Patent ID: 6375013
Filing Date: 2002-04-23
Classification: B01D,B29C

Abstract:
Apparatus for ridding a viscous material of solid contaminants, comprising:a housing fitted with a feed duct for the material to be purified and an evacuation duct for the purified material, a filter belt/band, displaceable in its longitudinal direction and capable of separating the solid contaminants from the viscous material passing therethrough, inserted in a sealing manner in the flow path of the material inside the housing between the feed duct and the evacuation duct, a conveyor advancing the filter belt/band continuously or stepwise, a support structure stationary in the flow path and mounted on the side of the filter belt/band facing the evacuation duct, the support structure comprising: a support surface supporting the filter belt/band comprising a curved support portion in the form of a cylinder, which deflects the filter belt/band by an angle more than 90Â°, and parallel first and second planar portions separated by the curved support portion wherein the support surface is substantially planar at the first and second planar portions, the first and second planar portions respectively adjoining the curved support portion in a tangential and flush manner thereto, a plurality of channels which are mutually parallel and adjacent each other running in a conveying direction of the filter belt/band and open to the support surface at least in the region of the curved support portion, and a plurality of connecting ducts beginning at, and in fluid communication with the channels moving the purified material to the evacuation duct, wherein the feed duct comprises a feed chamber covering at least the region of the support surface fitted with channels.