Patent ID: 7267234

Claim:
Backflushable filtering apparatus for a molten material, particularly for a plastic melt, comprising a housing ( 1 ) in which a sieving arrangement ( 17 ) is provided which includes at least two sieving sections ( 16 ) separated from one another, to which the melt to be filtered is supplied via at least one distributor ( 3 ) which includes at least one control body ( 9 ) for backflushing, moveable within a housing ( 53 ) that is provided with an inlet opening ( 4 ) for the material to be filtered, said control body, in a filtering position, unblocking the influx of material to be filtered to all sieving sections ( 16 ) through connection channels ( 23 ), while in a backflushing position interrupting the influx of material to the filtering section ( 16 ) to be backflushed and interconnecting the connection channel ( 23 ) of the sieving section ( 16 ) flushed back with a discharge channel ( 28 ) located in the control body ( 9 ) and leading away from it, at least the majority of the circumference of the control body ( 9 ) being surrounded by a distribution space ( 7 ) for the material to be filtered which is situated within the housing ( 53 ) of the distributor ( 3 ), said distribution space ( 7 ) being connectable through the connection channels ( 23 ) to all sieving sections ( 16 ) in communication with the distributor ( 3 ), characterized in that guiding channels ( 6 ) lead from the inlet opening ( 4 ) to the regions of the two front ends ( 61 , 62 ) of the distribution space ( 7 ), that said front ends ( 61 , 62 ) are situated in the region of the outermost connection channels ( 23 ) or outside the region of all connection channels ( 23 ), and that the discharge channel ( 28 ) may be caused to communicate with the connection channel ( 23 ) of the respective sieving section ( 16 ) to be flushed back through a flush back channel ( 27 ) of at least one cross-piece ( 14 ) of the control body ( 9 ) which overbridges the distribution space ( 7 ).