Two-ply crowned-and-tensioned anti-clogging screen system

Details Two-ply crowned-and-tensioned anti-clogging screen system Two-ply crowned-and-tensioned anti-clogging screen system

B - Operations, Transporting

07

B

209/118

B07B 1/28 (2006.01)

Patent

CA 1081658

NON-CLOGGING SCREEN APPARATUS ABSTRACT OF THE DISCLOSURE A vibratory screening apparatus has a pair of screen cloths in close face to face abutment with the strands or 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 strands 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 fifty 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, the coarser mesh screen having upper edges defining a transverse arch for supporting the screen cloths in an upwardly arched formation so that the longitudinal strands of one screen are held securely against the transverse strands of the other screen and vice versa.

276989

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