A cleaning device for removing solid impurities from viscous material, in particular molten plastics material, comprising, inside a housing (1), a filter band (5) for separating out solid impurities which can be moved in the longitudinal direction of the housing. The filter band (5) is wrapped aroun
A cleaning device for removing solid impurities from viscous material, in particular molten plastics material, comprising, inside a housing (1), a filter band (5) for separating out solid impurities which can be moved in the longitudinal direction of the housing. The filter band (5) is wrapped around a curved supporting area (7) of a fixed supporting member (3) at an angle of wrap of preferably approximately 180.degree., and is guided on both sides of the curved supporting area (7) in planar supporting areas (15, 17) which lie tangentially and flush against the curved supporting area (7). To reduce the kinetic resistance of the filter band (5), the curved supporting area (7) and at least partly the planar supporting areas (15, 17) are provided with channels (25) extending in the direction of transport of the filter band (5). The plastic material to be cleaned is supplied via a feeding chamber (23) surrounding the supporting area, and after it has been cleaned, is removed via connecting ducts (27, 35) extending from the channels (25). On the outlet side of the cleaning device the filter band (5) passes through a cleaning solution (67). In this way, the filter band can be reused. The proposed cleaning device is compact and allows for relatively large effective filtering surfaces.
대표청구항▼
1. 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 contami
1. 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 90.degree., 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.
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이 특허에 인용된 특허 (8)
Tsuhako Parker I. (1412 W. 148th St. Gardena CA 90247), Aquarium filtering system.
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