Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Surface deformation means only
Patent
1982-05-14
1985-03-12
Hall, James R.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Surface deformation means only
425394, 425397, A01J 2100
Patent
active
045042071
ABSTRACT:
A press for the production of particleboard from a preformed mat of wood particles and a suitable binder has spaced apart frames aligned one after the other and first and second parallel press platens movable toward and away from each other. The improvement comprises motivating structure connected between the first press platen and at least some of the frames for moving that platen to an extended position toward the second platen and against the preformed mat to thereby close the press. Dimensionally stable support structure positioned between the press frames and the first press platen maintains that platen at its extended position while preventing bending or arching thereof. Actuator structure connected between the press frames and the second press platen moves that platen toward the first platen and against the preformed mat while maintaining the second platen substantially parallel to the first to thereby press the preformed mat. Separating the press procedure into a closing step and a pressing step produces particleboards having a high degree of thickness precision.
REFERENCES:
patent: 3096545 (1963-07-01), Rowland
patent: 4005967 (1977-02-01), Ayres et al.
patent: 4147486 (1979-04-01), Jahnle
Carl Schenck AG.
Hall James R.
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