CPC Definition - Subclass B27N

Last Updated Version: 2022.01
MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL (containing cementitious material B28B; shaping of substances in a plastic state B29C; fibreboards made from fibrous suspensions D21J; drying F26B 17/00)
Synonyms and Keywords

In patent documents, the following abbreviations are often used:

CTMP

chemithermomechanical pulp

TMP

thermomechanical pulp

HDF

high density fibreboard

MDF

medium density fibreboard

OSB

oriented strand board

Pretreatment of moulding material
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Manufacture of wood shavings, chips, powder or the like

B27L 11/00

Fibrous raw materials or their mechanical treatment

D21B 1/00

Special rules of classification

Pretreatments are actions performed before the manufacturing of the Pretreatment of moulding material refers for instance to actions for reducing formaldehyd emissions, actions for incresasing resistance to swelling by humidity and actions to mix the material with a binder.

{by spraying the agent on the falling material, e.g. with the material sliding along an inclined surface, using rotating elements or nozzles (B27N 1/0254 takes precedence)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Spraying a fluid on falling particles

B01F 25/721

Manufacture of substantially flat articles, e.g. boards, from particles or fibres
Definition statement

This place covers:

Manufacture of substantially flat articles, e.g. boards, from particles or fibres

Making particle boards or fibreboards, with preformed covering layers, the particles or fibres being compressed with the layers to a board in one single pressing operation
References
Limiting references

This place does not cover:

Lamination of pressed boards

B32B 37/10

Informative references

Attention is drawn to the following places, which may be of interest for search:

(Laminated) flooring

E04F 15/00

Distributing or orienting the particles or fibres
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Feeding fibres to machines

D01G 23/00

{Orienting the particles or fibres}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Roller screens

B07B 1/14

Roller screen using corrugated, grooved or ribbed rollers

B07B 1/15

characterised by using continuously acting presses having endless belts or chains moved within the compression zone
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Veneer presses; Press plates; Plywood presses with endless arrangement of moving press plates, belts or the like

B27D 3/04

Wherein the pressing means is in the form of an endless band co-oprating with an another endless band

B30B 5/06

characterised by using extrusion presses
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Extrusion presses in general of plastics or substances in a plastic state

B29C 48/00

Manufacture of non-flat articles
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Solid fuels essentially based on vegetable substances, i.e. wood pellets

C10L 5/44

After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
Definition statement

This place covers:

After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity

{Coating boards, e.g. with a finishing or decorating layer}
References
Limiting references

This place does not cover:

Lamination of pressed boards

B32B 37/10

Arrangements for fireproofing (fireproofing materials C09K 21/00)
Definition statement

This place covers:

Arrangements for fireproofing