Measuring and testing – Particle size
Patent
1989-07-25
1990-09-18
Raevis, Robert
Measuring and testing
Particle size
G01N 1502
Patent
active
049570102
ABSTRACT:
A method and apparatus for determining the particle size distribution of lightweight expanded polymers such as shredded expanded polystyrene is disclosed. The material to be sized is initially contained in a chamber which is in communication with gas supply. The gas supply urges the material through a plurality of sieves by means of a downward draft and agitation.
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Allen-Bradley Sonic Sifter, Aug. 1965.
Baker William L.
Lemack Kevin S.
Raevis Robert
W. R. Grace & Co.,-Conn.
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