D21J

FIBREBOARD

MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE manufacture of articles by dry processes B27N

In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.

D21J1/00

Fibreboard preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F

D21J1/02

Cutting, e.g. using wet saws

D21J1/04

Pressing

D21J1/06

Drying

D21J1/08

Impregnated or coated fibreboard

D21J1/10

After-treatment

D21J1/12

Hardening

D21J1/14

Conditioning

D21J1/16

Special fibreboard

D21J1/165

Roofing material

D21J1/18

Hardboard

D21J1/20

Insulating board

D21J3/00

Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds

D21J3/02

of rings

D21J3/04

of tubes

D21J3/06

of stoppers

D21J3/08

of bobbins

D21J3/10

of hollow bodies

D21J3/12

of sheets

of diaphragms

D21J5/00

Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch-moulds

D21J7/00

Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould