1/16UGR4
. . . .in the presence of chemical agents [1, 2006.01]
D21B 1/18UGR4
. . . .in magazine-type machines [1, 2006.01]
D21B 1/20UGR5
. . . . .with chain feed [1, 2006.01]
D21B 1/22UGR5
. . . . .with screw feed [1, 2006.01]
D21B 1/24UGR5
. . . . .of the pocket type [1, 2006.01]
D21B 1/26UGR4
. . . .Driving or feeding arrangements [1, 2006.01]
D21B 1/28UGR4
. . . .Dressers for mill stones, combined with the mill [1, 2006.01]
D21B 1/30UGR3
. . .Defibrating by other means [1, 2006.01]
D21B 1/32UGR4
. . . .of waste paper [1, 2006.01]
D21B 1/34UGR4
. . . .Kneading or mixing; Pulpers [1, 2006.01]
D21B 1/36UGR4
. . . .Explosive disintegration by sudden pressure reduction [1, 2006.01]
D21B 1/38UGR1
.Conserving the finely-divided cellulosic material [1, 2006.01]