1. CPC Sections
  2. CPC Section B
  3. CPC Class B27
  4. CPC Subclass B27N
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CPC
COOPERATIVE PATENT CLASSIFICATION
​​
B27N
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) [2018-08]
NOTE

  • This subclass does not cover treatment of compositions which are in a plastic state, or worked by the same type of process or apparatus as plastics, which is covered by subclass B29B or B29C.
WARNING

  • 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.
B27N 1/00
Pretreatment of moulding material [2013-01]
B27N 1/003
.
{for reducing formaldehyde gas emission} [2013-01]
B27N 1/006
.
{for increasing resistance to swelling by humidity} [2013-01]
B27N 1/02
.
Mixing the material with binding agent (mixing in general B01F) [2013-01]
B27N 1/0209
. .
{Methods, e.g. characterised by the composition of the agent} [2013-01]
B27N 1/0218
. .
{in rotating drums} [2013-01]
B27N 1/0227
. .
{using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer} [2013-01]
B27N 1/0236
. . .
{with the stirrers rotating about an horizontal axis, e.g. in consecutive casings (B27N 1/0254 takes precedence)} [2013-01]
B27N 1/0245
. . . .
{with a single stirrer shaft} [2013-01]
B27N 1/0254
. . .
{with means for spraying the agent on the material before it is introduced in the mixer} [2013-01]
B27N 1/0263
. .
{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)} [2013-01]
B27N 1/0272
. .
{by bringing the material into contact with a rotating roll provided with a layer of binding agent} [2013-01]
B27N 1/0281
. .
{Combinations of dissimilar mixers} [2013-01]
B27N 1/029
. .
{Feeding; Proportioning; Controlling} [2013-01]
B27N 3/00
Manufacture of substantially flat articles, e.g. boards, from particles or fibres [2013-01]
B27N 3/002
.
{characterised by the type of binder (compositions of macromolecular compounds C08L)} [2013-01]
B27N 3/005
.
{and foam} [2013-01]
B27N 3/007
.
{and at least partly composed of recycled material} [2013-01]
B27N 3/02
.
from particles [2013-01]
B27N 3/04
.
from fibres [2013-01]
B27N 3/06
.
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 [2013-01]
B27N 3/08
.
Moulding or pressing (presses in general B30B) [2013-01]
B27N 3/083
. .
{Agents for facilitating separation of moulds from articles} [2013-01]
B27N 3/086
. .
{Presses with means for extracting or introducing gases or liquids in the mat} [2013-01]
B27N 3/10
. .
Moulding of mats [2013-01]
B27N 3/12
. . .
from fibres [2013-01]
B27N 3/14
. . .
Distributing or orienting the particles or fibres [2013-01]
B27N 3/143
. . . .
{Orienting the particles or fibres} [2013-01]
B27N 3/146
. . . .
{Controlling mat weight distribution} [2013-01]
B27N 3/16
. .
Transporting the material from mat moulding stations to presses (B27N 3/22 takes precedence); Apparatus specially adapted for transporting the material or component parts therefor, e.g. cauls (transport devices in general B65G) [2013-01]
B27N 3/18
. .
Auxiliary operations, e.g. preheating, humidifying, cutting-off [2013-01]
B27N 3/183
. . .
{Forming the mat-edges, e.g. by cutting} [2013-01]
B27N 3/186
. . .
{Separating the cauls from the boards} [2013-01]
B27N 3/20
. .
characterised by using platen-presses [2013-01]
B27N 3/203
. . .
{with heating or cooling means} [2013-01]
B27N 3/206
. . .
{for continuous boards} [2013-01]
B27N 3/22
. . .
Charging or discharging [2013-01]
B27N 3/24
. .
characterised by using continuously acting presses having endless belts or chains moved within the compression zone [2013-01]
B27N 3/26
. .
characterised by using continuously acting presses having a heated press drum and an endless belt to compress the material between belt and drum [2013-01]
B27N 3/28
. .
characterised by using extrusion presses [2013-01]
B27N 5/00
Manufacture of non-flat articles [2013-01]
B27N 5/02
.
Hollow articles [2013-01]
B27N 7/00
After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity [2013-01]
B27N 7/005
.
{Coating boards, e.g. with a finishing or decorating layer} [2013-01]
B27N 9/00
Arrangements for fireproofing (fireproofing materials C09K 21/00) [2013-01]