Manufacture of bonded particle boards

Details Manufacture of bonded particle boards Manufacture of bonded particle boards

1991-03-13

1992-12-15

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Stratified or layered articles

264121, 425 811, 425 831, D04H 1700, D04H 170

Patent

active

051714981

ABSTRACT:
A cement-bonded particle board with finer particles concentrated at the surfaces of the board and coarser particles concentrated within the board is formed by spreading the particulate material onto a moving carrier (50), the particulate material initially being projected in a first generally horizontal direction above the carrier and allowed to fall gravitationally without interacting with any fixed surface, whilst the falling particles are subjected to a through-flow of air [B] immediately above the carrier in a second direction opposite to that in which the particles are initially projected, the coarser particles being projected preferentially in said first direction and the finer particles being carried preferentially in said second direction by the airstream [B] to effect a second stage of separation.

REFERENCES:
patent: 2744045 (1956-05-01), Collins
patent: 2979105 (1961-04-01), Burkner
patent: 3299478 (1967-01-01), Gaitten
patent: 3873662 (1975-03-01), Cartlidge et al.
patent: 4402890 (1983-09-01), Offenhausen et al.
patent: 4483668 (1984-11-01), Poppelreuter
patent: 4942003 (1990-07-01), Bold

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