Non-clogging screen apparatus

Details Non-clogging screen apparatus Non-clogging screen apparatus

1976-02-23

1977-07-05

Lutter, Frank W.

Classifying, separating, and assorting solids

Sifting

Concave and convex sifters

209319, 209402, B07B 128

Patent

active

040338657

ABSTRACT:
A vibratory screening apparatus has a pair of screen cloths in close face to face abutment with the wires of the lower screen cloth generally intersecting the openings of the upper screen cloth to prevent "blinding" of the upper screen cloth by reason of the tendency of the wires of the lower screen cloth to prevent engagement of particles in the upper screen cloth of a size which would tend to clog the openings of the upper screen cloth. The mesh size of the lower screen cloth may be equal to the mesh size of the upper screen cloth or slightly larger than the upper screen cloth openings up to about 50 per cent larger. The superposed screen cloths may rest upon a much coarser mesh screen which serves merely as a structural support for the screen cloths and does not perform a screening function.

REFERENCES:
patent: 516673 (1894-03-01), Wilson
patent: 1132667 (1915-03-01), Milliot
patent: 1713143 (1929-05-01), Overstrom
patent: 2813629 (1957-11-01), Brugmann

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