|
D21B
|
FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
|
|
|
| |
|
D21C
|
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
|
|
|
| |
|
D21D
|
TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE[5]
|
|
|
| |
|
D21F
|
PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
|
|
|
| |
|
D21G
|
CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES (winders or rewinders for finished products, means for adjustment of wrinkles or lateral extensions B65H)
|
|
|
| |
|
D21H
|
PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21DIMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21GPAPER NOT OTHERWISE PROVIDED FOR[5]
|
|
|
| |
|
D21J
|
FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-M$00C2CH$00C9 (manufacture of articles by dry processes B27N)
|
|
|
| |