Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1981-02-02
1982-08-31
Hall, James R.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
267113, B06B 102
Patent
active
043472028
ABSTRACT:
Methods and systems are disclosed for (1) forming a mat of lignocellulosic particles electrostatically aligned in a cross-machine direction to the direction of movement of the mat being formed from the particles, and (2) forming a composite panel having a core layer of particles electrostatically aligned in the cross-machine dimension and face layers of particles electrostatically aligned in the machine direction. The multilayered or composite mat of electrostatically aligned particles employs separate orientation cells (30,32) for aligning the particles in the machine and cross-machine directions. For aligning the particles in the cross-machine direction, a uniformly distributed array of particles is passed through a high-voltage electrostatic orienting field having electrical lines of force extending substantially transverse to the direction of movement of the mat being formed. The orienting field may be formed between at least two uniformly spaced, electrically charged plates (60). The particles are deposited as a mat on a transfer belt (36) of a transfer conveyor (40) for transfer to a mat-receiving surface. The spaced, charged plates (60) are generally parallel to one another and oriented generally in the cross-machine direction of the mat being formed. The spaced, charged plates are preferably configured to spread the effects of particle migration and the shadow effect over the area of the orientation to minimize basis weight variation.
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patent: 4284595 (1981-08-01), Peters et al.
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Henckel David J.
Peters Thomas E.
Hall James R.
Morrison-Knudsen Forest Products Co., Inc.
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