B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/742
B29C 47/68 (2006.01) B01D 29/01 (2006.01) B01D 29/52 (2006.01) B01D 29/66 (2006.01) B01D 29/70 (2006.01)
Patent
CA 1328160
ABSTRACT OF THE DISCLOSURE In a filtering apparatus for extrusion machines, a stream of heat-softened plastics material arrives, via a flow conduit in a filter housing, at an outlet, and thereby permeates replaceable filters which are carried by a slide which is temporarily slid out of the stream of plastics material. For this, the slide comprises two chambers, forming flow conduit sections and arranged spaced in tandem in the direction of displacement, both of which are closed by filter plates; the flow conduit sections being, at a specified position of the slide in the filter housing, internally in flow connection via, in each case, a port, with the outlet conduit in the filter housing and, externally, via the filter plates, with the inlet conduit or with a backflow conduit in the filter housing. As a result of these steps, apart from a filter replacement, a reestablishment of the specified through-flowability of the filter means by a backflow flushing is possible without thereby having to interrupt the flow of heat-softened plastics material either in the one or in the other case.
581675
Indupack Ag
Marks & Clerk
LandOfFree
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