Classifying – separating – and assorting solids – Sifting – Drum sifters
Patent
1980-05-01
1981-10-13
Clements, Gregory N.
Classifying, separating, and assorting solids
Sifting
Drum sifters
29407, 29446, 209403, 209407, B07B 120, B07B 148
Patent
active
042946921
ABSTRACT:
A drum type screening machine has a centrifuging rotor within it. A perforated retaining element is carried by the shaft between a feed inlet and an entry region of the drum. Use of the retaining element prolongs the screen life so much that tension adjustment become necessary. Provision is made for this to be done from outside of the machine. The screening drum has a pair of rings which support the screening cloth and which are held apart at an adjustable distance by tensioning bars. One ring is supported within an end member of the machine housing and the other on support means within the housing. Each bar is externally threaded, e.g. by way of an extension sleeve that is axially fast with the bar. The sleeve is engaged by an internally threaded nut which is axially fast with the end member of the machine. The sleeve extends through that nut and through the end member to the outside of the machine. A hexagonal head formed on the end of the sleeve can be turned exteriorly of the machine with a box spanner, thereby to tension the screen cloth.
REFERENCES:
patent: 226301 (1880-04-01), Gardner et al.
patent: 265428 (1882-10-01), Neander
patent: 324187 (1885-08-01), Teague
patent: 387057 (1888-07-01), Eldred
patent: 480345 (1892-08-01), Reinbold
patent: 501898 (1893-07-01), Schupp
patent: 950170 (1910-02-01), Goetz
patent: 4133751 (1979-01-01), Stengal
Clements Gregory N.
Gebrueder Buehler AG
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