B - Operations – Transporting – 07 – B
Patent
B - Operations, Transporting
07
B
B07B 1/18 (2006.01) B07B 1/22 (2006.01) B07B 15/00 (2006.01)
Patent
CA 2074052
The present invention is directed to a method for screening granular material which makes use of a tilted belt conveyor over which is mounted, at its lower end, a screening device for the granular material which is dropped on the upwardly movable belt conveyor. The screened material is collected at the upper end of the belt conveyor. The invention is also directed to the screening assembly which comprises a tilted conveyor means over which is mounted a rotatable cylindrical drum axially oriented in the direction of the conveyor means and a mixed soil receiving bucket mounted over the conveyor means upstream of the cylindrical drum. The bucket is provided with means for transporting a mixture of soil and debris towards the cylindrical drum. The cylindrical drum while rotating allows the soil to drop on the conveyor means while the debris are rejected at the lower end of the drum. The invention particularly makes use of a screening drum which includes a cylindrical meshed screen supported by two end rings at both ends of the meshed screen. The drum is rotated by a pair of driving wheels located under each of the rings. One of the rings includes an outer radial flange which is adapted to abut on a pair of wheels for preventing the tilted drum from sliding downwardly.
Goudreau Gage Dubuc
Laprade Real R.
LandOfFree
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