| IPC 6 English version | Class D21 |
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SECTION D | – TEXTILES; PAPER |
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PAPER |
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D 21 | PAPER-MAKING; PRODUCTION OF CELLULOSE |
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FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT |
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PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR |
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TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE [5] |
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PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON |
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CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES (winders or rewinders for finished products, means for adjustment of wrinkles or lateral extensions B 65 H) |
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PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D 21 C, D 21 D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B 31 OR SUBCLASS D 21 G; PAPER NOT OTHERWISE PROVIDED FOR [5] |
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FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE (manufacture of articles by dry processes B 27 N) |
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