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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
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

Fibrous raw materials or their mechanical treatment

Special rules of classification within this subclass/group

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

Spraying a fluid on falling particles

Manufacture of substantially flat articles, e.g. boards, from particles or fibres
Definition statement
This group 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 relevant to classification in this group
This subgroup does not cover:

Lamination of pressed boards

B32B31/00

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

(Laminated) flooring

Distributing or orienting the particles or fibres
Informative references
Attention is drawn to the following places, which may be of interest for search:

Feeding fibres to machines

{Orienting the particles or fibres}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Roller screens

Roller screen using corrugated, grooved or ribbed rollers

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

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

characterised by using extrusion presses
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

Manufacture of non-flat articles
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

After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
Definition statement
This group 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 relevant to classification in this group
This subgroup does not cover:

Lamination of pressed boards

B32B31/00

Arrangements for fireproofing (fireproofing materials C09K 21/00)
Definition statement
This group covers:

Arrangements for fireproofing

This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013