Manufacture of substantially flat articles, e.g. boards, from particles or fibres [4]
B27N 3/02
·
from particles [4]
B27N 3/04
·
from fibres [4]
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 [4]